Thu·Jul 29, 2021Thursday·July 29, 2021

1. 01*

   High-energy resummation in inclusive hadroproduction of Higgs plus jet

   Francesco Giovanni Celiberto🇮🇹 · Dmitry Yu. Ivanov🇷🇺 · Mohammed. M. A. Mohammed🇮🇹 · Alessandro Papa🇮🇹

   Using the standard Balitsky-Fadin-Kuraev-Lipatov (BFKL) approach, with partial inclusion of next-to-leading order effects, we propose the inclusive hadroproduction of a Higgs boson and of a jet, featuring large transverse momenta and well separated in rapidity, as a new channel to probe the BFKL dynamics. Predictions are presented for cross-sections and azimuthal angle correlations in different kinematics configurations for the final-state transverse momenta. We find that the large energy scales provided by the emission of a Higgs boson stabilize the BFKL series.

   hep-phSciPost Phys.Proc.(2022)·29 citations
2. 02*

   Charm-baryon semileptonic decays and the strange ${\Lambda }^{\ast }$ resonances: New insights from lattice QCD

   Stefan Meinel🇺🇸 · Gumaro Rendon🇺🇸

   Understanding the properties of the strange ${\Lambda }^{\ast }$ baryon resonances is a long-standing and fascinating problem. ${\Lambda }_c$ charm-baryon semileptonic weak decays to these resonances are highly sensitive to their internal structure and can be used to test theoretical models. We have performed the first lattice-QCD computation of the form factors governing ${\Lambda }_c$ semileptonic decays to a ${\Lambda }^{\ast }$ resonance: the ${\Lambda }^{\ast }(1520)$, which has negative parity and spin $3/2$. Here we present the resulting Standard-Model predictions of the ${\Lambda }_c\to {\Lambda }^{\ast }(1520){\ell }^{+}{\nu }_{\ell }$ differential and integrated decay rates as well as angular observables. Furthermore, by combining the recent BESIII measurement of the ${\Lambda }_c\to X{e}^{+}{\nu }_e$ inclusive semipositronic branching fraction [Phys. Rev. Lett. 121, 251801 (2018)] with lattice-QCD predictions of the ${\Lambda }_c\to \Lambda e^{+}{\nu }_e$, ${\Lambda }_c\to n{e}^{+}{\nu }_e$, and ${\Lambda }_c\to {\Lambda }^{\ast }(1520)e^{+}{\nu }_e$ decay rates, we obtain an upper limit on the sum of the branching fractions to all other semipositronic final states. In particular, this upper limit constrains the ${\Lambda }_c\to {\Lambda }^{\ast }(1405)e^{+}{\nu }_e$ branching fraction to be very small, which may be another hint for a molecular structure of the ${\Lambda }^{\ast }(1405)$.

   hep-phhep-exhep-latnucl-thPRD(2022)·20 citations
3. 03*

   Probing superheavy dark matter with gravitational waves

   Ligong Bian🇨🇳 · Xuewen Liu🇨🇳 · Ke-Pan Xie🇰🇷

   We study the superheavy dark matter (DM) scenario in an extended $B-L$ model, where one generation of right-handed neutrino ${\nu }_R$ is the DM candidate. If there is a new lighter sterile neutrino that co-annihilate with the DM candidate, then the annihilation rate is exponentially enhanced, allowing a DM mass much heavier than the Griest-Kamionkowski bound ($\sim 10^5$ GeV). We demonstrate that a DM mass $M_{{\nu }_R}\gtrsim 10^{13}$ GeV can be achieved. Although beyond the scale of any traditional DM searching strategy, this scenario is testable via gravitational waves (GWs) emitted by the cosmic strings from the $U(1{)}_{B-L}$ breaking. Quantitative calculations show that the DM mass $\mathcal{O}(10^9-10^{13}\mathrm{GeV})$ can be probed by future GW detectors.

   hep-phastro-ph.COJHEP(2021)·28 citations
4. 04*

   Combined detection of supernova neutrino signals

   A. Sheshukov (1)🇷🇺 · A. Vishneva (1 and 2)🇷🇺 · A. Habig (3) ((1) Joint Institute for Nuclear Research, Dubna, Russia, (2) St. Petersburg Nuclear Physics Institute NRC Kurchatov Institute, Gatchina, Russia, (3) Department of Physics and Astronomy, University of Minnesota Duluth, USA)🇺🇸

   Supernova neutrino detection in neutrino and dark matter experiments is usually implemented as a real-time trigger system based on counting neutrino interactions within a moving time window. The sensitivity reach of such experiments can be improved by taking into account the time profile of the expected signal. We propose a shape analysis of the incoming experimental data based on a log likelihood ratio variable containing the assumed signal shape. This approach also allows a combination of potential supernova signals in different detectors for a further sensitivity boost. The method is tested on the NOvA detectors to study their combined sensitivity to the core-collapse supernova signal, and also on KamLAND, Borexino and SK-Gd as potential detectors of presupernova neutrinos. Using the shape analysis enhances the signal significance for supernova detection and prediction, as well as the sensitivity reach of the experiment. It also extends the supernova prediction time when applied to the presupernova neutrino signal detection. Enhancements achieved with the shape analysis persist even in the case when the actual signal doesn't match the expected signal model.

   hep-phastro-ph.HEastro-ph.IMJCAP(2021)·2 citations
5. 05*

   Boosted Self-Interacting Dark Matter and XENON1T Excess

   Debasish Borah (1)🇮🇳 · Manoranjan Dutta (2)🇮🇳 · Satyabrata Mahapatra (2)🇮🇳 · Narendra Sahu (2) ((1) Indian Institute of Technology Guwahati (2) Indian Institute of Technology Hyderabad)🇮🇳

   We present a self-interacting boosted dark matter (DM) scenario as a possible explanation of the recently reported excess of electron recoil events by the XENON1T experiment. The Standard Model (SM) has been extended with two vector-like fermion singlets charged under a dark $U(1{)}_D$ gauge symmetry to describe the dark sector. While the presence of light vector boson mediator leads to sufficient DM self-interactions to address the small scale issues of cold dark matter, the model with sub-GeV scale DM can explain the XENON1T excess via elastic scattering of boosted DM component with electrons at the detector. Strong annihilation of DM into the light mediator leads to a suppressed thermal relic. A hybrid setup of dark freeze-out and non-thermal contribution from the late decay of a scalar can lead to correct relic abundance. We fit our model with XENON1T data and also find the final parameter space consistent with self-interaction of DM, DM-electron scattering rate, as well as astrophysical and cosmological observations. A tiny parameter space consistent with all these constraints and requirements can be further scrutinized in near-future experiments.

   hep-phastro-ph.COhep-exNPB(2022)·23 citations
6. 06*

   Structure of the $\Omega$ baryon and the kaon cloud

   Yu-Son Jun🇰🇷 · Hyun-Chul Kim🇰🇷 · June-Young Kim🇰🇷 · Jung-Min Suh🇰🇷

   We investigate the effects of the kaon cloud on the electromagnetic and axial-vector form factors of the ${\Omega }^{-}$ baryon within the framework of the chiral quark-soliton model. We first derive the profile function of the chiral soliton in such a way that the kaon Yukawa tail is properly produced self-consistently. Then, we compute the electromagnetic form factors of the ${\Omega }^{-}$ baryon. The results for the electromagnetic form factors are compared with the lattice data. We find that the results with the kaon tail employed are in better agreement with the lattice data, compared with those obtained with the pion tail. We also study the axial-vector form factors of the ${\Omega }^{-}$ baryon, examining the effects of the kaon cloud.

   hep-phhep-exhep-latPTEP(2022)·5 citations
7. 07*

   Impact of W and Z Production Data and Compatibility of Neutrino DIS Data in Nuclear Parton Distribution Functions

   K. F. Muzakka🇩🇪 · P. Duwentäster🇩🇪 · T. J. Hobbs🇺🇸 · T. Ježo🇩🇪 · M. Klasen🇩🇪 · K. Kovařík🇩🇪 · A. Kusina🇵🇱 · J. G. Morfín🇺🇸 · F. I. Olness🇺🇸 · R. Ruiz🇵🇱 · I. Schienbein🇫🇷 · J. Y. Yu🇫🇷

   Vector boson production and neutrino deep-inelastic scattering (DIS) data are crucial for constraining the strange quark parton distribution function (PDF) and more generally for flavor decomposition in PDF extractions. We extend the nCTEQ15 nuclear PDFs (nPDFs) by adding the recent $W$ and $Z$ production data from the LHC in a global nPDF fit. The new nPDF set, referred to as nCTEQ15WZ, is used as a starting point for a follow-up study in which we assess the compatibility of neutrino DIS data with charged lepton DIS data. Specifically, we re-analyze neutrino DIS data from NuTeV, Chorus, and CDHSW, as well as dimuon data from CCFR and NuTeV. To scrutinize the level of compatibility, different kinematic regions of the neutrino data are investigated. Fits to the neutrino data alone and a preliminary global fit are performed and compared to nCTEQ15WZ.

   hep-phnucl-thSciPost Phys.Proc.(2022)·2 citations
8. 08*

   Strong decays of the $P_{cs}(4459)$ as a ${\Xi }_c{\bar{D}}^{\ast }$ molecule

   Feng Yang🇨🇳 · Yin Huang🇨🇳 · Hong Qiang Zhu🇨🇳

   In this work, we study the strong decay of the newly observed $P_{cs}(4459)$ assuming that it is a pure ${\Xi }_c{\bar{D}}^{\ast }$ molecular state. Considering two possible spin-parity assignments $J^P=1/2^{-}$ and $J^P=3/2^{-}$ the partial decay widths of the ${\Xi }_c{\bar{D}}^{\ast }$ molecular state into $J/\psi \Lambda$, $D_s^{-}{\Lambda }_c^{+}$, and $D{\Xi }_c^{{(}^{\prime })}$ final states through hadronic loops are evaluated with the help of the effective Lagrangians. In comparison with the LHCb data, the spin-party $J^P=1/2^{-}$ the assignment is preferred while this of $J^P=3/2^{-}$ is disfavored. The $P_{cs}(4459)$ in spin-parity $J^P=3/2^{-}$ case maybe explained as $S$-wave coupled bound state with lager ${\Xi }_c{\bar{D}}^{\ast }$ component. In addition, the calculated partial decay widths with $J^P=1/2^{-}$ ${\Xi }_c{\bar{D}}^{\ast }$ molecular state picture indicates that allowed decay mode, $D{\Xi }_c^{{}^{\prime }}$, may have the biggest branching ratio. The experimental measurements for this strong decay process could be a crucial test for the molecule interpretation of the $P_{cs}(4459)$.

   hep-phSCPMA(2021)·38 citations
9. 09*

   The sensitivity to BSM in di-taon production at the LHC

   Mariola Klusek-Gawenda🇵🇱 · Antoni Szczurek🇵🇱 · Mateusz Dyndal🇵🇱 · Matthias Schott🇩🇪

   We discuss the sensitivity of the $\gamma \gamma \to {\tau }^{+}{\tau }^{-}$ process in ultraperipheral Pb+Pb collisions at LHC energies on the anomalous magnetic moment of $\tau$ lepton ($a_{\tau }$). We derive the corresponding cross sections considering semi-leptonic decays of both leptons in the fiducial volume of ATLAS and CMS detectors. The expected limits on $a_{\tau }$ with the existing Pb+Pb dataset are found to be better by a factor of two comparing to current best experimental limits and can be further improved by another factor of two at High Luminosity LHC. In addition, our results for tau lepton electric dipole moment, $d_{\tau }$, can be competitive with the current best limits that were obtained by the Belle experiment.

   hep-ph0 citations
10. 10*

    What is the mechanism of the $T_{4c}(6900)$ tetraquark production?

    A. Szczurek🇵🇱 · R. Maciuła🇵🇱 · W. Schäfer🇵🇱

    We discuss the production mechanism of fully charm tetraquark, observed recently by the LHCb at M = 6.9 GeV in the $J/\psi J/\psi$ channel. Both single parton scattering (SPS) and double parton scattering (DPS) mechanisms are considered. We calculate the distribution in the invariant mass of the four-quark system $M_{4c}$ for SPS and DPS production of $cc\bar{c}\bar{c}$ in the $k_t$-factorization approach. We present transverse momentum distribution in $p_{t,4c}$ for $c\bar{c}c\bar{c}$ system in a mass window around tetraquark mass. The calculation of the SPS $g^{\ast }{g}^{\ast }\to T_{4c}(6900)$ fusion mechanism is performed in the $k_T$-factorization approach assuming different spin scenarios ($0^{+}$ and $0^{-}$).

    hep-ph2 citations
11. 11*

    Central dileption production in proton-proton collisions with rapidity gap and with forward protons

    Antoni Szczurek🇵🇱 · Barbara Linek🇵🇱 · Marta Luszczak🇵🇱

    We discuss photon-photon fusion mechanisms of dilepton production in proton-proton collisions with rapidity gap in the main detector and one forward proton in the forward proton detectors. This is relevant for the LHC measurements by ATLAS+AFP and CMS+PPS. Transverse momenta of the intermediate photons are taken into account and photon fluxes are expressed in terms of proton electromagnetic form factors and structure functions. Both double-elastic and single-dissociative processes are included in the analysis. Different parametrizations of the structure functions are used. Some differential distributions are presented. Some differences with respect to the results without proton measurement are discussed.

    hep-phSciPost Phys.Proc.(2022)·1 citation
12. 12*

    Probing Hidden Sectors with a muon beam: Total and differential cross-sections for vector boson production in muon bremsstrahlung

    D. V. Kirpichnikov🇷🇺 · H. Sieber🇨🇭 · L. Molina Bueno🇨🇭 · P. Crivelli🇨🇭 · M. M. Kirsanov🇷🇺

    Vector bosons, such as Dark Photon $A^{\prime }$ or $Z^{\prime }$, can couple to muons and be produced in the bremsstrahlung reaction ${\mu }^{-}+N\to {\mu }^{-}+N+A^{\prime }(Z^{\prime })$. Their possible subsequent invisible decay can be detected in fixed target experiments through missing energy/momentum signature. In such experiments, not only is the energy transfer to $A^{\prime }(Z^{\prime })$ important, but also the recoil muon angle ${\psi }_{{\mu }^{\prime }}$. In this paper, we derive the total and the double differential cross-sections involved in this process using the phase space Weiszäcker-Williams and improved Weiszäcker-Williams approximations, as well as using exact-tree-level calculations. As an example, we compare the derived cross-sections and resulting signal yields in the NA64$\mu$ experiment that uses a 160 GeV muon beam at the CERN Super Proton Synchrotron accelerator. We also discuss its impact on the NA64$\mu$ expected sensitivity to explore the $(g-2{)}_{\mu }$ anomaly favoured region with a $Z^{\prime }$ boson considering $10^{12}$ muons accumulated on target.

    hep-phhep-exPRD(2021)·29 citations
13. 13*

    Reweighting the quark Sivers function with STAR jet data

    Carlo Flore🇫🇷 · Maria Elena Boglione🇮🇹 · Umberto D'Alesio🇮🇹 · Josè Osvaldo Gonzalez-Hernandez🇮🇹 · Francesco Murgia🇮🇹 · Alexei Prokudin🇺🇸

    The Bayesian reweighting procedure is applied for the first time to a TMD distribution, the quark Sivers function extracted from SIDIS data. By exploiting the recent published single spin asymmetry data for the inclusive jet production in $p^{\uparrow }p$ collisions from the STAR collaboration at RHIC, we show how such a procedure allows to incorporate the information contained in the new data set, without the need of re-fitting, and to explore a much wider $x$ region compared to SIDIS measurements. The reweighting method is also extended to the case of asymmetric errors, and the results show a significant improvement on the knowledge of the quark Sivers function.

    hep-phhep-exnucl-thSciPost Phys.Proc.(2022)·1 citation
14. 14*

    Renormalization group optimized $\lambda {\varphi }^4$ pressure at next-to-next-to-leading order

    Loïc Fernandez🇫🇷 · Jean-Loïc Kneur🇫🇷

    We investigate the renormalization group optimized perturbation theory (RGOPT) at the next-to-next-to-leading order (NNLO) for the thermal scalar field theory. From comparing three thus available successive RGOPT orders we illustrate the efficient resummation and very good apparent convergence properties of the method. In particular the remnant renormalization scale dependence of thermodynamical quantities is drastically improved as compared to both standard perturbative expansions and other related resummation methods, such as the screened perturbation theory. Our present results thus constitute a useful first NNLO illustration in view of NNLO applications of this approach to the more involved thermal QCD.

    hep-phPRD(2021)·6 citations
15. 15*

    Solar axions in large extra dimensions

    Mar Bastero-Gil🇪🇸 · Cyprien Beaufort🇫🇷 · Daniel Santos🇫🇷

    The axion could be used as a probe for extra dimensions. In large extra dimensions, besides the QCD axion one obtains an infinite tower of massive Kaluza-Klein (KK) states. We describe the processes of KK axions production in the Sun via the axion-photon coupling, $g_{a\gamma \gamma }$, and we derive the number density of KK axions that get trapped into the solar gravitational field and then accumulate over cosmic times. The large multiplicity of states, as well as their masses in the keV-range, deeply alter the phenomenology of the axion. This scenario leads us to propose the presence of KK axions as an interpretation of the non-thermal distribution of the solar X-rays. In this work, we dedicate special attention on the astrophysical and cosmological bounds that apply on the model. In particular, we show how the KK axions may escape the EBL limit that constrains standard ALPs in the same mass range. Present searches for KK axions make use of the decay channel, $a\to \gamma \gamma$, for which we revise the event rate; our value lies orders of magnitude below the rate usually quoted in the literature. This major conclusion stems from recent measurements of the luminosity of the quiet Sun which acts as an irreducible limit. The revised model remains a viable and an attractive explanation for multiple astrophysical observations, and we propose several approaches to search for solar KK axions in the near future.

    hep-phastro-ph.HEJCAP(2021)·19 citations
16. 16*

    High-energy logarithmic corrections to the QCD component of same-sign W-pair production

    Jeppe R. Andersen🇬🇧 · Bertrand Ducloué🇬🇧 · Conor Elrick🇬🇧 · Andreas Maier🇩🇪 · Graeme Nail🇬🇧 · Jennifer M. Smillie🇬🇧

    We describe the calculation of the QCD contribution to same-sign $W$-pair production, $pp\to e^{\pm }{\nu }_e{\mu }^{\pm }{\nu }_{\mu }jj$, resumming all contributions scaling as ${\alpha }_W^4{\alpha }_s^{2+k}{\log }^k(\hat{s}/p_{\perp }^2)$ [arXiv:2107.06818]. These leading logarithmic contributions are enhanced by typical cuts used for Vector Boson Scattering (VBS) studies. We show that while the cross sections are little affected by these corrections, other more exclusive observables relevant for experimental studies are affected more significantly.

    hep-phSciPost Phys.Proc.(2022)·0 citations
17. 17*

    Axion-philic cosmological moduli

    Kwang Sik Jeong🇰🇷 · Wan Il Park🇰🇷

    We show that string moduli have axion-philic nature owing to the model-insensitive derivative interactions arising from the Kaehler potential. The decay of a modulus into stringy axions occurs without suppression by the mass of final states. Interestingly, it turns out to hold in general not only for the scalar partner of the stringy axion but also for any other moduli. The decay into (pseudo) Nambu-Goldstone bosons (NGBs) also avoids such mass suppression if the modulus is lighter than or similar in mass to the scalar partner of the NGB. Such axion-philic nature makes string moduli a natural source of an observable amount of dark radiation in string compactifications involving ultralight stringy axions, and possibly in extensions of the Standard Model that include a cosmologically stable NGB such as the QCD axion. In the latter case, the fermionic superpartner of the NGB can also contribute to the dark matter as a feebly interacting massive particle.

    hep-phPRD(2021)·7 citations
18. 18*

    The role of right-handed neutrinos in $b\to c\tau (\pi {\nu }_{\tau },\rho {\nu }_{\tau },\mu {\bar{\nu }}_{\mu }{\nu }_{\tau }){\bar{\nu }}_{\tau }$ from visible final-state kinematics

    N. Penalva🇪🇸 · E. Hernández🇪🇸 · J. Nieves🇪🇸

    In the context of lepton flavor universality violation (LFUV) studies, we fully derive a general tensor formalism to investigate the role that left- and right-handed neutrino new-physics (NP) terms may have in $b\to c\tau {\bar{\nu }}_{\tau }$ transitions. We present, for several extensions of the Standard Model (SM), numerical results for the ${\Lambda }_b\to {\Lambda }_c\tau {\bar{\nu }}_{\tau }$ semileptonic decay, which is expected to be measured with precision at the LHCb. This reaction can be a new source of experimental information that can help to confirm, or maybe rule out, LFUV presently seen in $\bar{B}$ meson decays. The present study analyzes observables that can help in distinguishing between different NP scenarios that otherwise provide very similar results for the branching ratios, which are our currently best hints for LFUV. Since the $\tau$ lepton is very short-lived, we consider three subsequent $\tau$-decay modes, two hadronic $\pi {\nu }_{\tau }$ and $\rho {\nu }_{\tau }$ and one leptonic $\mu {\bar{\nu }}_{\mu }{\nu }_{\tau }$, which have been previously studied for $\bar{B}\to D^{(\ast )}$ decays. Within the tensor formalism that we have developed in previous works, we re-obtain the expressions for the differential decay width written in terms of visible (experimentally accessible) variables of the massive particle created in the $\tau$ decay. There are seven different $\tau$ angular and spin asymmetries that are defined in this way and that can be extracted from experiment. Those asymmetries provide observables that can help in constraining possible SM extensions.

    hep-phJHEP(2021)·27 citations
19. 19*

    Exclusive production of $\rho$-mesons in high-energy factorization at HERA and EIC

    Andrèe Dafne Bolognino🇮🇹 · Francesco Giovanni Celiberto🇮🇹 · Dmitry Yu. Ivanov🇷🇺 · Alessandro Papa🇮🇹 · Wolfgang Schäfer🇵🇱 · Antoni Szczurek🇵🇱

    We calculate cross sections for the exclusive diffractive leptoproduction of $\rho$-mesons, ${\gamma }^{\ast }p\to \rho p$, within the framework of high-energy factorization. Cross sections for longitudinally and transversally polarized mesons are shown. We employ a wide variety of unintegrated gluon distributions available in the literature and compare to HERA data. The resulting cross sections strongly depend on the choice of unintegrated gluon distribution. We also present predictions for the proton target in the kinematics of the Brookhaven EIC.

    hep-phEPJC(2021)·81 citations
20. 20*

    NLO inclusive $J/\psi$ photoproduction at large $P_T$ at HERA and the EIC

    Carlo Flore🇫🇷 · Jean-Philippe Lansberg🇫🇷 · Hua-Sheng Shao🇫🇷 · Yelyzaveta Yedelkina🇫🇷

    We study inclusive $J/\psi$ photoproduction at NLO at large $P_T$ at HERA and the EIC. Our computation includes NLO QCD leading-$P_T$ corrections, QED contributions via an off-shell photon as well as those from $J/\psi$+charm channels. For the latter, we employ the variable-flavour-number scheme. Our results are found to agree with the latest HERA data by H1 and provide, for the first time, a reliable estimate of the EIC reach for such a measurement. Finally, we demonstrate the observability of $J/\psi$+charm production and the sensitivy to probe the non-perturbative charm content of the proton at high $x$, also known as intrinsic charm, at the EIC.

    hep-phhep-exnucl-thSciPost Phys.Proc.(2022)·2 citations
21. 21*

    Higgs potential in gauge-Higgs unification with a flat extra dimension

    Mitsuru Kakizaki🇯🇵 · Shin Suzuki🇯🇵

    We analyze the structure of the Higgs potential in gauge-Higgs unification with a flat extra dimension. As a concrete model, we first consider the cases where the Standard Model Higgs doublet is embedded into a higher-dimensional $SU(3{)}_w^{}$ gauge multiplet with five-dimensional Lorentz symmetry relaxed. In this $SU(3{)}_w^{}$ model with Lorentz violation, the deviation of the resulting triple Higgs boson coupling from its SM prediction is shown to be less than $10\%$ when the compactification scale is larger than the experimental lower bound, which is around 5 TeV. Next, we examine the Higgs potential in other similar gauge-Higgs unification models with a flat extra dimension. It is pointed out that even in such models the shape of the Higgs potential around the vacuum quickly approaches that of the minimal Higgs potential with one Higgs doublet as the compactification scale of the extra dimension increases. An observable deviation of the triple Higgs boson coupling at planned lepton colliders will necessitate significant extensions of such gauge-Higgs unification models.

    hep-phPLB(2021)·3 citations
22. 22*

    A spectator-model way to transverse-momentum-dependent gluon distribution functions

    Alessandro Bacchetta🇮🇹 · Francesco Giovanni Celiberto🇮🇹 · Marco Radici🇮🇹 · Pieter Taels🇫🇷

    We present exploratory analyses of the 3D gluon content of the proton via a study of unpolarized and polarized gluon TMDs at twist-2, calculated in a spectator model for the parent nucleon. Our approach embodies a flexible parametrization for the spectator-mass function, suited to describe both moderate and small-$x$ effects. All these studies can serve as a useful guidance in the investigation of the gluon dynamics inside nucleons and nuclei, which constitutes one of the major goals of new-generation colliding machines, as the EIC, the HL-LHC, NICA, and the FPF.

    hep-phSciPost Phys.Proc.(2022)·37 citations
23. 23*

    Reconstructing QCD Spectral Functions with Gaussian Processes

    Jan Horak🇩🇪 · Jan M. Pawlowski🇩🇪 · José Rodríguez-Quintero🇪🇸 · Jonas Turnwald🇩🇪 · Julian M. Urban🇩🇪 · Nicolas Wink🇩🇪 · Savvas Zafeiropoulos🇫🇷

    We reconstruct ghost and gluon spectral functions in 2+1 flavor QCD with Gaussian process regression. This framework allows us to largely suppress spurious oscillations and other common reconstruction artifacts by specifying generic magnitude and length scale parameters in the kernel function. The Euclidean propagator data are taken from lattice simulations with domain wall fermions at the physical point. For the infrared and ultraviolet extensions of the lattice propagators as well as the low-frequency asymptotics of the ghost spectral function, we utilize results from functional computations in Yang-Mills theory and QCD. This further reduces the systematic error significantly. Our numerical results are compared against a direct real-time functional computation of the ghost and an earlier reconstruction of the gluon in Yang-Mills theory. The systematic approach presented in this work offers a promising route towards unveiling real-time properties of QCD.

    hep-phhep-lathep-thPRD(2022)·109 citations
24. 24*

    Vector dark matter production from catalyzed annihilation

    Chengfeng Cai🇨🇳 · Hong-Hao Zhang🇨🇳

    We provide a simple model of vector dark matter (DM) which can realize the recently proposed freeze-out mechanism with catalyzed annihilation. In our setup, a vector DM field $X_{\mu }$ and a catalyst field $C_{\mu }$ is unified by an SU(2)${}_D$ gauge symmetry. These gauge fields acquire their masses via spontaneously symmetry breaking triggered by a doublet and a real triplet scalar fields. The catalyst particle is automatically lighter than the DM since it only acquires mass from the vacuum expectation value of the doublet scalar. We also introduce a dimension-5 operator to generate a kinetic mixing term between $C_{\mu }$ and the U(1)${}_Y$ gauge field $B_{\mu }$. This mixing term is naturally small due to a suppression with a high UV completion scale, and thus it allows the catalyst to decay after the DM freeze-out. We derive the annihilation cross sections of processes $X^{\ast }+X\to 2C$ and $3C\to X^{\ast }+X$ and solve the Boltzmann equations for both the DM and the catalyst. We develop the analytical approximate solutions of the equations and find them matching the numerical solutions well. Constraints from relic abundance and indirect detection of DM are considered. We find that the DM with a mass $m_X\gtrsim 4.5$~TeV survives in the case of a long-living catalyst. On the other hand, if the catalyst decays during the catalyzed annihilation era, then the bound can be released. We also discuss two paradigms which can maintain the kinetic equilibrium of DM until the DM freeze-out. In both cases, the freeze-out temperature of DM is an order of magnitude higher than the original model.

    hep-phastro-ph.COJHEP(2022)·8 citations
25. 25*

    Resummation for $tqH$ production

    Matthew Forslund🇺🇸 · Nikolaos Kidonakis🇺🇸

    We present results with soft-gluon resummation for the associated production of a single top quark and a Higgs boson. We present analytical results for the higher-order soft-gluon corrections and numerical results for the total cross section and top-quark transverse momentum and rapidity distributions at LHC energies.

    hep-phSciPost Phys.Proc.(2022)·2 citations
26. 26*

    Constraints imposed by the partial wave amplitudes on the decays of $J=1,2$ mesons

    Vanamali Shastry🇵🇱 · Enrico Trotti🇵🇱 · Francesco Giacosa🇵🇱

    We study the two-body decays of mesons using the covariant helicity formalism. In particular, we show how the partial wave analysis of decays constrains the interacting terms entering the Lagrangian describing the decays of mesons with $J=1$ and $J=2$. We use available information on partial wave analysis to study specific mesonic decays and to make predictions for not yet measured quantities as well as to investigate the isoscalar mixing angle in the axial-vector, pseudovector and pseudotensor sectors. In particular, in the axial-vector sector our result agrees with the LHCb one, and in the pseudotensor sector we confirm a quite large (and negative) angle in the nonstrange-strange basis, which is compatible with a large contribute of the axial anomaly.

    hep-phPRD(2022)·15 citations
27. 27*

    Muonic vs electronic dark forces: a complete EFT treatment for atomic spectroscopy

    Claudia Frugiuele🇮🇹 · Clara Peset🇩🇪

    Precision atomic spectroscopy provides a solid model independent bound on the existence of new dark forces among the atomic constituents. We focus on the keV-GeV region investigating the sensitivity to such dark sectors of the recent measurements on muonic atoms at PSI. To this end we develop for the first time, the effective field theory that describes the leading effect of a new (pseudo-)vector or a (pseudo-)scalar particle of any mass at atomic energies. We identify in the Lamb Shift measurement in muonic deuterium ($\mu$D) and the $2s$ Hyperfine Splitting (HFS) in muonic hydrogen ($\mu$H) the most promising measurements to probe respectively spin-independent and spin-dependent new forces. Furthermore, we evaluate the expression of the vector force HFS finding that a future measurement of the $2s$ HFS in regular hydrogen could provide the strongest atomic bound for such a force for masses above 100 MeV.

    hep-phphysics.atom-phJHEP(2022)·23 citations
28. 28*

    LUXE-NPOD: new physics searches with an optical dump at LUXE

    Zhaoyu Bai🇨🇳 · Thomas Blackburn🇸🇪 · Oleksandr Borysov🇩🇪 · Oz Davidi🇮🇱 · Anthony Hartin🇬🇧 · Beate Heinemann🇩🇪 · Teng Ma🇮🇱 · Gilad Perez🇮🇱 · Arka Santra🇮🇱 · Yotam Soreq🇮🇱 · Noam Tal Hod🇮🇱

    We propose a novel way to search for feebly interacting massive particles, exploiting two properties of systems involving collisions between high energy electrons and intense laser pulses. The first property is that the electron-intense-laser collision results in a large flux of hard photons, as the laser behaves effectively as a thick medium. The second property is that the emitted photons free-stream inside the laser and thus for them the laser behaves effectively as a very thin medium. Combining these two features implies that the electron-intense-laser collision is an apparatus which can efficiently convert UV electrons to a large flux of hard, co-linear photons. We further propose to direct this unique large and hard flux of photons onto a physical dump which in turn is capable of producing feebly interacting massive particles, in a region of parameters that has never been probed before. We denote this novel apparatus as ``optical dump'' or NPOD (new physics search with optical dump). The proposed LUXE experiment at Eu.XFEL has all the required basic ingredients of the above experimental concept. We discuss how this concept can be realized in practice by adding a detector after the last physical dump of the experiment to reconstruct the two-photon decay product of a new spin-0 particle. We show that even with a relatively short dump, the search can still be background free. Remarkably, even with a 40 TW laser, which corresponds to the initial run, and definitely with a 350 TW laser, of the main run with one year of data taking, LUXE-NPOD will be able to probe uncharted territory of both models of pseudo-scalar and scalar fields, and in particular probe natural of scalar theories for masses above 100 MeV.

    hep-phhep-exPRD(2022)·67 citations
29. 29*

    Flavor $SU(3)$ in Cabibbo-favored $D$-meson decays

    Bhubanjyoti Bhattacharya🇺🇸 · Alakabha Datta🇺🇸 · Alexey A. Petrov🇺🇸 · John Waite🇺🇸

    Model-independent description of nonleptonic decays of charmed mesons is a challenging task due to large nonperturbative effects of strong interactions on the transition amplitudes. We discuss the equivalence of two different flavor-$SU(3)$-based descriptions of Cabibbo-favored non-leptonic decays of charmed mesons to two-pseudoscalars final states including the $\eta$ and ${\eta }^{\prime }$ mesons.

    hep-phhep-exJHEP(2021)·7 citations
30. 30*

    $t\bar{t}t\bar{t}$ signatures through the lens of color-octet scalars

    Linda M. Carpenter🇺🇸 · Taylor Murphy🇺🇸 · Matthew J. Smylie🇺🇸

    We reinterpret two recent LHC searches for events containing four top quarks ($t\bar{t}t\bar{t}$) in the context of supersymmetric models with Dirac gauginos and color-octet scalars (sgluons). We explore whether sgluon contributions to the four-top production cross section $\sigma (pp\to t\bar{t}t\bar{t})$ can accommodate an excess of four-top events recently reported by the ATLAS collaboration. We also study constraints on these models from an ATLAS search for new phenomena with jets and missing transverse energy ($E_{\text{T}}^{\text{miss}}$) sensitive to signals with four top quarks. We find that these two analyses provide complementary constraints, with the jets + $E_{\text{T}}^{\text{miss}}$ search exceeding the four-top cross section measurement in sensitivity for sgluons heavier than about 800 GeV. We ultimately find that either a scalar or a pseudoscalar sgluon can currently fit the ATLAS excess in a range of reasonable benchmark scenarios, though a pseudoscalar in minimal Dirac gaugino models is ruled out. We finally offer sensitivity projections for these analyses at the HL-LHC, mapping the $5\sigma$ discovery potential in sgluon parameter space and computing exclusion limits at 95% CL in scenarios where no excess is found.

    hep-phJHEP(2022)·11 citations
31. 31*

    Probing Secret Interactions of Astrophysical Neutrinos in the High-Statistics Era

    Ivan Esteban🇺🇸 · Sujata Pandey🇮🇳 · Vedran Brdar🇺🇸 · John F. Beacom🇺🇸

    Do neutrinos have sizable self-interactions? They might. Laboratory constraints are weak, so strong effects are possible in astrophysical environments and the early universe. Observations with neutrino telescopes can provide an independent probe of neutrino self ("secret") interactions, as the sources are distant and the cosmic neutrino background intervenes. We define a roadmap for making decisive progress on testing secret neutrino interactions governed by a light mediator. This progress will be enabled by IceCube-Gen2 observations of high-energy astrophysical neutrinos. Critical to this is our comprehensive treatment of the theory, taking into account previously neglected or overly approximated effects, as well as including realistic detection physics. We show that IceCube-Gen2 can realize the full potential of neutrino astronomy for testing neutrino self-interactions, being sensitive to cosmologically relevant interaction models. To facilitate forthcoming studies, we release nuSIProp, a code that can also be used to study neutrino self-interactions from a variety of sources.

    hep-phastro-ph.COastro-ph.HEhep-exPRD(2021)·83 citations
32. 32*

    First-Generation New Physics in Simplified Models: From Low-Energy Parity Violation to the LHC

    Andreas Crivellin🇨🇭 · Martin Hoferichter🇨🇭 · Matthew Kirk🇮🇹 · Claudio Andrea Manzari🇨🇭 · Luc Schnell🇫🇷

    New-physics (NP) constraints on first-generation quark-lepton interactions are particularly interesting given the large number of complementary processes and observables that have been measured. Recently, first hints for such NP effects have been observed as an apparent deficit in first-row CKM unitarity, known as the Cabibbo angle anomaly, and the CMS excess in $q\bar{q}\to e^{+}{e}^{-}$. Since the same NP would inevitably enter in searches for low-energy parity violation, such as atomic parity violation, parity-violating electron scattering, and coherent neutrino-nucleus scattering, as well as electroweak precision observables, a combined analysis is required to assess the viability of potential NP interpretations. In this article we investigate the interplay between LHC searches, the Cabibbo angle anomaly, electroweak precision observables, and low-energy parity violation by studying all simplified models that give rise to tree-level effects related to interactions between first-generation quarks and leptons. Matching these models onto Standard Model effective field theory, we derive master formulae in terms of the respective Wilson coefficients, perform a complete phenomenological analysis of all available constraints, point out how parity violation can in the future be used to disentangle different NP scenarios, and project the constraints achievable with forthcoming experiments.

    hep-phhep-exnucl-exnucl-thJHEP(2021)·75 citations
33. 33*

    Axion Dark Matter in the Time of Primordial Black Holes

    Nicolás Bernal🇨🇴 · Fazlollah Hajkarim🇮🇹 · Yong Xu🇩🇪

    We investigate the production of QCD axion dark matter in a nonstandard cosmological era triggered by primordial black holes (PBHs) that fully evaporate before the onset of BBN. Even if PBHs cannot emit the whole axion cold dark matter abundance through Hawking radiation, they can have a strong impact on the dark matter produced via the misalignment mechanism. First, the oscillation temperature of axions reduces if there is a PBH dominated era, and second, PBH evaporation injects entropy to the standard model, diluting the axion relic abundance originally produced. The axion window is therefore enlarged, reaching masses as light as $\sim 10^{-8}$ eV and decay constants as large as $f_a\sim 10^{14}$ GeV without fine tuning the misalignment angle. Such small masses are in the reach of future detectors as ABRACADABRA, KLASH, and ADMX, if the axion couples to photons. Additionally, the axions radiated by PBHs contribute to $\Delta N_{\text{eff}}$ within the projected reach of the future CMB Stage 4 experiment.

    hep-phPRD(2021)·77 citations
34. 34*

    Conformal Windows beyond Asymptotic Freedom

    Andrew D. Bond🇬🇧 · Daniel F. Litim🇬🇧 · Gustavo Medina Vazquez🇬🇧

    We study four-dimensional gauge theories coupled to fermions in the fundamental and meson-like scalars. All requisite beta functions are provided for general gauge group and fermion representation. In the regime where asymptotic freedom is absent, we determine all interacting fixed points using perturbation theory up to three loop in the gauge and two loop in the Yukawa and quartic couplings. We find that the conformal window of ultraviolet fixed points is narrowed-down by finite-$N$ corrections beyond the Veneziano limit. We also find a new infrared fixed point whose main features such as scaling exponents, UV-IR connecting trajectories, and phase diagram are provided. Both fixed points collide upon varying the number of fermion flavours $N_{\mathrm{f}}$, and conformality is lost through a saddle-node bifurcation. We further revisit the prospect for ultraviolet fixed points in the large $N_{\mathrm{f}}$ limit where matter field fluctuations dominate. Unlike at weak coupling, we do not find clear evidence for new scaling solutions even in the presence of scalar and Yukawa couplings.

    ↳ hep-thhep-phPRD(2021)·20 citations
35. 35*

    Kaon and pion maximal emission times extraction from the femtoscopy analysis of $5.02A$ TeV LHC collisions within the integrated hydrokinetic model

    V. M. Shapoval🇺🇦 · Yu. M. Sinyukov🇺🇦

    A simple method for the extraction of the times of maximal emission for kaons and pions using the combined fitting of their transverse momentum spectra and the longitudinal interferometry radii dependencies on the pair transverse mass $m_T$ is applied to Pb+Pb collisions at the LHC energy $\sqrt{s_{NN}}=5.02$ TeV. The method is based on the analytical formulas, that were earlier successfully utilized in the studies of Pb+Pb collisions at $\sqrt{s_{NN}}=2.76$ TeV. To test the method, the spectra, radii and particle radiation picture are calculated within the integrated hydrokinetic model (iHKM), that includes all the stages of the matter evolution in high-energy A+A collisions: the system's formation, its thermalization, viscous hydrodynamics evolution, particlization and subsequent hadronic cascade. The model describes and predicts well already published LHC data in "soft physics? kinematic region. Thus, the fitting results for maximal emission times of kaons and pions are compared to the approximate maximal emission time values, estimated based on the emission function plots, obtained in iHKM. The developed simple method is intended for use in experimental analysis of femtoscopy data in relativistic A+A collisions.

    ↳ nucl-thhep-phNPA(2021)·7 citations
36. 36*

    ${\Lambda }_c\to {\Lambda }^{\ast }(1520)$ form factors from lattice QCD and improved analysis of the ${\Lambda }_b\to {\Lambda }^{\ast }(1520)$ and ${\Lambda }_b\to {\Lambda }_c^{\ast }(2595,2625)$ form factors

    Stefan Meinel🇺🇸 · Gumaro Rendon🇺🇸

    We present the first lattice-QCD calculation of the form factors governing the charm-baryon semileptonic decays ${\Lambda }_c\to {\Lambda }^{\ast }(1520){\ell }^{+}{\nu }_{\ell }$. As in our previous calculation of the ${\Lambda }_b\to {\Lambda }^{\ast }(1520)$ form factors, we work in the ${\Lambda }^{\ast }(1520)$ rest frame, but here we use four different heavy-baryon momenta instead of just two. Because of the lower mass of the ${\Lambda }_c$, the moderately-sized momenta used here are sufficient to determine the form factors in the full kinematic range of the semileptonic decay. We also update the analysis of our lattice results for the ${\Lambda }_b\to {\Lambda }^{\ast }(1520)$ and ${\Lambda }_b\to {\Lambda }_c^{\ast }(2595,2625)$ form factors by imposing exact relations among the different form factors at zero recoil that follow from rotational symmetry. Imposing these relations ensures the correct behavior of the angular observables near the endpoint.

    ↳ hep-lathep-exhep-phnucl-thPRD(2022)·64 citations
37. 37*

    Lattice QCD study of the elastic and transition form factors of charmed baryons

    Kadir Utku Can🇦🇺

    I review the progress made in calculating the elastic and transition form factors of charmed baryons from lattice simulations.

    ↳ hep-lathep-phInt.J.Mod.Phys.A(2021)·15 citations
38. 38*

    Electromagnetic interaction of low transverse momentum electrons and positrons with heavy nuclei in ultra-peripheral ultra-relativistic heavy-ion collisions

    Katarzyna Mazurek🇵🇱 · Mariola Kłusek-Gawenda🇵🇱 · Antoni Szczurek🇵🇱

    The photon-photon interaction in ultra-relativistic heavy-ion collision is a source of the $(e^{+},e^{-})$ pairs. The photon-photon fusion leads the lepton creation in the broad configuration space around "collision" point. Those created close to heavy nuclei may undergo strong interaction with them. The impact parameter space distribution of electrons and positrons are calculated within the b-space EPA model of such collisions. The evolution due to the electromagnetic interaction of $(e^{+},e^{-})$ with nuclei is studied, and the distortion of rapidity and transverse momentum distributions are shown. We show first exploratory results for the reaction Pb+Pb at $\sqrt{s_{NN}}=$ 17.3 GeV (SPS) and 200 GeV (RHIC) energies. We provide results for selected creation points and when integrating over their position as dictated by the $b$-space EPA model. We observe strong effects at low transverse momenta, so far not measured regions of the phase space. In particular, we predict a possible sizeable accumulation of electrons with rapidities close to the beam rapidity. The EM effects lead to asymmetry in the production of electrons and positrons.

    ↳ nucl-thhep-phEPJA(2022)·5 citations
39. 39*

    Clarifying transfer function approximations for the large-scale gravitational wave background in $\Lambda$CDM

    Thomas Kite🇬🇧 · Jens Chluba🇬🇧 · Andrea Ravenni🇬🇧 · Subodh P. Patil🇳🇱

    The primordial gravitational wave background (GWB) offers an exciting future avenue of discovery for new physics. Its information content encodes multiple eras in the early Universe's history, corresponding to many orders of magnitude in frequency and physical scale to be measured today. By numerically solving for the GW transfer functions we provide simple yet accurate formulas describing the average power of the large-scale energy spectrum of the GWB for arbitrary primordial tensor power spectra. In doing so we can pedagogically explain and clarify previous GWB literature, highlight the important cosmological parameters of various GWB features, and reveal multiple ways in which cancelling conceptual errors can give deceptively accurate results. The scales considered here are particularly important for CMB probes of the GWB, via $B$-modes and spectral distortions. In particular, we carefully study the effects of both neutrino damping, and the precise nature of the transition between the radiation-dominated (RD) and matter-dominated (MD) eras. A byproduct of numerically solving the problem is the ability to study the robustness of common approximations in the literature. Specifically, we show that a numerical treatment is especially important around the RD--MD transition, and for a brief moment of history where neutrino damping occurs during MD. In passing we also discuss the effects of late acceleration caused by dark energy -- showing that this can be neglected in most practical GWB applications -- and the effects of changing relativistic degrees of freedom on the GWB at very small-scales.

    ↳ astro-ph.COgr-qchep-phhep-thMNRAS(2021)·26 citations
40. 40*

    Impact of the leading-order short-range nuclear matrix element on the neutrinoless double-beta decay of medium-mass and heavy nuclei

    Lotta Jokiniemi🇪🇸 · Pablo Soriano🇪🇸 · Javier Menéndez🇪🇸

    We evaluate the leading-order short-range nuclear matrix element for the neutrinoless double-beta ($0\nu \beta \beta$) decay of the nuclei most relevant for experiments, including ${}^{76}$Ge, ${}^{100}$Mo, ${}^{130}$Te and ${}^{136}$Xe. In our calculations, performed with the nuclear shell model and proton-neutron quasiparticle random-phase approximation (pnQRPA) methods, we estimate the coupling of this term by the contact charge-independence-breaking coupling of various nuclear Hamiltonians. Our results suggest a significant impact of the short-range matrix element, which is about $15\%-50\%$ and $30\%-80\%$ of the standard $0\nu \beta \beta$-decay long-range matrix element for the shell model and pnQRPA, respectively. Combining the full matrix elements with the results from current $0\nu \beta \beta$-decay experiments we find that, if both matrix elements carry the same sign, these searches move notably toward probing the inverted mass ordering of neutrino masses.

    ↳ nucl-thhep-exhep-phnucl-exPLB(2021)·70 citations
41. 41*

    Bubble Bag End: A Bubbly Resolution of Curvature Singularity

    Ibrahima Bah🇺🇸 · Pierre Heidmann🇺🇸

    We construct a family of smooth charged bubbling solitons in ${\mathbb{M}}^4\times$T${}^2$, four-dimensional Minkowski with a two-torus. The solitons are characterized by a degeneration pattern of the torus along a line in ${\mathbb{M}}^4$ defining a chain of topological cycles. They live in the same parameter regime as non-BPS non-extremal four-dimensional black holes, and are ultra-compact with sizes ranging from miscroscopic to macroscopic scales. The six-dimensional framework can be embedded in type IIB supergravity where the solitons are identified with geometric transitions of non-BPS D1-D5-KKm bound states. Interestingly, the geometries admit a minimal surface that smoothly opens up to a bubbly end of space. Away from the solitons, the solutions are indistinguishable from a new class of singular geometries. By taking a limit of large number of bubbles, the soliton geometries can be matched arbitrarily close to the singular spacetimes. This provides the first classical resolution of a curvature singularity beyond the framework of supersymmetry and supergravity by blowing up topological cycles wrapped by fluxes at the vicinity of the singularity.

    ↳ hep-thgr-qchep-phJHEP(2021)·31 citations
42. 42*

    Thermalization dynamics of a gauge theory on a quantum simulator

    Zhao-Yu Zhou🇨🇳 · Guo-Xian Su🇨🇳 · Jad C. Halimeh🇮🇹 · Robert Ott🇩🇪 · Hui Sun🇨🇳 · Philipp Hauke🇮🇹 · Bing Yang🇩🇪 · Zhen-Sheng Yuan🇨🇳 · Jürgen Berges🇩🇪 · Jian-Wei Pan🇨🇳

    Gauge theories form the foundation of modern physics, with applications ranging from elementary particle physics and early-universe cosmology to condensed matter systems. We perform quantum simulations of the unitary dynamics of a U(1) symmetric gauge field theory and demonstrate emergent irreversible behavior. The highly constrained gauge theory dynamics is encoded in a one-dimensional Bose--Hubbard simulator, which couples fermionic matter fields through dynamical gauge fields. We investigate global quantum quenches and the equilibration to a steady state well approximated by a thermal ensemble. Our work may enable the investigation of elusive phenomena, such as Schwinger pair production and string-breaking, and paves the way for simulating more complex higher-dimensional gauge theories on quantum synthetic matter devices.

    ↳ cond-mat.quant-gascond-mat.stat-mechhep-lathep-ph+1Science(2022)·308 citations
43. 43*

    The Origin of Rest-mass Energy

    Fulvio Melia🇺🇸

    Today we have a solid, if incomplete, physical picture of how inertia is created in the standard model. We know that most of the visible baryonic `mass' in the Universe is due to gluonic back-reaction on accelerated quarks, the latter of which attribute their own inertia to a coupling with the Higgs field -- a process that elegantly and self-consistently also assigns inertia to several other particles. But we have never had a physically viable explanation for the origin of rest-mass energy, in spite of many attempts at understanding it towards the end of the nineteenth century, culminating with Einstein's own landmark contribution in his Annus Mirabilis. Here, we introduce to this discussion some of the insights we have garnered from the latest cosmological observations and theoretical modeling to calculate our gravitational binding energy with that portion of the Universe to which we are causally connected, and demonstrate that this energy is indeed equal to mc^2 when the inertia m is viewed as a surrogate for gravitational mass.

    ↳ gr-qcastro-ph.COhep-phEPJC(2021)·4 citations
44. 44*

    Recent advances in ADL, CutLang and adl2tnm

    Harrison B. Prosper🇺🇸 · Sezen Sekmen🇰🇷 · Gokhan Unel🇺🇸 · Arpon Paul🇮🇹

    This paper presents an overview and features of an Analysis Description Language (ADL) designed for HEP data analysis. ADL is a domain specific, declarative language that describes the physics content of an analysis in a standard and unambiguous way, independent of any computing frameworks. It also describes infrastructures that render ADL executable, namely CutLang, a direct runtime interpreter (originally also a language), and adl2tnm, a transpiler converting ADL into C++ code. In ADL, analyses are described in human readable plain text files, clearly separating object, variable and event selection definitions in blocks, with a syntax that includes mathematical and logical operations, comparison and optimisation operators, reducers, four-vector algebra and commonly used functions. Recent studies demonstrate that adapting the ADL approach has numerous benefits for the experimental and phenomenological HEP communities. These include facilitating the abstraction, design, optimization, visualization, validation, combination, reproduction, interpretation and overall communication of the analysis contents and long term preservation of the analyses beyond the lifetimes of experiments. Here we also discuss some of the current ADL applications in physics studies and future prospects based on static analysis and differentiable programming.

    ↳ physics.comp-phhep-phEPJ Web Conf.(2021)·2 citations
45. 45*

    Introducing $\text{NatPy}$, a simple and convenient Python module for dealing with natural units

    Tomas L. Howson🇦🇺 · Andre Scaffidi🇮🇹

    In high energy physics, the standard convention for expressing physical quantities is natural units. The standard paradigm sets $c=\hslash ={ϵ}_0=1$ and hence implicitly rescales all physical quantities that depend on unit derivatives of these quantities. We introduce $\text{NatPy}$, a simple Python module that defines user-friendly unit objects that can be used and converted within any predefined system of natural units. In this note, we will first introduce, then overview, the algebraic methods utilised by the $\text{NatPy}$ module.

    ↳ physics.gen-phhep-ph1 citation

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.