Fri·Jul 22, 2022Friday·July 22, 2022

1. 01*

   Azimuthal decorrelation between a jet and a Z boson at hadron colliders

   Hamza Bouaziz🇩🇿 · Yazid Delenda🇩🇿 · Kamel Khelifa-Kerfa🇩🇿

   We revisit the azimuthal decorrelation $\delta \varphi$ between a jet and a $Z$ boson produced at hadron colliders. Employing different recombination schemes for the jets leads to significantly different NLL-resummed predictions for the distribution of this quantity. Specifically when the jets are reconstructed with the $E$-scheme (i.e., four-momentum addition) in the $k_t$ or anti-$k_t$ clustering algorithms, then the resummation becomes highly non-trivial due to the presence of non-global and/or clustering logarithms. We evaluate these logarithms analytically at two loops and numerically to all orders in the large-${\mathrm{N}}_{\mathrm{c}}$ limit, and present a full NLL resummation of $\delta \varphi$. We extend the accuracy of the perturbative expansion of the resummed distribution at fixed order to NNLL accuracy by including $\mathcal{O}({\alpha }_s)$ NLO corrections obtained with MadGraph5_aMC@NLO. We compare our findings with results of various Monte Carlo event generators and with experimental data from the CMS collaboration.

   hep-phJHEP(2022)·18 citations
2. 02*

   Tackling the infamous $g^6$ term of the QCD pressure

   Pablo Navarrete🇨🇱 · York Schröder🇨🇱

   We report on ongoing efforts to tackle an important open problem in QCD thermodynamics, namely an evaluation of the pressure to order $g^6$ in a weak-coupling expansion, corresponding to four loops. In particular, we identify a class of contributing Feynman sum-integrals with lower-loop factors, describe the formalism to tensor decompose those, and manage to map them onto scalar master sum-integrals that have already been evaluated in the literature.

   hep-phnucl-thPoS(2022)·7 citations
3. 03*

   Gauge Coupling Unification in simplified Grand Gauge-Higgs Unification

   Nobuhito Maru🇯🇵 · Haruki Takahashi🇯🇵 · Yoshiki Yatagai🇯🇵

   Grand gauge-Higgs unification of five dimensional SU(6) gauge theory on an orbifold $S^1/Z_2$ with localized gauge kinetic terms is discussed. The Standard model (SM) fermions on the boundaries and some massive bulk fermions coupling to the SM fermions on the boundary are introduced. Taking the power-law running contributions from the bulk fields into account, perturbative gauge coupling unification is shown to be realized at around $10^{14}$ GeV, which is a few order smaller than the unification scale of four dimensional grand unified theories.

   hep-phhep-thPRD(2022)·15 citations
4. 04*

   Search for $e\to \tau$ Charged Lepton Flavor Violation at the EIC with the ECCE Detector

   J.-L. Zhang · S. Mantry · J. K. Adkins · Y. Akiba · A. Albataineh · M. Amaryan · I. C. Arsene · C. Ayerbe Gayoso · J. Bae · X. Bai · M.D. Baker · M. Bashkanov and 275 other authors

   The recently approved Electron-Ion Collider (EIC) will provide a unique new opportunity for searches of charged lepton flavor violation (CLFV) and other new physics scenarios. In contrast to the $e\leftrightarrow \mu$ CLFV transition for which very stringent limits exist, there is still a relatively large discovery space for the $e\to \tau$ CLFV transition, potentially to be explored by the EIC. With the latest detector design of ECCE (EIC Comprehensive Chromodynamics Experiment) and projected integral luminosity of the EIC, we find the $\tau$-leptons created in the DIS process $ep\to \tau X$ are expected to be identified with high efficiency. A first ECCE simulation study, restricted to the 3-prong $\tau$-decay mode and with limited statistics for the Standard Model backgrounds, estimates that the EIC will be able to improve the current exclusion limit on $e\to \tau$ CLFV by an order of magnitude.

   hep-phNucl.Instrum.Meth.A(2023)·23 citations
5. 05*

   Feasibility of searching for the Cabibbo-favored $D^{\ast }$ $\to$ $\bar{K}{\pi }^{+}$, ${\bar{K}}^{\ast }{\pi }^{+}$, $\bar{K}{\rho }^{+}$ decays

   Yueling Yang🇨🇳 · Kang Li🇨🇳 · Zhenglin Li🇨🇳 · Jinshu Huang🇨🇳 · Qin Chang🇨🇳 · Junfeng Sun🇨🇳

   The current knowledge on the $D^{\ast }$ mesons are still inadequate. Encouraged by the positive development prospects of high-luminosity and high-precision experiments, the Cabibbo-favored nonleptonic $D^{\ast }$ $\to$ $\bar{K}{\pi }^{+}$, ${\bar{K}}^{\ast }{\pi }^{+}$, $\bar{K}{\rho }^{+}$ weak decays are studied with the naive factorization approach. It is found that branching ratios of these processes can reach up to $\mathcal{O}(10^{-10})$ or more, and can be accessible at STCF, CEPC, FCC-ee and LHCb@HL-LHC experiments in the future. It might even be possible to search for the $D^{\ast 0}$ $\to$ $K^{\ast -}{\pi }^{+}$ and $K^{-}{\rho }^{+}$ decays at the running SuperKEKB experiments.

   hep-phhep-exPRD(2022)·4 citations
6. 06*

   Vacuum stability in the Standard Model with vector-like fermions

   Ash Arsenault🇨🇦 · Kivanc Y. Cingiloglu🇨🇦 · Mariana Frank🇨🇦

   The discovery of Standard-Model like Higgs at 125 GeV may raise more questions than the answers it provides. In particular, the hierarchy problem remains unsolved, and the Standard Model Higgs quartic self-coupling becomes negative below the Planck scale, necessitating new physics beyond the Standard Model. In this work we investigate a popular scenario, extensions of the Standard Model with vector-like fermion fields, such as the ones present in models with extra dimensions or in Higgs composite models, using a model independent approach. Since fermions decrease the Higgs quartic coupling at high energies, only exacerbating the self-coupling problem, we introduce first an additional scalar, which by itself is enough to overcome the vacuum stability limit, and then explore the effects of vector-like fermions in singlet, doublet and triplet representations. For each model, we identify the allowed fermion masses and mixing angles with the third family fermions required to satisfy the vacuum stability condition, and compare different representations. Allowed fermion masses emerge at around 1 TeV, raising hope that these will be found at the LHC. We also examine corrections to oblique parameters S and T from additional scalar and vector-like quarks which also impose constraints on mixing and mass splitting of both sectors., but these restrictions are relatively weak compared to the vacuum stability.

   hep-phPRD(2023)·21 citations
7. 07*

   Non-factorisable contributions to $t$-channel single-top production at the LHC and FCC

   Christian Brønnum-Hansen🇩🇪 · Jérémie Quarroz🇩🇪 · Chiara Signorile-Signorile🇩🇪 · Chen-Yu Wang🇩🇪

   Single top quark is mainly produced through the $t$-channel W boson exchange $q+b\to q^{\prime }+t$ at LHC. This process probes Wtb vertex directly and can be used to measure the CKM matrix element $V_{tb}$ or to constrain the bottom quark PDF. The non-factorisable contributions are the last missing piece of the NNLO corrections. In these proceedings, we discuss in a first part the ostensible importance of such corrections and the obtention of the different relevant amplitudes. In the second part, recently published results at the energy of the LHC are compared to new results for proton-proton collision at $100\mathrm{TeV}$, the energy of the FCC.

   hep-phPoS(2022)·3 citations
8. 08*

   Minimizing the phase structure of quark mass matrices

   Nikhila Awasthi🇮🇳 · Manoj Kumar🇮🇳 · Monika Randhawa🇮🇳 · Manmohan Gupta🇮🇳

   Fritzsch-Xing matrices are a particular class of texture 4 zero hermitian quark mass matrices, known to be successful in accommodating the quark mixing data. In the present work, it is shown that these texture 4-zero matrices with only one phase parameter, unlike the usually considered two phase parameters, are not only consistent with the latest experimental quark mixing data, but also predict the CP violation parameters, $J$ and corresponding phase $\delta$, in agreement with the recent global analyses. We also show that the mass matrix elements do not exhibit a strong hierarchy and there is a strong correlation between some of the mass matrix elements of up and down sector. A precision measurement of $\delta$ as well as small quark masses would have the potential to constrain the phase structure of the matrices further.

   hep-phEPJC(2022)·6 citations
9. 09*

   Radiatively generated fermion mass hierarchy from flavour non-universal gauge symmetries

   Gurucharan Mohanta🇮🇳 · Ketan M. Patel🇮🇳

   A framework based on a class of abelian gauge symmetries is proposed in which the masses of only the third generation quarks and leptons arise at the tree level. The fermions of the first and second families receive their masses through radiative corrections induced by the new gauge bosons in the loops. It is shown that the class of abelian symmetries which can viably implement this mechanism are flavour non-universal in nature. Taking the all-fermion generalization of the well-known leptonic $L_{\mu }-L_{\tau }$ and $L_e-L_{\mu }$ symmetries, we construct an explicit renormalizable model based on two $U(1)$ which is shown to reproduce the observed fermion mass spectrum of the Standard Model. The first and second generation fermion masses are loop suppressed while the hierarchy between these two generations results from a gap between the masses of two vector bosons of the extended gauge symmetries. Several phenomenological aspects of the flavourful new physics are discussed and lower limits on the masses of the vector bosons are derived.

   hep-phhep-thPRD(2022)·25 citations
10. 10*

    Multiparticle production in proton-nucleus collisions beyond eikonal accuracy

    Pedro Agostini🇪🇸 · Tolga Altinoluk🇵🇱 · Néstor Armesto🇪🇸 · Fabio Dominguez🇪🇸 · José Guilherme Milhano🇵🇹

    We study the effects on multigluon production at mid-rapidity in the Color Glass Condensate of the non-eikonal corrections that stem from relaxing the shockwave approximation and giving the target a finite size. We extend previous works performed in the dilute-dilute approximation suitable for proton-proton collisions, to the dilute-dense one applicable to proton-nucleus. We employ the McLerran-Venugopalan model for the projectile averages. For the target averages, we use the Golec-Biernat--Wüsthoff model and restrict to the leading contributions in overlap area that allow a factorization of ensembles of Wilson lines into products of dipoles. We make the connection with the jet quenching formalism and compare with previous results in the literature, providing a parametrization of the so-called decorated dipoles. We show that the non-eikonal effects on single inclusive particle production, contrary to what happens in jet quenching, are only sizable, of a few percent, for modest energies $\sqrt{s_{NN}}\le 100$ GeV and central rapidities. On the other hand, we find that the effects on double inclusive gluon production are larger for the same kinematics. We show that, as found previously in the dilute-dilute situation, non-eikonal corrections break the accidental symmetry in the CGC, allowing for the existence of non-vanishing odd azimuthal harmonics.

    hep-phnucl-thEPJC(2022)·26 citations
11. 11*

    First row CKM unitarity

    Chien-Yeah Seng🇩🇪

    In this talk I briefly review the precision test of the first row CKM unitarity, focusing mainly on $V_{ud}$ and $V_{us}$ extracted from pion, kaon, neutron and superallowed nuclear beta decays. I will discuss the current status of several important Standard Model theory inputs to these processes, and the need for future improvements.

    hep-phhep-exhep-latnucl-ex+13 citations
12. 12*

    Emergence of molecular-type characteristic spectrum of hidden-charm pentaquark with strangeness embodied in the $P_{\psi s}^{\Lambda }(4338)$ and $P_{cs}(4459)$

    Fu-Lai Wang🇨🇳 · Xiang Liu🇨🇳

    Inspired by the newly observed $P_{\psi s}^{\Lambda }(4338)$ and the reported $P_{cs}(4459)$, we indicate the existence of the molecular-type characteristic mass spectrum for hidden-charm pentaquark with strangeness. It shows that the $P_{cs}(4459)$ may contain two substructures corresponding to the ${\Xi }_c{\bar{D}}^{\ast }$ molecular states with $J^P=1/2^{-}$ and $3/2^{-}$, while there exists the corresponding ${\Xi }_c\bar{D}$ molecular state with $J^P=1/2^{-}$. As the prediction, we present another characteristic mass spectrum of the ${\Xi }_c^{\prime }{\bar{D}}^{(\ast )}$ molecular states. Experimental confirmation of these characteristic mass spectra is a crucial step of constructing hadronic molecular family.

    hep-phhep-exPLB(2022)·62 citations
13. 13*

    Revisiting big bang nucleosynthesis with a new particle species : effect of co-annihilation with nucleons

    Deep Ghosh🇮🇳

    In big bang nucleosynthesis (BBN), the light matter abundance is dictated by the neutron-to-proton ($n/p$) ratio which is controlled by the standard weak processes in the early universe. Here, we study the effect of an extra particle species ($\chi$) which \textit{co-annihilates} with neutron (proton), thereby potentially changing the ($n/p$) ratio in addition to the former processes. We find a novel interplay between the co-annihilation and the weak interaction in deciding the ($n/p$) ratio and the yield of $\chi$. Large co-annihilation strength ($G_D$) in comparison to the weak coupling ($G_F$), potentially can alter the number of nucleons in the thermal bath modifying the ($n/p$) ratio from its standard evolution. We find that the standard BBN prediction is restored for $G_D/G_F\lesssim 10^{-2}$, while the mass of $\chi$ being much smaller than the neutron mass. When the mass of $\chi$ is comparable to the neutron mass, we can allow large $G_D/G_F(\gtrsim 10^2)$ values, as the thermal abundance of $\chi$ becomes Boltzmann-suppressed. Therefore, the ($n/p$) ratio is restored to its standard value via dominant weak processes in later epochs. We also discuss the stability of the new particle in an effective theroy framework for co-annihilation. Further, the co-annihilation interaction generates elastic scattering of $\chi$ and nucleons at the next-to-leading order. This provides a way to probe the scenario in direct detection experiments, if $\chi$ is accidentally stable over cosmological timescale.

    hep-phastro-ph.COEPJC(2024)·3 citations
14. 14*

    New physics effects on ${\Lambda }_b\to {\Lambda }_c^{\ast }\tau {\bar{\nu }}_{\tau }$ decays

    Meng-Lin Du🇪🇸 · Neus Penalva🇪🇸 · Eliecer Hernández🇪🇸 · Juan Nieves🇪🇸

    We benefit from a recent lattice determination of the full set of vector, axial and tensor form factors for the ${\Lambda }_b\to {\Lambda }_c^{\ast }(2595)\tau {\bar{\nu }}_{\tau }$ and ${\Lambda }_c^{\ast }(2625)\tau {\bar{\nu }}_{\tau }$ semileptonic decays to study the possible role of these two reactions in lepton flavor universality violation studies. Using an effective theory approach, we analyze different observables that can be accessed through the visible kinematics of the charged particles produced in the tau decay, for which we consider the ${\pi }^{-}{\nu }_{\tau },{\rho }^{-}{\nu }_{\tau }$ and ${\mu }^{-}{\bar{\nu }}_{\mu }{\nu }_{\tau }$ channels. We compare the results obtained in the Standard Model and other schemes containing new physics (NP) interactions, with either left-handed or right-handed neutrino operators. We find a discriminating power between models similar to the one of the ${\Lambda }_b\to {\Lambda }_c$ decay, although somewhat hindered in this case by the larger errors of the ${\Lambda }_b\to {\Lambda }_c^{\ast }$ lattice form factors. Notwithstanding this, the analysis of these reactions is already able to discriminate between some of the NP scenarios and its potentiality will certainly improve when more precise form factors are available.

    hep-phPRD(2022)·13 citations
15. 15*

    Co-scattering in micrOMEGAs: a case study for the singlet-triplet dark matter model

    Gael Alguero🇫🇷 · Genevieve Belanger🇫🇷 · Sabine Kraml🇫🇷 · Alexander Pukhov🇷🇺

    In scenarios with very small dark matter (DM) couplings and small mass splittings between the DM and other dark sector particles, so-called "co-scattering" or "conversion-driven freeze-out" can be the dominant mechanism for DM production. We present the inclusion of this mechanism in micrOMEGAs together with a case study of the phenomenological implications in the fermionic singlet-triplet model. For the latter, we focus on the transition between co-annihilation and co-scattering processes. We observe that co-scattering is needed to describe the thermal behaviour of the DM for very small couplings, opening up a new region in the parameter space of the model. The triplet states are often long-lived in this region; we therefore also discuss LHC constraints from long-lived signatures obtained with SModelS.

    hep-phSciPost Phys.(2022)·48 citations
16. 16*

    Axions, WIMPs, proton decay and observable $r$ in $SO(10)$

    Nobuchika Okada🇺🇸 · Digesh Raut🇺🇸 · Qaisar Shafi🇺🇸

    We explore some experimentally testable predictions of an $SO(10)$ axion model which includes two 10-plets of fermions in order to resolve the axion domain wall problem. The axion symmetry can be safely broken after inflation, so that the isocurvature perturbations associated with the axion field are negligibly small. An unbroken gauge $Z_2$ symmetry in $SO(10)$ ensures the presence of a stable WIMP-like dark matter, a linear combination of the electroweak doublets in the fermion 10-plets and an $SO(10)$ singlet fermion with mass $\sim 62.5\mathrm{GeV}(1\mathrm{TeV})$ when it is mostly the singlet (doublet) fermion, that co-exists with axion dark matter. We also discuss gauge coupling unification, proton decay, inflation with non-minimal coupling to gravity and leptogenesis. With the identification of the SM singlet Higgs field in the $126$ representation of $SO(10)$ as inflaton, the magnetic monopoles are inflated away, and we find $0.963\lesssim n_s\lesssim 0.965$ and $0.003\lesssim r\lesssim 0.036$, where $n_s$ and $r$ denote the scalar spectral index and tensor-to-scalar ratio, respectively. These predictions can be tested in future experiments such as CMB-S4.

    hep-phEPJC(2023)·8 citations
17. 17*

    Neutrino masses and mixing in Minimal Inverse Seesaw using $A_4$ modular symmetry

    Jotin Gogoi🇮🇳 · Nayana Gautam🇮🇳 · Mrinal Kumar Das🇮🇳

    In this paper, we construct a model with the help of modular symmetry in the framework of minimal inverse seesaw [ISS(2,3)]. We have used $\Gamma (3)$ modular group which is isomorphic to non-Abelian discrete symmetry group $A_4$. In this group there are three Yukawa modular forms of weight 2. Through this model, we study neutrino masses and mixing for both normal and inverted hierarchy. Use of modular symmetry reduces the need for extra flavons and their specific VEV alignments, as such, minimality of the model is maintained to a great extent. Along with $A_4$ symmetry group, we have used $Z_3$ to restrict certain interaction terms in the Lagrangian. Further we calculate the effective mass to address the phenomena of neutrinoless double-beta decay ($0\nu \beta \beta$). The values of effective mass is found to lie within the bound ($m_{eff}<0.165$ eV) as predicted by different $0\nu \beta \beta$ experiments.

    hep-phInt.J.Mod.Phys.A(2023)·15 citations
18. 18*

    $\Lambda$ and $\bar{\Lambda }$ global polarization from the core-corona model

    Alejandro Ayala🇲🇽 · Isabel Domínguez🇲🇽 · Ivonne Maldonado🇷🇺 · Maria Elena Tejeda-Yeomans🇲🇽

    We report on work aimed to describe the $\Lambda$ and $\bar{\Lambda }$ global polarizations in a heavy-ion collision environment using the core-corona model, where the source of these hyperons is a high-density core and a less dense corona. We show that the overall properties of the polarization excitation functions can be linked to the relative abundance of $\Lambda$s and $\bar{\Lambda }$s coming from the core versus those coming from the corona. Both global polarizations peak at collision energies $\sqrt{s_{NN}}\lesssim 10$ GeV. The exact positions and heights of these peaks depend not only on a reversal of relative abundances with collision energy, but also on the centrality class, both related to the QGP volume and lifetime.

    hep-phnucl-thRev.Mex.Fis.Suppl.(2022)·6 citations
19. 19*

    $CP$ violation in $b\to s\ell \ell$: a model independent analysis

    Neetu Raj Singh Chundawat🇮🇳

    We perform a model-independent global fit to all germane and updated $b\to s\ell \ell$ ($\ell =e,\mu$) data assuming new physics couplings to be complex. Under the approximation that new physics universally affects muon and electron sectors and that either one or two related operators contribute at a time, we identify scenarios which provide a good fit to the data. It turns out that the favored scenarios remain the same as obtained for the real fit. Further, the magnitude of complex couplings can be as large as that of their real counterparts and these are reflected in the predictions of the direct $CP$ asymmetry, $A_{\mathrm{CP}}$, in $B\to (K,K^{\ast }){\mu }^{+}{\mu }^{-}$ along with a number of angular $CP$ asymmetries, $A_i$, in $B^0\to K^{\ast 0}{\mu }^{+}{\mu }^{-}$ decay. The sensitivities of these observables to various solutions are different in the low and high-$q^2$ bins. We also determine observables which can serve as unique identifier for a particular new physics solution. Moreover, we examine correlations between $A_{\mathrm{CP}}$ and several $A_i$ observables. A precise measurement of $A_{\mathrm{CP}}$ and $A_i$ observables can not only confirm the existence of additional weak phases but can also enable unique determination of Lorentz structure of possible new physics in $b\to s{\mu }^{+}{\mu }^{-}$ transition.

    hep-phhep-exPRD(2023)·43 citations
20. 20*

    Affleck-Dine Leptogenesis with One Loop Neutrino Mass and strong CP

    Rabindra N. Mohapatra🇺🇸 · Nobuchika Okada🇺🇸

    We present a unified model that solves four major problems of the standard model i.e. neutrino masses, origin of matter, strong CP problem and dark matter using the framework of Affleck-Dine (AD) mechanism. The AD-field is responsible for inflation, origin of matter and neutrino masses which arise at the one loop level. Neutrino masses are therefore intimately connected to the baryon to photon ratio of the universe. The dark matter in the model is the axion field used to solve the strong CP problem. The model has a near massless Majorana fermion which contributes to $\Delta N_{\mathrm{eff}}\sim 0.1$ in the early universe, that can be tested in the upcoming CMB-S4 experiment

    hep-phPRD(2022)·10 citations
21. 21*

    The first string-derived eclectic flavor model with realistic phenomenology

    Alexander Baur🇩🇪 · Hans Peter Nilles🇩🇪 · Saul Ramos-Sanchez🇲🇽 · Andreas Trautner🇩🇪 · Patrick K.S.Vaudrevange🇩🇪

    Eclectic flavor groups arising from string compactifications combine the power of modular and traditional flavor symmetries to address the flavor puzzle. This top-down scheme determines the representations and modular weights of all matter fields, imposing strict constraints on the structure of the effective potential, which result in controlled corrections. We study the lepton and quark flavor phenomenology of an explicit, potentially realistic example model based on a T6/Z3xZ3 orbifold compactification of the heterotic string that gives rise to an Omega(2) eclectic flavor symmetry. We find that the interplay of flavon alignment and the localization of the modulus in the vicinity of a symmetry-enhanced point leads to naturally protected fermion mass hierarchies, favoring normal-ordered neutrino masses arising from a see-saw mechanism. We show that our model can reproduce all observables in the lepton sector with a small number of parameters and deliver predictions for so far undetermined neutrino observables. Furthermore, we extend the fit to quarks and find that Kaehler corrections are instrumental in obtaining a successful simultaneous fit to the quark and lepton sectors.

    hep-phhep-thJHEP(2022)·47 citations
22. 22*

    Thermal Transitions in Domain Wall AdS/QCD

    Nick Evans🇬🇧 · Jack Mitchell🇬🇧

    We study thermal transitions in a Domain Wall AdS/QCD model. The model is based on the D5/probe D7 system with a discontinuous mass profile which restricts chiral fermions to 3+1 dimensional domain walls. Fluctuations on the domain wall are dual to the quark mass and condensate and reveal the relation between domain wall separation and the quark mass. The massive quarks exhibit a second order thermal, meson melting transition. Witten's multi-trace prescription can be used to interpret these configurations as having a dynamical mass from a Nambu-Jona-Lasinio interaction - here the transition is first order. Confinement can be introduced into the gauge sector by compactifying one direction of the D5. Compactification induces chiral symmetry breaking and there is a first order thermal restoration transition. If an NJL interaction is also introduced then the confinement and chiral symmetry breaking scales can be separated.

    ↳ hep-thhep-phPRD(2022)·1 citation
23. 23*

    Cosmological prior for the $J$-factor estimation of dwarf spheroidal galaxies

    Shun'ichi Horigome🇯🇵 · Kohei Hayashi🇯🇵 · Shin'ichiro Ando🇳🇱

    Dark matter halos of dwarf spheroidal galaxies (dSphs) play important roles in dark matter detection. Generally we estimate the halo profile using a kinematical equation of dSphs but the halo profile has a large uncertainty because we have only a limited number of kinematical dataset. In this paper, we utilize cosmological models of dark matter subhalos to obtain better constraints on halo profile of dSphs. The constraints are realized as two cosmological priors: satellite prior, based on a semi-analytic model of the accretion history of subhalos and their tidal stripping effect, and stellar-to-halo mass relation prior, which estimates halo mass of a galaxy from its stellar mass using empirical correlations. In addition, we adopt a radial dependent likelihood function by considering velocity dispersion profile, which allows us to mitigate the parameter degeneracy in the previous analysis using a radial independent likelihood function with averaged dispersion. Using these priors, we estimate the squared dark matter density integrated over the region-of-interest (so-called $J$-factor) of 8 classical and 27 ultra-faint dSphs. Our method significantly decreases the uncertainty of $J$-factors (upto about $20\%$) compared to the previous radial independent analysis. We confirm the model dependence of $J$-factor estimates by evaluating Bayes factors of different model setups and find that the estimates are still stable even when assuming different cosmological models.

    ↳ astro-ph.COastro-ph.HEhep-phPRD(2023)·7 citations
24. 24*

    Primordial Black-Hole Dark Matter via Warm Natural Inflation

    Miguel Correa🇺🇸 · Mayukh R. Gangopadhyay🇮🇳 · Nur Jaman🇮🇳 · Grant J. Mathews🇺🇸

    We report on a study of the natural warm inflationary paradigm (WNI). We show two important new results arise in this model. One is that the observational constraints on the primordial power spectrum from the cosmic microwave background (CMB) can be satisfied without going beyond the Planck scale of the effective field theory. The second is that WNI can inevitably provide perfect conditions for the production of primordial black holes (PBHs) in the golden window of black-hole mass range ($10^{-16}-10^{-11}{M}_{\odot }$) where it can account for all of the the dark matter content of the universe while satisfying observational constraints.

    ↳ gr-qcastro-ph.COhep-phPLB(2022)·43 citations
25. 25*

    Nonrelativistic Transport Theory from Vorticity Dependent Quantum Kinetic Equation

    Ö.F. Dayi🇹🇷 · S.E. Gürleyen🇹🇷

    We study the three-dimensional transport theory of massive spin-1/2 fermions resulting from the vorticity dependent quantum kinetic equation. This quantum kinetic equation has been introduced to take account of noninertial properties of rotating coordinate frames. We show that it is the appropriate relativistic kinetic equation which provides the vorticity dependent semiclassical transport equations of the three-dimensional Wigner function components. We establish the semiclassical kinetic equations of a linearly independent set of components. By means of them, kinetic equations of the chiral scalar distribution functions are derived. They furnish the 3D kinetic theory which permits us to study the vector and axial vector current densities by focusing on the mass corrections to the chiral vortical and separation effects.

    ↳ hep-thhep-phPRD(2022)·1 citation
26. 26*

    SME Gravity: Structure and Progress

    Jay D. Tasson🇺🇸

    This proceedings contribution outlines the current structure of the gravity sector of the Standard-Model Extension and summaries recent progress in gravitational wave analysis.

    ↳ gr-qchep-ph1 citation
27. 27*

    Pseudorapidity Window Size Dependence of Multiplicity Fluctuations in High-Energy Collisions with System Size and Beam Energies

    Ashwini Kumar🇮🇳 · Gauri Devi🇮🇳 · B. K. Singh🇮🇳 · Bushra Ali🇮🇳 · Shakeel Ahmad🇮🇳

    An investigation of the critical behavior of strongly interacting QCD matter has been performed by analyzing fluctuation observables on event-by-event (ebe) basis measured in high-energy collision experiments. The fluctuation analysis is performed using nuclear interactions at different target sizes and at different colliding beam energies as a function of varying width of pseudorapidity interval. For the sake of comparison, event-by-event multiplicity fluctuations in hadronic and heavy-ion collisions (p-H, p-A and A-B) are studied within the framework of the Lund Monte Carlo based FRITIOF model. Charged particle multiplicity and the variance of the multiplicity distribution are estimated for the interactions involving different target sizes and beam momenta i.e., p-H, p-CNO, p-AgBr at 200A GeV/c and ${}^{16}$O-AgBr collisions at 14.6, 60 and 200A GeV/c. Further, multiplicity fluctuations are quantified in terms of intensive quantity, the scaled variances $\omega$ and the strongly intensive quantity ${\Sigma }_{FB}$ derived from the charged particle multiplicity and the width of the multiplicity distribution. Strongly intensive quantity ${\Sigma }_{FB}$ is a quantity of great significance to extract information about short and long-range multiplicity correlations. Furthermore, the collision centrality and centrality bin width dependent behavior of the multiplicity fluctuation have been examined in the framework of Lund Monte Carlo based FRITIOF model. Results based on the fluctuation analysis carried out in the present study are interpreted in terms of dynamics of collision process and the possibility of related QCD phase transition.

    ↳ nucl-exhep-phIJMPE(2022)·4 citations
28. 28*

    (Super)Universal Attractors and the de Sitter Vacua in String Landscape

    Omer Guleryuz🇹🇷

    In this work, we present an effective field theory for string inflation with spontaneously broken supersymmetry without generating any supersymmetric anti-de Sitter vacua. In that regard, we analyze the nilpotent superfields that effectively capture the physics of anti-D3 branes, and obtain the underlying pattern of universal attractors with a single parameter. Accordingly, we reveal a novel uplifting method by adding the same parameter as a complex contribution parallel to the decomposition of a superfield. Following that, we obtain an almost vanishing cosmological constant in a region where the inflationary attractors unify. Finally, we show that the introduction of nilpotent superfields drastically extends the string landscape for the de Sitter (swampland) conjecture, and the (super)universal attractors are in the string landscape in that respect.

    ↳ hep-thgr-qchep-phJCAP(2023)·12 citations
29. 29*

    Solving Scattering in N=4 Super-Yang-Mills Theory

    Nima Arkani-Hamed🇺🇸 · Lance J. Dixon🇺🇸 · Andrew J. McLeod🇨🇭 · Marcus Spradlin🇺🇸 · Jaroslav Trnka🇺🇸 · Anastasia Volovich🇺🇸

    As part of the Snowmass community planning exercise, we highlight an ongoing program of research into the structure of scattering amplitudes in N=4 super-Yang-Mills theory, particularly in the planar limit of a large number of colors. This theory sits at the nexus of a number of exciting topics in high-energy particle physics, including the AdS/CFT correspondence, conformal field theory, integrability, and string theory, and is believed to be exactly solvable in four dimensions. In many ways, planar N=4 super-Yang-Mills theory is the "hydrogen atom" of relativistic scattering: It has proven indispensable for learning about new geometrical formulations of quantum field theory, for exploring mathematical properties at high perturbative orders, and for developing powerful new computational methods that have found applicability in precision collider physics.

    ↳ hep-thhep-phSnowmass 2021·32 citations
30. 30*

    Astrophysical Tests of Dark Matter Self-Interactions

    Susmita Adhikari🇮🇳 · Arka Banerjee🇮🇳 · Kimberly K. Boddy🇺🇸 · Francis-Yan Cyr-Racine🇺🇸 · Harry Desmond🇬🇧 · Cora Dvorkin🇺🇸 · Bhuvnesh Jain🇺🇸 · Felix Kahlhoefer🇩🇪 · Manoj Kaplinghat🇺🇸 · Anna Nierenberg🇺🇸 · Annika H. G. Peter🇺🇸 · Andrew Robertson🇺🇸 · Jeremy Sakstein🇺🇸 · Jesús Zavala🇮🇸

    Self-interacting dark matter (SIDM) arises generically in scenarios for physics beyond the Standard Model that have dark sectors with light mediators or strong dynamics. The self-interactions allow energy and momentum transport through halos, altering their structure and dynamics relative to those produced by collisionless dark matter. SIDM models provide a promising way to explain the diversity of galactic rotation curves, and they form a predictive and versatile framework for interpreting astrophysical phenomena related to dark matter. This review provides a comprehensive explanation of the physical effects of dark matter self-interactions in objects ranging from galactic satellites (dark and luminous) to clusters of galaxies and the large-scale structure. The second major part describes the methods used to constrain SIDM models including current constraints, with the aim of advancing tests with upcoming galaxy surveys. This part also provides a detailed review of the unresolved small-scale structure formation issues and concrete ways to test simple SIDM models. The review is rounded off by a discussion of the theoretical motivation for self-interactions, degeneracies with baryonic and gravitational effects, extensions to the single-component elastic-interactions SIDM framework, and future observational and theoretical prospects.

    ↳ astro-ph.COastro-ph.GAhep-phRMP(2025)·179 citations

* 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.