Fri·Nov 29, 2019Friday·November 29, 2019

1. 01*

   Probing ALP-Sterile Neutrino Couplings at the LHC

   Alexandre Alves🇧🇷 · Alex G. Dias🇧🇷 · Diego D. Lopes🇧🇷

   In this work, prospects to probe an overlooked facet of axion-like particles (ALPs) -- their potential couplings to sterile neutrinos -- are presented. We found that mono-photon searches have the potential to constrain ALP couplings to sterile neutrinos when a new heavy scalar boosts the ALP decay yields. Working within an effective field theory (EFT) approach, we scan the parameters space to establish the reach of the 13 TeV LHC to probe such couplings. We found regions of the parameters space evading several experimental constraints that can be probed at the LHC. Moreover, a complementary role between the LHC and various experiments that search for axions and ALPs can be anticipated for models where ALPs interact with sterile neutrinos. We also present the UV realization of a model having an axion-like particle, a heavy scalar and sterile neutrinos whose parameters are spanned by our EFT approach. The proposed model contains a type of seesaw mechanism for generating masses for the active neutrinos along with sterile neutrinos involving the high energy scale of the spontaneous breaking of the global symmetry associated to the ALP. Some benchmark points of this model can be discovered at the 13 TeV LHC with 300 fb${}^{-1}$.

   hep-phJHEP(2020)·22 citations
2. 02*

   Prospects of light sterile neutrino searches in long-baseline neutrino oscillations

   Yakefu Reyimuaji🇨🇳 · Chun Liu🇨🇳

   The neutrino oscillation probabilities in vacuum and matter are discussed, considering the framework of three active and one light sterile neutrinos. We study in detail the rephasing invariants and CP asymmetry observables, and investigate the four-neutrino oscillations in long-baseline neutrino experiments, such as DUNE, NO$\nu$A and T2HK. Our results show that the matter effect enhances quite a significantly the oscillation probabilities of electron neutrino and electron antineutrino appearance channels within a certain energy range, while no considerable change arises in the CP asymmetry analysis due to the matter effect. Moreover, separation between the results with and without the sterile neutrino is not so significant and that is also affected by CP-violating phases. Comparing the results for these three experiments, all of them have similar features, nevertheless, sizes and separations of the oscillation probabilities in DUNE are bit larger.

   hep-phJHEP(2020)·17 citations
3. 03*

   Next-to-leading order QCD corrections to the production of $B_c$ and $B_c^{\ast }$ through $W^{+}$-boson decays

   Xu-Chang Zheng🇨🇳 · Chao-Hsi Chang🇨🇳 · Xing-Gang Wu🇨🇳 · Jun Zeng🇨🇳 · Xu-Dong Huang🇨🇳

   In this paper, we calculate the total decay widths for the $W^{+}$-boson decays, $W^{+}\to B_c+b+\bar{s}+X$ and $W^{+}\to B_c^{\ast }+b+\bar{s}+X$, up to next-to-leading order (NLO) accuracy within the framework of the nonrelativistic QCD theory. Both the fixed-order and the fragmentation approaches are adopted to do the calculation. Differential decay widths $d\Gamma /dz$ and $d\Gamma /d{s}_1$ are also given. We find that the NLO corrections are significant in those two $W^{+}$ decay channels. Our numerical results show that at the LHC, there are about $7.03\times 10^4$ $B_c$-meson events and $5.10\times 10^4$ $B_c^{\ast }$-meson events to be produced via the $W^{+}$-boson decays per operation year.

   hep-phPRD(2020)·11 citations
4. 04*

   Weak structure functions in ${\nu }_l-N$ and ${\nu }_l-A$ scattering with nonperturbative and higher order perturbative QCD effects

   F. Zaidi🇮🇳 · H. Haider🇺🇸 · M. Sajjad Athar🇮🇳 · S. K. Singh🇮🇳 · I. Ruiz Simo🇪🇸

   We study the effect of various perturbative and nonperturbative QCD corrections on the free nucleon structure functions ($F_{iN}^{WI}(x,Q^2);i=1-3$) and their implications in the determination of nuclear structure functions. The evaluation of the nucleon structure functions has been performed by using the MMHT 2014 PDFs parameterization, and the TMC and HT effects are incorporated following the works of Schienbein et al. and Dasgupta et al., respectively. These nucleon structure functions are taken as input in the determination of nuclear structure functions. The numerical calculations for the ${\nu }_l/{\bar{\nu }}_l-A$ DIS process have been performed by incorporating the nuclear medium effects like Fermi motion, binding energy, nucleon correlations, mesonic contributions, shadowing and antishadowing in several nuclear targets such as carbon, polystyrene scintillator, iron and lead which are being used in MINERvA, and in argon nucleus which is relevant for the ArgoNeuT and DUNE experiments. The differential scattering cross sections $\frac{d^2{\sigma }_A^{WI}}{dxdy}$ and $(\frac{d{\sigma }_A^{WI}}{dx}/\frac{d{\sigma }_{CH}^{WI}}{dx})$ have also been studied in the kinematic region of MINERvA experiment. The theoretical results are compared with the recent experimental data of MINERvA and the earlier data of NuTeV, CCFR, CDHSW and CHORUS collaborations. Moreover, a comparative analysis of the present results for the ratio $(\frac{d{\sigma }_A^{WI}}{dx}/\frac{d{\sigma }_{CH}^{WI}}{dx})$, and the results from the MC generator GENIE and other phenomenological models of Bodek and Yang, and Cloet et al., has been performed in the context of MINERvA experiment. The predictions have also been made for ${\bar{\nu }}_l-A$ cross section relevant for MINERvA experiment.

   hep-phnucl-thPRD(2020)·23 citations
5. 05*

   Tetraquark Properties at Large $N_{\mathrm{c}}$

   Wolfgang Lucha🇦🇹 · Dmitri Melikhov🇦🇹 · Hagop Sazdjian🇫🇷

   Considering quantum chromodynamics in the consistent limit of simultaneous correlated increase of the number of colours, $N_{\mathrm{c}}$, beyond bounds and decrease of the strong coupling to zero allows for solid statements about qualitative features of the class of "truly exotic" tetraquark mesons carrying four mutually distinct quark flavours. Consistency criteria extracted from correlation functions for two-ordinary-meson scattering suggest the existence of more than one such tetraquarks, at least, of two tetraquarks of identical quark-flavour content and large-$N_{\mathrm{c}}$ behaviour of the total decay widths but differing in, and hence discriminable by, their predominant decay modes into two conventional mesons. This pairwise appearance is in conflict with the unique variant of such a four-quark bound state arising from the binding of diquark and antidiquark to a tetraquark by the strong interactions.

   hep-phPoS(2019)·0 citations
6. 06*

   Is a WIMP explanation of the DAMA modulation effect still viable?

   Gaurav Tomar🇰🇷 · Sunghyun Kang🇰🇷 · Stefano Scopel🇰🇷 · Jong-Hyun Yoon🇫🇮

   We show that the weakly interacting massive particle (WIMP) scenario of proton-philic spin-dependent inelastic dark matter can still provide a viable explanation of the observed DAMA effect in compliance with the constraints from other experiments. We also show that, although the COSINE-100 collaboration has recently tested the DAMA effect using the same target material, for the time being the comparison between DAMA and COSINE-100 still depends on the particle-physics model.

   hep-phastro-ph.COJ.Phys.Conf.Ser.(2020)·6 citations
7. 07*

   J/$\psi$p Scattering Length from GlueX Threshold Measurements

   Igor Strakovsky (GWU)🇺🇸 · Denis Epifanov (Budker Ins)🇷🇺 · Lubomir Pentchev (JLab)🇺🇸

   The quality of the recent GlueX $J/\psi$ photoproduction data from Hall~D at Jefferson Laboratory, and the proximity of the data to the energy threshold, gives access to a variety of interesting physics aspects. As an example, an estimation of the $J/\psi$-nucleon scattering length ${\alpha }_{J/\psi p}$ is provided within the vector meson dominance model. It results in $|{\alpha }_{J/\psi p}|=(3.08\pm 0.55(stat.)\pm 0.45(syst.))$~mfm.

   hep-phhep-exnucl-exnucl-thPRC(2020)·46 citations
8. 08*

   Spin structure of hadrons and minimum energy of bound systems

   Petr Zavada🇨🇿

   The spin of a composite particle, like a nucleus or a hadron, is generated by the composition of angular moments (consisting of spins and orbital angular moments) of the constituents. The composition of two angular moments is done by the standard way with the use of Clebsch-Gordan coefficients. However, if there are more than two constituents, the composition must be done in a hierarchical way, which admits more ways leading to the same resulting spin state |J, J_{z}>. Different composition patterns can generate states with the same spin quantum numbers, but which may vary in the contributions of different kinds of the constituents. We will discuss which composition patterns could be preferred in the hadrons from the viewpoint of minimal energy of the bound system. In this context, particular attention is paid to the role of gluons or quark orbital angular momentum in the proton spin.

   hep-ph3 citations
9. 09*

   Deconfined, Massive Quark Phase at High Density and Compact Stars: A Holographic Study

   Kazem Bitaghsir Fadafan🇮🇷 · Jesus Cruz Rojas🇬🇧 · Nick Evans🇬🇧

   In Hoyos et al. (arXiv:1603.02943) a holographic D3/D7 system was used to describe a deconfined yet massive quark phase of QCD at finite density, concluding that the equation of state of such a phase was not stiff enough to support exotic dense stars. That analysis used a hard quark mass to represent the dynamical mass and assumed a conformal gauge background. Here we phenomenologically adjust the D3/D7 system to include a running anomalous dimension for the quark condensate. This introduces a dynamical mechanism for chiral symmetry breaking yet the model still has a deconfined massive phase at intermediate densities. We show that these systems, dependent on the running profile in the deep IR, generate much stiffer equations of state and non-monotonic behaviour in the speed of sound. The results suggest that these equations of state may be closer to supporting hybrid stars with quark cores.

   hep-phhep-thnucl-thPRD(2020)·64 citations
10. 10*

    Lorentz violation footprints in the spectrum of high-energy cosmic neutrinos: Deformation of the spectrum of superluminal neutrinos from electron-positron pair production in vacuum

    J.M. Carmona🇪🇸 · J.L. Cortes🇪🇸 · J.J. Relancio🇪🇸 · M.A. Reyes🇪🇸

    The observation of cosmic neutrinos up to 2 PeV is used to put bounds on the energy scale of Lorentz invariance violation through the loss of energy due to the production of $e^{+}{e}^{-}$ pairs in the propagation of superluminal neutrinos. A model to study this effect, which allows to understand qualitatively the results of numerical simulations, is presented.

    hep-phgr-qchep-thSymmetry(2019)·11 citations
11. 11*

    Analysis of the $\psi (4040)$ and $\psi (4160)$ decay into $D^{(\ast )}{\bar{D}}^{(\ast )}$, $D_s^{(\ast )}{\bar{D}}_s^{(\ast )}$

    M. Bayar🇹🇷 · N. Ikeno🇪🇸 · E. Oset🇪🇸

    We have performed an analysis of the $e^{+}{e}^{-}\to D^{(\ast )}{\bar{D}}^{(\ast )}$ data in the region of the $\psi (4040)$ and $\psi (4160)$ resonances which have a substantial overlap and require special care. By using the ${}^3{P}_0$ model to relate the different $D^{(\ast )}{\bar{D}}^{(\ast )}$ production modes, we make predictions for production of these channels and compare with experiment and other theoretical approaches. As a side effect we find that these resonances qualify largely as $c\bar{c}$ states and the weight of the meson-meson components in the wave function is very small.

    hep-phEPJC(2020)·7 citations
12. 12*

    Oscillations of $B_s^0$ mesons as a probe of decays with unreconstructed particles

    Anton Poluektov🇫🇷 · Adam Morris🇫🇷

    A new experimental technique to study the decays of $B_s^0$ mesons into final states involving unreconstructable particles is proposed. The method uses a characteristic feature of fast flavour oscillations of $B_s^0$ mesons. Analysis of the oscillation-frequency spectrum of partially reconstructed flavour-tagged $B_s^0$ decays provides information about the mass spectrum of unreconstructed decay products and suppresses any background that does not come from the decays of $B_s^0$ mesons.

    hep-phhep-exJHEP(2020)·3 citations
13. 13*

    Gluon Radiation from a classical point particle II: dense gluon fields

    K. Kajantie🇫🇮 · Larry D. McLerran🇺🇸 · Risto Paatelainen🇨🇭

    The goal of this paper is to extend the results of Ref. [1], where formulae were derived for gluonic radiation for a high energy nucleus colliding with a classical colored particle. In Ref. [1], we computed the amplitudes for radiation in the fragmentation region of the particle for a dilute gluonic field. In this paper, we compute the radiation by solving the fluctuation equations of the dense background field in a specific gauge which makes it simple to solve the asymptotic radiation from an initial condition immediately after the passage of the nucleus. We identify and compute two components of gluon radiation, a bulk component which extends to the central region and bremsstrahlung, which may give rise to an experimentally observable intensity peak in the target fragmentation region.

    hep-phnucl-thPRD(2020)·9 citations
14. 14*

    Limits on 331 vector bosons from LHC proton collision data

    Andre Nepomuceno🇧🇷 · Bernhard Meirose🇺🇸

    In this paper, limits are set on bileptons masses and couplings in the context of the the 331 Model, as well as generic, non-331 Models predicting bileptons. The following measurable processes are studied: $pp\to {\ell }^{+}{\ell }^{+}{\ell }^{-}{\ell }^{-}X$, $pp\to {\ell }^{+}{\ell }^{-}\nu \nu X$ and $pp\to {\ell }^{+}{\ell }^{-}X$. Experimental limits on singly-charged bileptons masses and couplings within 331 Models are also obtained for the first time. With the results, an over 20 year-old experimental limit on vector bileptons is increased by 60\%. The computed limits are now the most stringent ones for these particles.

    hep-phPRD(2020)·19 citations
15. 15*

    Analysis of programming tools in framework of dark matter physics and concept of new MC-generator

    K.M. Belotsky🇷🇺 · A.H. Kamaletdinov🇷🇺 · E.S. Shlepkina🇷🇺

    We analyse here some programming tools (MC-generators) from viewpoint of their application to the tasks of dark matter (DM) interpretation of cosmic rays puzzles. We shortly describe our tasks, where the main goal is the solution of the problem of suppression of gamma-rays induced by the products of DM decay or annihilation in Galaxy. We show that existing MC-generators do not fully satisfy our task, comparing them, and suggest our own one.

    hep-phastro-ph.HE0 citations
16. 16*

    Yukawa ratio predictions in non-renormalizable $\mathrm{SO}(10)$ GUT models

    Stefan Antusch🇨🇭 · Christian Hohl🇨🇭 · Vasja Susič🇨🇭

    Since $\mathrm{SO}(10)$ GUTs unify all fermions of the Standard Model plus a right-chiral neutrino in a representation $16$ per family, they have the potential to be maximally predictive regarding the ratios between the masses (or Yukawa couplings) of different fermion types, i.e.~the up-type quarks, down-type quarks, charged leptons and neutrinos. We analyze the predictivity of classes of $\mathrm{SO}(10)$ (SUSY) GUT models for the fermion mass ratios, where the Yukawa couplings for each family are dominated by a single effective GUT operator of the schematic form ${16}^2\cdot {45}^n\cdot {210}^m\cdot \mathbf{H}$, for $\mathbf{H}\in \{10,120,\overline{126}\}$. This extends previous works to general vacuum expectation value directions for GUT-scale VEVs and to larger Higgs representations. In addition, we show that the location of the MSSM Higgses in the space of all doublets is a crucial aspect to consider. We discuss highly predictive cases and illustrate the predictive power in toy models consisting of masses for the 3rd and 2nd fermion family.

    hep-phJHEP(2020)·16 citations
17. 17*

    Probing New Physics in $b\to d$ Transitions

    Aleksey V. Rusov🇬🇧

    Recent experimental data on several observables in semileptonic $B$-meson decays are found to be in tension with the corresponding Standard Model predictions. Most of these deviations are related to $b\to c$ and $b\to s$ flavour changing transitions. In this work, we estimate possible New Physics effects in $b\to d{\mu }^{+}{\mu }^{-}$ flavour changing neutral currents. We parametrize NP contributions in a model-independent way and determine the allowed ranges of corresponding Wilson coefficients from the data on the exclusive $B^{\pm }\to {\pi }^{\pm }{\mu }^{+}{\mu }^{-}$ decays measured recently by the LHCb collaboration. Afterwards, we investigate the impact of these results on other $b\to d$ processes such as the leptonic $B^0\to {\mu }^{+}{\mu }^{-}$ decays and $B^0-{\bar{B}}^0$ mixing. As an example, we consider a simplified $Z^{\prime }$ model that is found to be consistent with current $b\to d$ data in the certain regions of the NP parameter space. In addition, we estimate the correlations between the partial decay widths of $B\to \pi {\mu }^{+}{\mu }^{-}$ and $B\to K{\mu }^{+}{\mu }^{-}$ processes to be used for an independent determination of CKM matrix elements as well as for a combined New Physics analysis of both $b\to d$ and $b\to s$ transitions.

    hep-phJHEP(2020)·23 citations
18. 18*

    New Estimation of the Curvature Effect for the X-ray Vacuum Diffraction Induced by an Intense Laser Field

    Y. Seino🇯🇵 · T. Inada🇯🇵 · T. Yamazaki🇯🇵 · T. Namba🇯🇵 · S. Asai🇯🇵

    Quantum electrodynamics predicts x-ray diffractions under a high-intensity laser field via virtual charged particles, and this phenomenon is called as vacuum diffraction (VD). In this paper, we derive a new formula to describe VD in a head-on collision geometry of an XFEL pulse and a laser pulse. A wavefront curvature of the XFEL pulse is newly considered in this formula. With this formula, we also discuss the curvature effect on VD signals based on realistic parameters at SACLA XFEL facility.

    hep-phhep-exphysics.opticsPTEP(2020)·13 citations
19. 19*

    Toward Initial Conditions of Conserved Charges Part II: The ICCING Monte Carlo Algorithm

    Patrick Carzon🇺🇸 · Mauricio Martinez🇺🇸 · Matthew D. Sievert🇺🇸 · Douglas E. Wertepny🇮🇱 · Jacquelyn Noronha-Hostler🇺🇸

    At top collider energies where baryon stopping is negligible, the initial state of heavy ion collisions is overall charge neutral and predominantly composed of gluons. Nevertheless, there can also be significant local fluctuations of the baryon number, strangeness, and electric charge densities about zero, perturbatively corresponding to the production of quark/antiquark pairs. These previously ignored local charge fluctuations can permit the study of charge diffusion in the quark-gluon plasma (QGP), even at top collider energies. In this paper we present a new model denoted ICCING (Initial Conserved Charges in Nuclear Geometry) which can reconstruct the initial conditions of conserved charges in the QGP by sampling a ($g\to q\bar{q}$) splitting probability over the initial energy density. We find that the new charge distributions generally differ from the bulk energy density; in particular, the strangeness distribution is significantly more eccentric than standard bulk observables and appears to be associated with the geometry of hot spots in the initial state. The new information provided by these conserved charges opens the door to studying a wealth of new charge- and flavor-dependent correlations in the initial state and ultimately the charge transport parameters of the QGP.

    ↳ nucl-thhep-phPRC(2022)·43 citations
20. 20*

    Ultrasensitive optomechanical detection of an axion-mediated force based on a sharp peak emerging in probe absorption spectrum

    Lei Chen🇨🇳 · Jian Liu🇨🇳 · Kadi Zhu🇨🇳

    Axion remains the most convincing solution to the strong-CP problem and a well-motivated dark matter candidate, causing the search for axions and axion-like particles(ALPs) to attract attention continually. The exchange of such particles may cause anomalous spin-dependent forces, inspiring many laboratory ALP searching experiments based on the detection of macroscopic monopole-dipole interactions between polarized electrons/nucleons and unpolarized nucleons. Since there is no exact proof of the existence of these interactions, to detect them is still of great significance. In the present paper, we study the electron-neucleon monopole-dipole interaction with a new method, in which a hybrid spin-nanocantilever optomechanical system consisting of a nitrogen-vacancy(NV) center and a nanocantilever resonator is used. With a static magnetic field and a pump microwave beam and a probe microwave beam applied, a probe absorption spectrum could be obtained. Through specific peaks appearing in the spectrum, we can identify this monopole-dipole interaction. And we also provide a prospective constraint to constrain the interaction. Furthermore, because our method can also be applied to the detection of some other spin-dependent interactions, this work provides new ideas for the experimental searches of the anomalous spin-dependent interactions.

    ↳ astro-ph.COhep-phOpt.Commun.(2021)·3 citations
21. 21*

    Measurements of the Branching Fractions $\mathcal{B}(B^{-}\to {\bar{\Lambda }}_c^{-}{\Xi }_c^{{}^{\prime }0})$, $\mathcal{B}(B^{-}\to {\bar{\Lambda }}_c^{-}{\Xi }_c(2645{)}^0)$ and $\mathcal{B}(B^{-}\to {\bar{\Lambda }}_c^{-}{\Xi }_c(2790{)}^0)$

    Belle Collaboration: Y. Li · Y. B. Li · C. P. Shen · I. Adachi · H. Aihara · D. M. Asner · H. Atmacan · V. Aulchenko · R. Ayad · V. Babu · I. Badhrees · A. M. Bakich and 163 other authors

    Using the data sample of 711 fb${}^{-1}$ of ${\rm Y}(4S)$ on-resonance data taken by the Belle detector at the KEKB asymmetric-energy electron-positron collider, we present the first measurements of branching fractions of the decays $B^{-}\to {\bar{\Lambda }}_c^{-}{\Xi }_c^{{}^{\prime }0}$, $B^{-}\to {\bar{\Lambda }}_c^{-}{\Xi }_c(2645{)}^0$, and $B^{-}\to {\bar{\Lambda }}_c^{-}{\Xi }_c(2790{)}^0$. The signal yields for these decays are extracted from the recoil mass spectrum of the system recoiling against ${\bar{\Lambda }}_c^{-}$ baryons in selected $B^{-}$ candidates. The branching fraction of $B^{-}\to {\bar{\Lambda }}_c^{-}{\Xi }_c(2790{)}^0$ is measured to be $(1.1\pm 0.4\pm 0.2)\times 10^{-3}$, where the first uncertainty is statistical and the second systematic. The 90\% credibility level upper limits on $\mathcal{B}(B^{-}\to {\bar{\Lambda }}_c^{-}{\Xi }_c^{{}^{\prime }0})$ and $\mathcal{B}(B^{-}\to {\bar{\Lambda }}_c^{-}{\Xi }_c(2645{)}^0)$ are determined to be $6.5\times 10^{-4}$ and $7.9\times 10^{-4}$, respectively.

    ↳ hep-exhep-phPRD(2019)·6 citations
22. 22*

    Two photon transition form factors of neutral pseudoscalar mesons

    Minghui Ding🇮🇹 · Daniele Binosi🇮🇹 · Khépani Raya🇨🇳 · Lei Chang🇨🇳 · Craig D. Roberts🇨🇳

    Starting from the axial vector Ward-Green-Takahashi identity, and the necessity of preserving this identity when attempting to calculate the properties describing pseudoscalar mesons, we describe a Bethe-Salpeter kernel which takes into account the non-Abelian anomaly and therefore is suitable to describe the flavor mixing states $\eta ,{\eta }^{\prime }$. We then report results for the two photon transition form factors of $\eta ,{\eta }^{\prime }$, and compare them with existing experimental data.

    ↳ nucl-thhep-ph0 citations
23. 23*

    Constraints on the cosmic string loop collapse fraction from Primordial Black Holes

    Chloe James-Turner🇬🇧 · Danton P. B. Weil🇬🇧 · Anne M. Green🇬🇧 · Edmund J. Copeland🇬🇧

    A small fraction, $f$, of cosmic string loops can collapse to form Primordial Black Holes (PBHs). Constraints on the abundance of PBHs can therefore be used to constrain $f$. We update these calculations, taking into account the PBH extended mass function, and find $f<10^{-31}(G\mu /c^2{)}^{-3/2}$. This is roughly two orders of magnitude tighter than previous constraints. The improvement from the tighter constraints on the abundance of PBHs is partly off-set by refinements to the theoretical calculation of the cosmic string loop formation rate.

    ↳ astro-ph.COhep-phPRD(2020)·27 citations
24. 24*

    Neutrino-deuteron scattering: Uncertainty quantification and new $L_{1,A}$ constraints

    Bijaya Acharya🇩🇪 · Sonia Bacca🇩🇪

    We study neutral- and charged-current (anti)neutrino-induced dissociation of the deuteron at energies from threshold up to 150 MeV by employing potentials, as well as one- and two-body currents, derived in chiral effective field theory ($\chi$EFT). We provide uncertainty estimates from $\chi$EFT truncations of the electroweak current, dependences on the $\chi$EFT cutoff and variations in the pool of fit data used to fix the low-energy constants of $\chi$EFT. At 100 MeV of incident (anti)neutrino energy, these uncertainties amount to about 2-3\% and are smaller than the sensitivity of the cross sections to the single-nucleon axial form factor, which amounts to 5\% if one varies the range of the nucleon axial radius within the bands determined by recent lattice quantum chromodynamics evaluations and phenomenological extractions. We conclude that a precise determination of the nucleon axial form factor is required for a high-precision calculation of the neutrino-deuteron cross sections at energies higher than 100 MeV. By matching our low-energy $\chi$EFT results to those of pionless effective field theory ($\cancel{\pi }$EFT), we provide new constraints for the counterterm $L_{1,A}$ that parameterizes the strength of the axial two-body current in $\cancel{\pi }$EFT. We obtain a value of $4.9_{-1.5}^{+1.9}{\mathrm{fm}}^3$ at renormalization scale set to pion mass, which is compatible with, albeit narrower than, previous experimental determinations, and comparable to a recent lattice quantum chromodynamics calculation.

    ↳ nucl-thhep-phPRC(2020)·35 citations
25. 25*

    Spacetime and deformations of special relativistic kinematics

    J.M. Carmona🇪🇸 · J.L. Cortes🇪🇸 · J.J. Relancio🇪🇸

    A deformation of special relativistic kinematics (possible signal of a theory of quantum gravity at low energies) leads to a modification of the notion of spacetime. At the classical level, this modification is required when one considers a model including single- or multi-interaction processes, for which absolute locality in terms of canonical space-time coordinates is lost. We discuss the different alternatives for observable effects in the propagation of a particle over very large distances that emerge from the new notion of spacetime. A central ingredient in the discussion is the cluster decomposition principle, which can be used to favor some alternatives over the others.

    ↳ hep-thgr-qchep-phSymmetry(2019)·19 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.