Wed·Feb 22, 2023Wednesday·February 22, 2023

1. 01*

   Probing the dark sector with nuclear transition photons

   Bhaskar Dutta🇺🇸 · Wei-Chih Huang🇺🇸 · Jayden L. Newstead🇦🇺

   Here we present world-leading sensitivity to light ($<170$ MeV) dark matter (DM) using beam-dump experiments. Dark sector particles produced during pion decay at accelerator beam-dumps can be detected via scattering in neutrino detectors. The decay of nuclei excited by the inelastic scattering of DM is an unexploited channel which has significantly better sensitivity than similar searches using the elastic scattering channel. We show that this channel is a powerful probe of DM by demonstrating sensitivity to the thermal relic abundance benchmark in a scalar DM dark-photon portal model. This is achieved through the use of existing data, obtained by the KARMEN experiment over two decades ago, which allow us to set world-leading constraints on this model over a wide mass range. With experimental improvements planned for the future, this technique will be able to probe the thermal relic benchmark for fermionic DM across a wide mass range.

   hep-phnucl-thPRL(2023)·15 citations
2. 02*

   Efficient phase-space generation for hadron collider event simulation

   Enrico Bothmann🇩🇪 · Taylor Childers🇺🇸 · Walter Giele🇺🇸 · Florian Herren🇺🇸 · Stefan Hoeche🇺🇸 · Joshua Isaacson🇺🇸 · Max Knobbe🇩🇪 · Rui Wang🇨🇳

   We present a simple yet efficient algorithm for phase-space integration at hadron colliders. Individual mappings consist of a single t-channel combined with any number of s-channel decays, and are constructed using diagrammatic information. The factorial growth in the number of channels is tamed by providing an option to limit the number of s-channel topologies. We provide a publicly available, parallelized code in C++ and test its performance in typical LHC scenarios.

   hep-phhep-exSciPost Phys.(2023)·47 citations
3. 03*

   Investigating the effects of Lorentz Invariance Violation on the CP-sensitivities of the Deep Underground Neutrino Experiment

   Arnab Sarker🇮🇳 · Abinash Medhi🇮🇳 · Moon Moon Devi🇮🇳

   The neutrino oscillations offer great potential for probing new physics effects beyond the Standard Model. Any additional effect on neutrino oscillations can help understand the nature of these non-standard effects. The violation of fundamental symmetries may appear as new physics effects in various neutrino experiments. Lorentz symmetry is one such fundamental symmetry in nature, the violation of which implies a breakdown of space-time symmetry. The Lorentz Invariance Violation (LIV) is intrinsic in nature and its effects exist even in a vacuum. Neutrinos can be an intriguing probe for exploring such violations of Lorentz symmetry. The effect of violation of Lorentz Invariance can be explored through the impact on the neutrino oscillation probabilities. The effect of LIV is treated as a perturbation to the standard neutrino Hamiltonian considering the Standard Model Extension (SME) framework. In this work, we have probed the effect of LIV on the neutrino oscillation measurements considering the Deep Underground Neutrino Experiment (DUNE) as a case study. The inclusion of LIV affects various neutrino oscillation parameters as it modifies the standard neutrino oscillation probabilities. We looked into the capability of DUNE in constraining the LIV parameters and then explored the impact of CPT-violating LIV terms on the mass-induced neutrino oscillation probabilities. We have also probed the influence of LIV parameters on the CP-measurement sensitivity at DUNE.

   hep-phhep-exEPJC(2023)·16 citations
4. 04*

   Reaction plane alignment with linearly polarized photon in heavy-ion collisions

   Xin Wu🇨🇳 · Xinbai Li🇨🇳 · Zebo Tang🇨🇳 · Pengfei Wang🇨🇳 · Wangmei Zha🇨🇳

   The collective observables play critical roles in probing the properties of quark-gluon-plasma created in relativistic heavy-ion collisions, in which the information on initial collision geometry is crucial. However, the initial collision geometry, e.g., the reaction plane, cannot be directly extracted in the experiment. In this paper, we demonstrate the idea of determining the reaction plane via the feature of linear polarization of the coherent photoproduction process and discuss the advantages of the proposed approach in comparison with traditional methods.

   hep-phnucl-thPRResearch(2022)·22 citations
5. 05*

   How to measure the reactor neutrino flux below the inverse beta decay threshold with CE$\nu$NS

   Jiajun Liao🇨🇳 · Hongkai Liu🇮🇱 · Danny Marfatia🇺🇸

   Most antineutrinos produced in a nuclear reactor have energies below the inverse beta decay threshold, and have not yet been detected. We show that a coherent elastic neutrino-nucleus scattering experiment with an ultra-low energy threshold like NUCLEUS can measure the flux of reactor neutrinos below 1.8 MeV. Using a regularized unfolding procedure, we find that a meaningful upper bound can be placed on the low energy flux, but the existence of the neutron capture component cannot be established.

   hep-phhep-exnucl-exnucl-thPRD(2023)·3 citations
6. 06*

   Homotopy solution to non-linear evolution for heavy nuclei

   Carlos Contreras (UTFSM)🇨🇱 · Eugene Levin (Tel Aviv U./UTFSM)🇮🇱 · Rodrigo Meneses (U. de Valparaiso)🇨🇱

   In the paper we suggest the homotopy method for solving of the non linear evolution equation. This method consists of two steps. First is the analytical solution for the linearized version of the non-linear evolution deep in the saturation region. Second, the perturbative procedure is suggested to take into account the remaining parts of the non-linear corrections. It turns out that these corrections are rather small and can be estimated in the regular iterative procedure.

   hep-phPRD(2023)·5 citations
7. 07*

   Muon mass correction in partial wave analyses of charmed meson semi-leptonic decays

   Han Zhang🇨🇳 · Bai-Cian Ke🇨🇳 · Yao Yu🇨🇳 · En Wang🇨🇳

   We derive the parameterization formula for partial wave analyses of charmed meson semi-leptonic decays with consideration of the effects caused by the lepton mass. As the proposed super-tau-charm factory will reach much enhanced luminosity and BESIII is taking $\psi (3770)\to D\bar{D}$ data, our results are helpful to improve the measurement precision of future partial wave analyses of charmed meson semi-muonic decays.

   hep-phhep-exCPC(2023)·8 citations
8. 08*

   Searching for Dark Matter Annihilation with IceCube and P-ONE

   Kruteesh Desai🇩🇪 · Ruohan Li🇨🇳 · Stephan Meighen-Berger🇦🇺

   We present a new search for weakly interacting massive particles utilizing ten years of public IceCube data, setting more stringent bounds than previous IceCube analysis on massive dark matter to neutrino annihilation. We also predict the future potential of the new neutrino observatory, P-ONE, showing that it may even exceed the sensitivities of gamma-ray searches by about 1-2 orders of magnitude in 1-10 TeV regions. This analysis considers the diffuse dark matter self-annihilation to neutrinos via direct and indirect channels, from the galactic dark matter halo and extra-galactic sources. We also predict that P-ONE will be capable of pushing these bounds further than IceCube, even reaching the thermal relic abundance utilizing a galactic center search for extended run-time.

   hep-phastro-ph.HEJCAP(2024)·2 citations
9. 09*

   Dissociation rates and recombination likelihood of bottomonium states in heavy-ion collisions at $\sqrt{s_{\mathrm{NN}}}$ = 5.02 TeV

   Abdulla Abdulsalam🇸🇦 · Mohsin Ilahi🇮🇳 · Lana Alabbasi🇸🇦 · Rafeeda Kassim🇭🇺

   In the medium of relativistic heavy-ion collisions, dissociation of the quarkonium and their survival have been studied to understand the properties of Quark Gluon Plasma (QGP). The coupled rates of dissociation and recombination reactions in QGP are commonly solved with the Boltzmann transport equation in which the formation and dissociation reactions compete with each other. Since the dissociation of newly formed bound-states is not accounted in the Boltzmann equation, a framework of decoupled rates is developed to assess the combined effect of gluon-induced dissociation and recombination (though it is small for ${\rm Y}$) together with color screening on bottomonium production in heavy-ion collisions at center of mass energy ($\sqrt{s_{\mathrm{NN}}}$) = 5.02 TeV. To calculate the recombination rates, we have employed an effective method of Bateman solution which makes sure the correlated effect between the recombination and the dissociation of the newly combined bottomonium in the QGP medium. The modifications of bottomonium have been estimated in an inflating QGP with the constraints matching with the dynamics of Pb+Pb collision events at LHC.

   hep-phnucl-thInt.J.Mod.Phys.A(2023)·3 citations
10. 10*

    Phases of cold holographic QCD: baryons, pions and rho mesons

    Nicolas Kovensky🇫🇷 · Aaron Poole🇰🇷 · Andreas Schmitt🇬🇧

    We improve the holographic description of isospin-asymmetric baryonic matter within the Witten-Sakai-Sugimoto model by accounting for a realistic pion mass, computing the pion condensate dynamically, and including rho meson condensation by allowing the gauge field in the bulk to be anisotropic. This description takes into account the coexistence of baryonic matter with pion and rho meson condensates. Our main result is the zero-temperature phase diagram in the plane of baryon and isospin chemical potentials. We find that the effective pion mass in the baryonic medium increases with baryon density and that, as a consequence, there is no pion condensation in neutron-star matter. Our improved description also predicts that baryons are disfavored at low baryon chemical potentials even for arbitrarily large isospin chemical potential. Instead, rho meson condensation sets in on top of the pion condensate at an isospin chemical potential of about $9.4m_{\pi }$. We further observe a highly non-monotonic phase boundary regarding the disappearance of pion condensation.

    hep-phhep-thnucl-thSciPost Phys.(2023)·22 citations
11. 11*

    Probing the weak mixing angle at high energies at the LHC and HL-LHC

    Simone Amoroso🇩🇪 · Mauro Chiesa🇮🇹 · Clara Lavinia Del Pio🇮🇹 · Katerina Lipka🇩🇪 · Fulvio Piccinini🇮🇹 · Federico Vazzoler🇩🇪 · Alessandro Vicini🇮🇹

    Measurements of neutral current Drell-Yan production at large invariant dilepton masses can be used to test the energy scale dependence (running) of the electroweak mixing angle. In this work, we make use of a novel implementation of the full next-to-leading order electroweak radiative corrections to the Drell-Yan process using the $\overline{\mathrm{MS}}$ renormalization scheme for the electroweak mixing angle. The potential of future analyses using proton-proton collisions at $\sqrt{s}=13.6\mathrm{TeV}$ in the Run 3 and High-Luminosity phases of the LHC is explored. In this way, the Standard Model predictions for the $\overline{\mathrm{MS}}$ running at $\mathrm{TeV}$ scales can be probed.

    hep-phPLB(2023)·13 citations
12. 12*

    Flavour hierarchies and $B$-anomalies in a twin Pati-Salam theory of flavour

    Mario Fernández Navarro🇬🇧

    In this manuscript, based on arXiv:2209.00276, I present a model which can simultaneously explain and connect the flavour hierarchies of the Standard Model with flavour anomalies in $B$-physics. I will briefly introduce the model and highlight the main features, including a common origin of Yukawa couplings and vector leptoquark $U_1$ couplings to Standard Model fermions. A GIM-like mechanism allows for large leptoquark couplings which can explain the $B$-anomalies, while protecting from the most dangerous FCNCs that could be mediated by a heavy coloron and $Z^{\prime }$. Finally, I will highlight some of the most promising signals at low energy processes which can test the model in the upcoming future. The analysis has been updated with the late 2022 measurements of $R_{K^{(\ast )}}$ by LHCb.

    hep-phPoS(2024)·3 citations
13. 13*

    Quench dynamics of the Schwinger model via variational quantum algorithms

    Lento Nagano🇯🇵 · Aniruddha Bapat🇺🇸 · Christian W. Bauer🇺🇸

    We investigate the real-time dynamics of the $(1+1)$-dimensional U(1) gauge theory known as the Schwinger model via variational quantum algorithms. Specifically, we simulate quench dynamics in the presence of an external electric field. First, we use a variational quantum eigensolver to obtain the ground state of the system in the absence of an external field. With this as the initial state, we perform real-time evolution under an external field via a fixed-depth, parameterized circuit whose parameters are updated using McLachlan's variational principle. We use the same Ansatz for initial state preparation and time evolution, by which we are able to reduce the overall circuit depth. We test our method with a classical simulator and confirm that the results agree well with exact diagonalization.

    hep-phcond-mat.str-elhep-lathep-th+1PRD(2023)·39 citations
14. 14*

    On the Tremaine-Gunn Limit with Mass-Varying Particles

    Lotfi Boubekeur🇮🇹 · Stefano Profumo🇺🇸

    General classical arguments on the time evolution of the phase-space density can be used to derive constraints on the mass of particle candidates for the cosmological dark matter (DM). The resulting Tremaine-Gunn limit is extremely useful in constraining particle DM models. In certain models, however, the DM particle mass varies appreciably over time. In this work, we generalize the phase-space limits on possible DM particle masses to these scenarios. We then examine the ensuing cosmological implications on the effective DM equation of state and indirect DM detection.

    ↳ astro-ph.COhep-phhep-thPRD(2023)·8 citations
15. 15*

    Superfluid Dark Matter around Black Holes

    Valerio De Luca🇺🇸 · Justin Khoury🇺🇸

    Superfluid dark matter, consisting of self-interacting light particles that thermalize and condense to form a superfluid in galaxies, provides a novel theory that matches the success of the standard $\Lambda$CDM model on cosmological scales while simultaneously offering a rich phenomenology on galactic scales. Within galaxies, the dark matter density profile consists of a nearly homogeneous superfluid core surrounded by an isothermal envelope. In this work we compute the density profile of superfluid dark matter around supermassive black holes at the center of galaxies. We show that, depending on the fluid equation of state, the dark matter profile presents distinct power-law behaviors, which can be used to distinguish it from the standard results for collisionless dark matter.

    ↳ astro-ph.COastro-ph.GAgr-qchep-ph+1JCAP(2023)·29 citations
16. 16*

    Beam Energy Dependence of the Linear and Mode-Coupled Flow Harmonics Using the A Multi-Phase Transport Model

    Niseem Magdy🇺🇸

    In the framework of the A Multi-Phase Transport (AMPT) model, the multi-particle azimuthal cumulant method is used to calculate the linear and mode-coupled contributions to the quadrangular flow harmonic ($v_4$), mode-coupled response coefficient as a function of centrality in Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}$ = 200, 39, 27 and 19.6 GeV. This study indicated that the linear and mode-coupled contributions to the $v_4$ are sensitive to the beam energy change. Nevertheless, the correlations between different order flow symmetry planes and the mode-coupled response coefficients show a weak beam energy dependence. In addition, the presented results suggest that the experimental measurements that span a broad range of beam energies can be an additional constraint for the theoretical models' calculations.

    ↳ nucl-thhep-phnucl-exUniverse(2023)·4 citations
17. 17*

    Attractors for Flow Observables in 2+1D Bjorken Flow

    Victor E. Ambruş🇷🇴 · Sören Schlichting🇩🇪 · Clemens Werthmann🇩🇪

    We examine the capabilities of second-order Israel-Stewart-type hydrodynamics to capture the early-time behaviour of the quark-gluon plasma created in heavy-ion collisions. We point out that at very early times, the dynamics of the fireball is governed by the local 0+1-D Bjorken flow attractor due to the rapid expansion along the longitudinal direction. Discrepancies between hydrodynamics and kinetic theory in this far-from-equilibrium regime leads to disagreement at the level of late-time observables, such as elliptic flow. We show that rescaling the initial energy-density profile for hydrodynamics accounts for such discrepancies, restoring agreement with kinetic theory for large opacities (small shear viscosity / large system size / high energy).

    ↳ nucl-thhep-phphysics.flu-dynAIP Conf.Proc.(2024)·3 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.