Wed·May 22, 2024Wednesday·May 22, 2024

1. 01*

   Probing $|V_{td}|$ in single-top production at $p{e}^{\mp }$ colliders

   Edier Paredes Cruz🇲🇽 · Antonio O. Bouzas🇲🇽 · F. Larios🇲🇽

   We study the consequences for top-quark physics of having electron and positron beams available at the LHeC and FCC-he, as was the case in HERA. We show that the asymmetry between top production in $p{e}^{+}$ collisions and antitop production in $p{e}^{-}$ reactions is sensitive to $|V_{td}|$. By means of detailed parton-level Monte Carlo simulations of single $t$ and $\bar{t}$ production and its backgrounds, we parametrize the asymmetry dependence on $|V_{td}|$ and estimate its uncertainties. Our analysis includes realistic phase-space cuts, and machine-learning binary classifiers for background rejection. We thus obtain limits on $|V_{td}|$ that are substantially stronger than current ones, and also smaller than current projections for the HL-LHC. We have $|V_{td}|<1.6\times |V_{td}^{\mathrm{PDG}}|$ at the LHeC, at 68\% C.L.\ with $L_{\mathrm{int}}=2$/ab.

   hep-phEur.Phys.J.Plus(2025)·1 citation
2. 02*

   Kinetic energy and speed powers $v^n$ of a heavy quark inside $S$ wave and $P$ wave heavy-light mesons

   Wei Li🇨🇳 · Tianhong Wang🇨🇳 · Tai-Fu Feng🇨🇳 · Guo-Li Wang🇨🇳 · Chao-Hsi Chang🇨🇳

   Based on the instantaneous Bethe-Salpeter equation method, we calculate the average values $\overline{|\vec{q}{|}^n}\equiv q^n$ and speed powers $\overline{|\vec{v}{|}^n}\equiv v^n$ ($n=1,2,3,4$) of a heavy quark inside $S$ wave and $P$ wave heavy-light mesons, where $\vec{q}$ and $\vec{v}$ are the three dimensional momentum and velocity of the heavy quark, respectively. We obtain the kinetic energy ${\mu }_{{}_{\pi }}^2=0.455$ GeV${}^2$ for the $B$ meson, which is consistent with the experimental result $0.464\pm 0.076$ GeV${}^2$. For the $B_s$, $D$ and $D_s$ mesons, the ${\mu }_{{}_{\pi }}^2$ are $0.530$ GeV${}^2$, $0.317$ GeV${}^2$ and $0.369$ GeV${}^2$, respectively. And $v^2=0.0185$, $0.0215$, $0.121$, and $0.140$ for $B$, $B_s$, $D$, and $D_s$. We obtain some relationships, for example, $q_{{}_{0^{-}}}^n(mS)\approx q_{{}_{1^{-}}}^n(mS)$, $q_{{}_{0^{+}}}^n(mP)\approx q_{{}_{1^{{+}^{\prime }}}}^n(m{P}^{{}^{\prime }})>q_{{}_{1^{+}}}^n(mP)\approx q_{{}_{2^{+}}}^n(mP)$, and $q^n(mS)<q^n(mP)$ ($m=1,2,3$), etc.

   hep-phhep-exPRD(2024)·2 citations
3. 03*

   Electric field induction in quark-gluon plasma due to thermoelectric effects

   Kamaljeet Singh🇮🇳 · Jayanta Dey🇮🇳 · Raghunath Sahoo🇮🇳

   Relativistic heavy-ion collisions produce quark-gluon plasma (QGP), which is locally thermalized. Due to electrically charged particles (quarks), QGP exhibits interesting thermoelectric phenomena during its evolution, resulting in an electromagnetic (EM) field in the medium. In this study, for the first time, we estimate the induced electric field in QGP due to the thermoelectric effect. This phenomenon can induce an EM field even in QGP produced by the head-on heavy-ion collision. In peripheral heavy-ion collisions, the presence of a spectator current generates a transient magnetic field at the early stage, which disrupts the isotropy of the induced electric field. For the numerical estimation, we use a quasiparticle-based model that incorporates the lattice quantum chromodynamics equation of state for QGP. The induced electric field is estimated with cooling rates derived from Gubser hydrodynamic flow. Thermoelectric coefficients such as Seebeck, magneto-Seebeck, and Nernst coefficients play a crucial role in determining the induced field. Additionally, we account for the temperature evolution of QGP using different hydrodynamic cooling rates to calculate the transport coefficients. We also estimate the transport coefficients and the induced electric field in the presence of an external time-varying magnetic field, including the quantum effect of Landau quantization, and explore the effects of the intensity and decay parameter of the magnetic field on the induced electric field. Our findings reveal that the space-time profile of the induced electric field is zero at the center and increases as we go away from the center. During the early stages of evolution, the electric field can reach a maximum value of $eE\approx 1m_{\pi }^2$, decreasing in strength over time.

   hep-phhep-exhep-thnucl-ex+1PRD(2024)·16 citations
4. 04*

   Cosmic rays from annihilation of heavy dark matter particles

   E.V. Arbuzova🇷🇺 · A.D. Dolgov🇷🇺 · A.A. Nikitenko🇷🇺

   The origin of the ultra high energy cosmic rays via annihilation of heavy stable, fermions "f", of the cosmological dark matter (DM) is studied. The particles in question are supposed to be created by the scalaron decays in $R^2$ modified gravity. Novel part of our approach is the assumption that the mass of these carriers of DM is slightly below than a half of the scalaron mass. In such a case the phase space volume becomes tiny. It leads to sufficiently low probability of "f" production, so their average cosmological energy density could be equal to the observed energy density of dark matter. Several regions of the universe, where the annihilation could take place, are studied. They include the whole universe under assumption of homogeneous energy density, the high density DM clump in the galactic centre, the cloud of DM in the Galaxy with realistic density distribution, and high density clusters of DM in the Galaxy. Possible resonance annihilation of $f\bar{f}$ into energetic light particle is considered. We have shown that the proposed scenario can successfully explain the origin of the ultrahigh energy flux of cosmic rays where the canonical astrophysical mechanisms are not operative.

   hep-phastro-ph.HENPB(2025)·4 citations
5. 05*

   Monte Carlos for tau lepton -- Standard Model and New Physics signatures

   Z. Was🇵🇱

   One of purposes for High Energy accelerator experiments is confrontation of theory and measurements in ever new realms. Any new agreement extends theory applicability domain, any discrepancy hints to unexplained. That calls for better calculations or new, deeper theory. Often one has to search for small contributions over large Standard Model background. Multi-dimensional signatures and complex background subtraction cuts imply that Monte Carlo techniques are indispensable. My talk included description of: KKMC Monte Carlo for e+e- to tau+tau- (n gamma) (with tau decays), generation of additional lepton pairs of SM and New Physics, and of anomalous magnetic and electric dipole moments effects.

   hep-phSciPost Phys.Proc.(2025)·0 citations
6. 06*

   Dimuons from neutrino-nucleus collisions in the semi-inclusive DIS approach

   Ilkka Helenius🇫🇮 · Hannu Paukkunen🇫🇮 · Sami Yrjänheikki🇫🇮

   We present a next-to-leading order perturbative QCD calculation of dimuon production in neutrino-nucleus collisions. This process is typically calculated by assuming it to be proportional to inclusive charm production, which requires an effective acceptance correction to take the experimental cuts on the decay-muon kinematics into account. Here, we instead compute the dimuon production cross section directly as a convolution of semi-inclusive deep inelastic scattering to produce charmed hadrons, and a decay function fitted to $e^{+}{e}^{-}$ data to produce a muon from the charmed hadrons. The presented approach is in a good agreement with available experimental data and will serve as a starting point for higher-order QCD calculations without an external acceptance correction. The uncertainties arising from the decay function and scale dependence are sizeably smaller than those from the nuclear parton distribution functions. We also calculate the effective acceptances within our approach and compare them to those usually used in global fits of parton distribution functions, finding differences of the order of $10\%$, depending on the kinematics, perturbative order, and applied parton distributions.

   hep-phJHEP(2024)·7 citations
7. 07*

   Spectra and Decay Properties of Higher Lying $B_C$ Meson States

   Nayana T S🇮🇳 · Bhaghyesh🇮🇳

   In this work, the spectra and decay properties of $B_c$ mesons ($c\bar{b}$) have been investigated using a non-relativistic potential model incorporating corrections from LQCD. The non-relativistic Schrodinger wave equation is solved numerically using the Matrix Numerov Method. Using the obtained masses and wave functions, decay widths, lifetime, branching ratios and radiative decay widths are computed for the $c\bar{b}$ system. We compare the obtained results with the experimental data and with other theoretical models.

   hep-phInt.J.Mod.Phys.A(2024)·3 citations
8. 08*

   EW one-loop corrections to the longitudinally polarized Drell-Yan process. Charged-current case II

   S. Bondarenko (1,5)🇷🇺 · Ya. Dydyshka (2,3,5)🇷🇺 · L. Kalinovskaya (2,4)🇷🇺 · A. Kampf (2,4)🇷🇺 · R. Sadykov (2)🇷🇺 · V. Yermolchyk (2,3,5) ((1) Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna, Russia, (2) Dzhelepov Laboratory of Nuclear Problems, Joint Institute for Nuclear Research, Dubna, Russia, (3) The Institute for Nuclear Problems, Belarusian State University, Minsk, Belarus, (4) Lomonosov Moscow State University, Moscow, Russia, (5) Dubna State University, Dubna, Russia)🇷🇺

   Complete one-loop electroweak radiative corrections to the charged-current Drell-Yan processes $pp\to {\ell }^{+}{\nu }_{\ell }(+X)$ and $pp\to {\ell }^{-}{\bar{\nu }}_{\ell }(+X)$ are presented for the case of longitudinal polarization of initial particles. The results can be used to obtain precise predictions for the kinematic distributions of polarized $W^{\pm }$ production cross sections, and single- and double-spin asymmetries. Numerical results are obtained using the Monte-Carlo generator {\tt ReneSANCe}. This research contributes to a global next-to-leading order analysis of polarized parton distributions in proton-proton collisions at RHIC. We proved that the impact of the one-loop electroweak radiative corrections to single- and double-spin asymmetries is negligible.

   hep-phPhys.Part.Nucl.Lett.(2025)·1 citation
9. 09*

   Refining radiative decay studies in singly heavy baryons

   Yu-Xin Peng🇨🇳 · Si-Qiang Luo🇨🇳 · Xiang Liu🇨🇳

   In this work, we systematically study the radiative decays of singly heavy baryons, a crucial aspect of their spectroscopic behavior. To enhance the accuracy of our calculations, we utilize numerical spatial wave functions for the singly heavy baryons obtained through the Gaussian expansion method, which also yields their mass spectrum. As hadron spectroscopy enters an era of high precision, we believe our study of the radiative decays of singly heavy baryons will provide valuable insights for further exploration of these particles.

   hep-phhep-exPRD(2024)·22 citations
10. 10*

    Nucleon axial radius

    Yi Chen🇨🇳 · Yang Li🇨🇳 · Cédric Lorcé🇫🇷 · Qun Wang🇨🇳

    We present the first systematic study of the relativistic axial-vector four-current distributions inside a nucleon. We show in particular that the slope of the axial form factor $G_A(Q^2)$ in the forward limit -- conventionally denoted as $R_A^2$ in the literature -- does not represent the three-dimensional mean-square axial radius in the Breit frame, but corresponds instead to a contribution to the mean-square spin radius. We derive explicit expressions for the latter in different frames and find in general additional contributions that depend on both the nucleon mass and the forward values of the axial-vector form factors $G_A(0)$ and $G_P(0)$. This provides an additional key motivation for ongoing lattice quantum chromodynamics (QCD) calculations and future experimental measurements of the induced pseudoscalar form factor $G_P(Q^2)$.

    hep-phPRD(2024)·11 citations
11. 11*

    Accelerating Resonance Searches via Signature-Oriented Pre-training

    Congqiao Li🇨🇳 · Antonios Agapitos🇨🇳 · Jovin Drews🇩🇪 · Javier Duarte🇺🇸 · Dawei Fu🇨🇳 · Leyun Gao🇨🇳 · Raghav Kansal🇺🇸 · Gregor Kasieczka🇩🇪 · Louis Moureaux🇩🇪 · Huilin Qu🇨🇭 · Cristina Mantilla Suarez🇺🇸 · Qiang Li🇨🇳

    The search for heavy resonances beyond the Standard Model (BSM) is a key objective at the LHC. While the recent use of advanced deep neural networks for boosted-jet tagging significantly enhances the sensitivity of dedicated searches, it is limited to specific final states, leaving vast potential BSM phase space underexplored. We introduce a novel experimental method, Signature-Oriented Pre-training for Heavy-resonance ObservatioN (Sophon), which leverages deep learning to cover an extensive number of boosted final states. Pre-trained on the comprehensive JetClass-II dataset, the Sophon model learns intricate jet signatures, ensuring the optimal constructions of various jet tagging discriminates and enabling high-performance transfer learning capabilities. We show that the method can not only push widespread model-specific searches to their sensitivity frontier, but also greatly improve model-agnostic approaches, accelerating LHC resonance searches in a broad sense.

    hep-phhep-exphysics.data-an34 citations
12. 12*

    CTA and SWGO can Discover Higgsino Dark Matter Annihilation

    Nicholas L. Rodd🇺🇸 · Benjamin R. Safdi🇺🇸 · Weishuang Linda Xu🇺🇸

    Thermal higgsino dark matter (DM), with a mass near 1.1 TeV, is one of the most well-motivated and untested DM candidates. Leveraging recent hydrodynamic cosmological simulations that give DM density profiles in Milky Way analogue galaxies we show that the line-like gamma-ray signal predicted from higgsino annihilation in the Galactic Center could be detected at high significance with the upcoming Cherenkov Telescope Array (CTA) and Southern Wide-field Gamma-ray Observatory (SWGO) for all but the most pessimistic DM profiles. We perform the most sensitive search to-date for the line-like signal using 15 years of data from the Fermi Large Area Telescope, coming within an order one factor of the necessary sensitivity to detect the higgsino for some Milky Way analogue DM density profiles. We show that H.E.S.S. has sub-leading sensitivity relative to Fermi for the higgsino at present. In contrast, we analyze H.E.S.S. inner Galaxy data for the thermal wino model with a mass near 2.8 TeV; we find no evidence for a DM signal and exclude the wino by over a factor of two in cross-section for all DM profiles considered. In the process, we identify and attempt to correct what appears to be an inconsistency in previous H.E.S.S. inner Galaxy analyses for DM annihilation related to the analysis effective area, which may weaken the DM cross-section sensitivity claimed in those works by around an order of magnitude.

    hep-phastro-ph.COastro-ph.HEPRD(2024)·34 citations
13. 13*

    Probing $CP$ violation and mass ordering in neutrino oscillations in matter through quantum speed limits

    Subhadip Bouri🇮🇳 · Abhishek Kumar Jha🇮🇳 · Subhashish Banerjee🇮🇳

    The quantum speed limits (QSLs) set fundamental lower bounds on the time required for a quantum system to evolve from a given initial state to a final state. In this work, we investigate $CP$ violation and the mass ordering problem of neutrino oscillations in matter using the QSL time as a key analytical tool. We examine the QSL time for the unitary evolution of two- and three-flavor neutrino states, both in vacuum and in the presence of matter. Two-flavor neutrino oscillations are used as a precursor to their three-flavor counterparts. We further compute the QSL time for neutrino state evolution and entanglement in terms of neutrino survival and oscillation probabilities, which are experimentally measurable quantities in neutrino experiments. A difference in the QSL time between the normal and inverted mass ordering scenarios, for neutrino state evolution as well as for entanglement, under the effect of a $CP$ violation phase is observed. Our results are illustrated using the length scales and energies of ongoing long-baseline accelerator neutrino experiments such as T2K, NOvA, and the upcoming DUNE experiment. Notably, three-flavor neutrino oscillations in constant matter density exhibit faster state evolution across all these neutrino experiments in the normal mass ordering scenario. Additionally, we observe fast entanglement suppression in DUNE assuming a normal mass ordering.

    hep-phquant-phPRD(2025)·13 citations
14. 14*

    Expansion by regions meets angular integrals

    Vladimir A. Smirnov🇷🇺 · Fabian Wunder🇩🇪

    We study the small-mass asymptotic behavior of so-called angular integrals, appearing in phase-space calculations in perturbative quantum field theory. For this purpose we utilize the strategy of expansion by regions, which is a universal method both for multiloop Feynman integrals and various parametric integrals. To apply the technique to angular integrals, we convert them into suitable parametric integral representations, which are accessible to existing automation tools. We use the the code \texttt{asy.m} to reveal regions contributing to the asymptotic expansion of angular integrals. To evaluate the contributions of these regions in an epsilon expansion we apply the method of Mellin-Barnes representation. Our approach is checked against existing results on angular integrals revealing a connection between contributing regions and angular integrals constructed from an algebraic decomposition. We explicitly calculate the previously unknown asymptotics for angular integrals with three and four denominators and formulate a conjecture for the leading asymptotics and the pole part for a general number of denominators and masses.

    hep-phhep-thJHEP(2024)·15 citations
15. 15*

    Diamond of Infrared Equivalences in Abelian Gauge Theories

    Temple He🇺🇸 · Prahar Mitra🇳🇱 · Kathryn M. Zurek🇺🇸

    We demonstrate a tree-level equivalence between four distinct infrared objects in $(d+2)$-dimensional abelian gauge theories. These are ($i$) the large gauge charge $Q_{\epsilon }$ where the function $\epsilon$ on the sphere parameterizing large gauge transformations is identified with the Goldstone mode $\theta$ of spontaneously broken large gauge symmetry; ($ii$) the soft effective action that captures the dynamics of the soft and Goldstone modes; ($iii$) the edge mode action with Neumann boundary conditions; and ($iv$) the Wilson line dressing of a scattering amplitude, including a novel dressing for soft photons, which have local charge distributions despite having vanishing global charge. The promotion of the large gauge parameter to the dynamical Goldstone and the novel dressing of soft gauge particles give rise to intriguing possibilities for the future study of infrared dynamics of gauge theories and gravity.

    ↳ hep-thhep-phPRD(2024)·10 citations
16. 16*

    Is Planckian discreteness observable in cosmology?

    Gabriel R. Bengochea🇦🇷 · Gabriel Leon🇦🇷 · Alejandro Perez🇫🇷

    A Planck scale inflationary era -- in a quantum gravity theory predicting discreteness of quantum geometry at the fundamental scale -- produces the scale invariant spectrum of inhomogeneities with very small tensor-to-scalar ratio of perturbations and a hot big bang leading to a natural dark matter genesis scenario. Here we evoke the possibility that some of the major puzzles in cosmology would have an explanation rooted in quantum gravity.

    ↳ gr-qcastro-ph.HEhep-phhep-th+1Universe(2025)·7 citations
17. 17*

    Looking for Black Hole Morsels in Astrophysical Mergers via Hawking Radiation

    Giacomo Cacciapaglia🇫🇷 · Stefan Hohenegger🇫🇷 · Francesco Sannino🇮🇹

    Gravitational wave observation has provided numerous insights into the merger of astrophysical black holes. In contrast to other violent events (e.g. supernovae), they are, however, not expected to lead to significant emissions of photons and neutrinos. In this paper we discuss a scenario that would lead to characteristic observable gamma ray bursts, which would provide numerous hints to physics beyond General Relativity. Starting from the hypothesis that micro-black holes (called morsels) are formed during the merger process, we show that it is possible to observe their Hawking radiation, which takes the form of gamma ray bursts of a uniquely characteristic form: with energies in the TeV range, their temporal structure is unlike that stemming from any other astrophysical event. Notably, the time delay from the gravitational wave event is correlated to the mass distribution of the morsels. The integrated mass of the morsels, allowed by the unaccounted merger mass, leads to a Hawking radiation in photons that is above the sensitivity of atmospheric Cherenkov telescopes such as HESS, LHAASO and HAWC, and gamma ray space telescopes, such as Fermi-LAT. This renders the hypothesis of morsel creation experimentally testable, and we provide the first concrete bounds on the total mass of morsels formed in specific events.

    ↳ astro-ph.HEgr-qchep-phNPB(2025)·8 citations
18. 18*

    Impact of inhomogeneous diffusion on secondary cosmic ray and antiproton local spectra

    Álvaro Tovar-Pardo🇪🇸 · Pedro De La Torre Luque🇪🇸 · Miguel Ángel Sánchez-Conde🇪🇸

    Recent $\gamma$-ray and neutrino observations seem to favor the consideration of non-uniform diffusion of cosmic rays (CRs) throughout the Galaxy. In this study, we investigate the consequences of spatially-dependent inhomogeneous propagation of CRs on the fluxes of secondary CRs and antiprotons detected at Earth. A comparison is made among different scenarios in search of potential features that may guide us toward favoring one over another in the near future. We also examine both the influence of inhomogeneous propagation in the production of secondary CRs from interactions with the gas, and the effects of this scenario on the local fluxes of antiprotons and light antinuclei produced as final products of dark matter annihilation. Our results indicate that the consideration of an inhomogeneous diffusion model could improve the compatibility of the predicted local antiproton flux with that of B, Be and Li, assuming only secondary origin of these particles. In addition, our model predicts a slightly harder local antiproton spectrum, making it more compatible with the high energy measurements of AMS-02. Finally, no significant changes are expected in the predicted local flux of antiprotons and antinuclei produced from dark matter among the different considered propagation scenarios.

    ↳ astro-ph.HEhep-phJCAP(2024)·2 citations
19. 19*

    Implication of Jet Physics from MeV Line Emission of GRB 221009A

    Zhen Zhang🇨🇳 · Haoxiang Lin · Zhuo Li🇨🇳 · Shao-Lin Xiong🇨🇳 · Yan-Qiu Zhang · Qinyuan Zhang🇯🇵 · Shu-Xu Yi · Xilu Wang🇨🇳

    Ultrarelativistic jets are believed to play an important role in producing prompt emission and afterglow of gamma-ray bursts (GRBs), but the nature of the jet is poorly known owing to the lack of decisive features observed in the prompt emission. The discovery of an emission line evolving from about 37 to 6 MeV in the brightest-of-all-time GRB 221009A provides an unprecedented opportunity to probe GRB jet physics. The time evolution of the central energy of the line with power-law index $-1$ is naturally explained by the high-latitude curvature effect. Under the assumption that the line emission is generated in the prompt emission by $e^{\pm }$ pair production, cooling, and annihilation in the jet, we can strictly constrain jet physics with observed line emission properties. We find that the radius of the emission region is $r\gtrsim 10^{16}$ cm. The narrow line width of $\sim 10\%$ requires that the line emission occurs within $\sim 10\%$ of the dynamical time, which further implies short timescales of pair cooling to the nonrelativistic state and pair annihilation, as well as a slightly clumpy emission region. If the jet's Lorentz factor is $\Gamma \gtrsim 400$, the fast cooling requirement needs an energy density of magnetic field in the jet much larger than that of prompt gamma rays, i.e., a magnetically dominated jet. The temporal behavior of line flux suggests some angle dependence of line emission. We also discuss the difficulties of other scenarios for the observed emission line.

    ↳ astro-ph.HEhep-phhep-thApJL(2024)·10 citations
20. 20*

    Dilaton generation in propagation of magnetic dipole waves of pulsar in a galactic magnetic field

    M.O.Astashenkov🇷🇺 · A.V.Bedda🇷🇺 · K.V.Parfenov🇷🇺 · P.A.Vshivtseva🇷🇺

    This study is devoted to dilaton generation in propagation of magnetic dipole waves of pulsar in a galactic magnetic field. It is shown that in this process it's necessary to take into account the presence of a reflective index of matter distributed in the galaxy. According to obtained estimates influence of the gravitational field of pulsars and magnetars on radiation of magnetic dipole waves is negligible and tends to a small change of their amplitude, near about 1 per cent. That's why in this study one can neglect the impact of gravitational field on process of dilaton generation. Exact solution of the dilaton equation is found and angular distribution of dilaton radiation is obtained in propagation of magnetic dipole waves of pulsar in galactic magnetic field.

    ↳ astro-ph.HEhep-phJCAP(2024)·3 citations
21. 21*

    Expanding Microscopic Black Holes

    Samuel Kováčik🇸🇰

    Two interesting hypotheses about black holes have been proposed. The older one states that microscopic black holes can be accountable for the observed dark matter density. The newer one states that black holes are coupled to the expansion of the universe. Here, we combine those ideas and investigate the behaviour of expanding microscopic black holes. We observe two temperatures at which the radiation balances the expansion. While one of the balance points might be important in the analysis of primordial scenarios, the other would lead to a strong diffuse gamma radiation background, which is contradicted by the lack of observations. This establishes another indirect evidence disfavouring the hypothesis of cosmological coupling of black holes.

    ↳ gr-qchep-ph1 citation
22. 22*

    LISA double white dwarf binaries as Galactic accelerometers

    Reza Ebadi🇺🇸 · Vladimir Strokov🇺🇸 · Erwin H. Tanin🇺🇸 · Emanuele Berti🇺🇸 · Ronald L. Walsworth🇺🇸

    Galactic double white dwarf (DWD) binaries are among the guaranteed sources for the Laser Interferometer Space Antenna (LISA), an upcoming space-based gravitational wave (GW) detector. Most DWDs in the LISA band are far from merging and emit quasimonochromatic GWs. As these sources are distributed throughout the Milky Way, they experience different accelerations in the Galactic gravitational potential, and therefore each DWD exhibits an apparent GW frequency chirp due to differential acceleration between the source and LISA. We examine how Galactic acceleration influences parameter estimation for these sources; and investigate how LISA observations could provide insight into the distribution of matter in the Galaxy.

    ↳ gr-qcastro-ph.COastro-ph.GAhep-phPRD(2025)·14 citations
23. 23*

    Memory Burden Effect in Black Holes and Solitons: Implications for PBH

    Gia Dvali🇩🇪 · Juan Sebastián Valbuena-Bermúdez🇪🇸 · Michael Zantedeschi🇨🇳

    The essence of the \textit{memory burden} effect is that a load of information carried by a system stabilizes it. This universal effect is especially prominent in systems with a high capacity of information storage, such as black holes and other objects with maximal microstate degeneracy, the entities universally referred to as \textit{saturons}. The phenomenon has several implications. The memory burden effect suppresses a further decay of a black hole, the latest, after it has emitted about half of its initial mass. As a consequence, the light primordial black holes (PBHs), that previously were assumed to be fully evaporated, are expected to be present as viable dark matter candidates. In the present paper, we deepen the understanding of the memory burden effect. We first identify various memory burden regimes in generic Hamiltonian systems and then establish a precise correspondence in solitons and in black holes. We make transparent, at a microscopic level, the fundamental differences between the stabilization by a quantum memory burden versus the stabilization by a long-range classical hair due to a spin or an electric charge. We identify certain new features of potential observational interest, such as the model-independent spread of the stabilized masses of initially degenerate PBHs.

    ↳ hep-thastro-ph.COgr-qchep-phPRD(2024)·111 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.