Thu·Mar 23, 2023Thursday·March 23, 2023

1. 01*

   Precise description of medium-induced emissions

   Johannes Hamre Isaksen🇳🇴 · Konrad Tywoniuk🇳🇴

   We study jet fragmentation via final-state parton splittings in the medium. These processes are usually calculated theoretically by invoking the large-$N_c$ limit. In this paper we perform the first computation of a $1\to 2$ parton splitting in a thermal medium at finite numbers of colors $N_c$, for arbitrary momentum-sharing fraction $z$ and with full transverse dynamics. We show how the problem can be transformed into a system of coupled Schrödinger equations, that we solve numerically. The novel numerical results are used to estimate the accuracy of several widely used approximations. We check the error introduced while going from finite $N_c$ (i.e. $N_c=3$) to the large-$N_c$ limit, which we find to be small. For unbalanced splittings, e.g. when $z\to 0$, only one of the partons is affected by transverse momentum exchanges with the medium. The emission process then separates into a term responsible for the $1\to 2$ splitting and the subsequent independent broadening of the daughter partons. This is also referred to as the factorizable term. For finite $z$, further contributions arise that are responsible for the coherent color dynamics of the two-parton system, and these are referred to as non-factorizable terms. These were argued to be small for soft (unbalanced) splittings and for large media. In this work we therefore determine the accuracy of keeping only the factorizable term of the large-$N_c$ solution. We find that the error is insignificant at a small splitting fraction $z\sim 0$, but can be sizable in a more balanced splitting with $z\sim 0.5$. Finally, we also examine the eikonal approximation, which amounts to approximating the partons' paths through the medium as straight lines. We find that it is associated with a substantial error for the parameter values we explored in this work.

   hep-phhep-thnucl-thJHEP(2023)·28 citations
2. 02*

   Hot perturbative QCD in a very strong magnetic background

   Eduardo S. Fraga🇧🇷 · Letícia F. Palhares🇧🇷 · Tulio E. Restrepo🇧🇷

   We compute the pressure, chiral condensate and strange quark number susceptibility from first principles within perturbative QCD at finite temperature and very high magnetic fields up to next-to-leading order and physical quark masses. The region of validity for our framework is given by $m_s\ll T\ll \sqrt{eB}$, where $m_s$ is the strange quark mass, $e$ is the fundamental electric charge, $T$ is the temperature, and $B$ is the magnetic field strength. We study the convergence of the perturbative series for the pressure for different choices of renormalization scale in the running coupling, ${\alpha }_s(T,B)$. Our results for the chiral condensate and strange quark number susceptibility can be directly compared to recent lattice QCD data away from the chiral transition. Even though current lattice results do not overlap with the region of validity above, perturbative results seem to be in the same ballpark.

   hep-phPRD(2023)·17 citations
3. 03*

   Flavor solitons in dense neutrino gases

   Damiano F. G. Fiorillo🇩🇰 · Georg Raffelt🇩🇪

   We consider a dense neutrino gas in the "fast-flavor limit" (vanishing neutrino masses). For the first time, we identify exact solutions of the nonlinear wave equation in the form of solitons. They can propagate with both sub- or superluminal speed, the latter not violating causality. The soliton with infinite speed is a homogeneous solution and coincides with the usual fast-flavor pendulum except that it swings only once instead of being periodic. The subluminal soliton in the static limit corresponds to a one-swing "spatial pendulum". A necessary condition for such solutions to exist is a ``crossed'' neutrino angle distribution. Based on the Nyquist criterion, we derive a new sufficient condition without solving the dispersion relation. The solitons are very fragile: they are as unstable as the homogeneous neutrino gas alone. Moreover, in the presence of matter, only the solution survives that is homogeneous in a frame comoving with the matter current. Generally, the matter effect cannot be eliminated by transformations in flavor space, but instead has a real physical impact.

   hep-phastro-ph.COPRD(2023)·49 citations
4. 04*

   Non-forward radiative corrections to electron-carbon scattering

   M. Mihovilovič · A. B. Weber · P. Achenbach · M. Bajec · T. Beranek · J. Beričič · J. C. Bernauer · D. Bosnar · R. Böhm · M. Cardinali · L. Correa · L. Debenjak and 28 other authors

   Radiative corrections to elastic scattering represent an important part of the interpretation of electron-induced nuclear reactions at small energy transfers, where they make for a dominant part of background. Here we present and validate a new event generator for mimicking QED radiative processes in electron-carbon scattering that exactly calculates the coherent sum of the Bethe-Heitler amplitudes for the leading diagrams and can be reliably employed for a more robust determination of inelastic cross-sections.

   hep-phnucl-exEPJA(2023)·2 citations
5. 05*

   PSGen, a generator of phase space parameterizations for the multichannel Monte Carlo integration

   Karol Kolodziej🇵🇱

   PSGen is a new general purpose Fortran program which has been written to facilitate the Monte Carlo phase space integration of the S matrix element of any 2 -> n scattering process, with n=2,...,9, provided by the user. The program is written in Fortran 90/95. It uses a new very fast algorithm that automatically generates calls to Fortran subroutines containing different phase space parameterizations of the considered class of processes.The parameterizations take into account mappings of poles due to the Feynman propagators of unstable heavy particles decaying into 2 or 3 on shell final state particles according to predefined patterns, possible single or double $t$-channel poles and peaks due to one on shell photon or gluon radiation. The individual subroutines are organized in a single multichannel kinematics subroutine which can be easily called while computing the phase space integral of the S matrix element as a function of generated particle four momenta, in either the leading or higher orders of the perturbation series. The particle four momenta can be used in a quadruple precision version, if necessary.

   hep-phComput.Phys.Commun.(2023)·1 citation
6. 06*

   Beyond the Inert Doublet: imprints of Scotogenic Yukawa interactions at FCC-ee

   Carlo Marzo🇪🇪 · Aurora Melis🇮🇹

   It is tempting to interpret the minuscule scale of neutrino masses as a symptom of its radiative origin. In light of the notable leap in precision expected at the Future Circular Collider, we explore areas of the parameter space that can simultaneously support the detectable Higgs-strahlung signal with parallel ones from forthcoming measurements in low-energy observables. We pinpoint the role that the extra fermions have in shaping a signal distinct from the pure Inert Doublet one. The details of the full one-loop computation and on-shell renormalization are presented. Both normal and inverted hierarchies for the radiatively generated neutrino masses and angles are investigated.

   hep-phEPJC(2025)·1 citation
7. 07*

   Symmetry analysis of charmonium two-body decay

   X.H. Mo🇨🇳 · P. Wang🇨🇳 · J.Y. Zhang🇨🇳

   In the light of SU(3) flavor symmetry, the effective interaction Hamiltonian in tensor form is obtained by virtue of group representation theory. The strong and electromagnetic breaking effects are treated as a spurion octet so that the flavor singlet principle can be utilized as the criterion to determine the form of effective Hamiltonian. Two body decays of both baryonic and mesonic final states are parameterized in the uniform scheme, based on which the relative phase between the strong and electromagnetic amplitudes is studied for various charmonium decay modes, including psi' and/or J/jpsi decay to octet baryon pair, decuplet baryon pair, decuplet-octet baryon final state, and pseudoscalar-pseudoscalar meson final state. In data analysis of samples taken in $e^{+}{e}^{-}$ collider, the details of experimental effects, such as energy spread and initial state radiative correction are taken into consideration in order to make full use of experimental information and acquire the accurate and delicate results.

   hep-phPRD(2023)·4 citations
8. 08*

   A Representation Transformation of Parametric Feynman Integrals

   Wen Chen🇨🇳

   A transformation on homogeneous polynomials is proposed, which is further applied to parametric Feynman integrals. The two representations related through this transformation are dual to each other. It naturally leads to dualities of Landau equations and linear integral relations between the two representations. For integrals with momentum-space correspondences, the dual representation is equivalent to the Baikov representation.

   hep-phhep-thmath-phmath.MPPLB(2025)·3 citations
9. 09*

   Is it possible to simulate the cosmological stage of the nucleon mass generation?

   Vladimir I. Komarov🇷🇺

   The mechanism of elementary particle mass generation is a fundamental issue of physics. While cardinal progress has recently been achieved in the case of leptons and current quarks through the Brout-Engler-Higgs mechanism, this issue is at the stage of searching for the constituent quarks forming the nucleon mass. A deep similarity is noted in the paper between the constituent quark states arising in central inelastic $NN$ collisions within a certain energy interval and the QCD matter states at the cosmological stage of nucleon mass generation. This gives rise to special attention to the investigation of both issues.

   hep-phnucl-ex0 citations
10. 10*

    Scale dependence of the q and T parameters of the Tsallis distribution in the process of jet fragmentation

    Karoly Urmossy🇭🇺 · Antal Jakovac🇭🇺

    The dependence of the $q$ and $T$ parameters of the Tsallis-distribution-shaped fragmentation function (FF) on the fragmentation scale (found to be equal to the jet mass) is calculated via the resummation of the branching process of jet fragmentation in the leading-log appriximation (LLA) in the ${\varphi }^3$ theory. Jet and hadron spectra in electron-positron ($e^{+}{e}^{-}$) annihilations with 2- and 3-jet final states are calculated using virtual leading partons. It is found that jets, produced earlier in the branching process, are more energetic, and the energy, angle and multiplicity distributions of hadrons stemming from them are broader. It is also found that replacing the LL resummation in the branching process by a single splitting provides good approximation for the jet energy distribution in 2-jet events. Furthermore, a micro-canonical statistical event generator is presented for the event-by-event calculation of hadron momenta in $e^{+}{e}^{-}$ annihilations.

    hep-phEPJA(2023)·4 citations
11. 11*

    Flavor hierarchy of parton energy loss in quark-gluon plasma from a Bayesian analysis

    Wen-Jing Xing🇨🇳 · Shanshan Cao🇨🇳 · Guang-You Qin🇨🇳

    The quenching of light and heavy flavor hadrons in relativistic heavy-ion collisions probes the color and flavor dependences of parton energy loss through a color-deconfined quark-gluon plasma (QGP), and thus reveals the properties of QCD matter at extremely high density and temperature. By combining a next-to-leading order perturbative QCD calculation of parton production, a general ansatz of parton energy loss functions and parton fragmentation functions, we calculate the nuclear modification of various hadron species -- charged hadrons, $D$ mesons and $B$-decayed $J/\psi$ -- over a wide transverse momentum regime. Comparing our calculations to the experimental data using the Bayesian statistical analysis, we perform a first simultaneous extraction of the energy loss functions of gluons ($g$), light quarks ($q$), charm quarks ($c$) and bottom quarks ($b$) inside the QGP. We find that the average parton energy loss at high energies follows the expected hierarchy of $⟨\Delta E_g⟩>⟨\Delta E_q⟩\sim ⟨\Delta E_c⟩>⟨\Delta E_b⟩$, while the parton energy loss distribution can further test the QCD calculations of parton interaction with the dense nuclear matter. We also find that the reduction of experimental uncertainties can significantly improve the precision of the extracted parton energy loss functions inside the QGP.

    hep-phhep-exnucl-exnucl-thPLB(2024)·19 citations
12. 12*

    Heavy quark diffusion coefficient in heavy-ion collisions via kinetic theory

    Kirill Boguslavski🇦🇹 · Aleksi Kurkela🇳🇴 · Tuomas Lappi🇫🇮 · Florian Lindenbauer🇦🇹 · Jarkko Peuron🇫🇮

    We compute the heavy quark momentum diffusion coefficient $\kappa$ using QCD kinetic theory for a system going through bottom-up isotropization in the initial stages of a heavy ion collision. We find that the values of $\kappa$ are within 30% from a thermal system at the same energy density. When matching for other quantities we observe considerably larger deviations. We also observe that the diffusion coefficient in the transverse direction is larger at high occupation numbers, whereas for an underoccupied system the longitudinal diffusion coefficient dominates. The behavior of the diffusion coefficient can be understood on a qualitative level based on the Debye mass $m_D$ and the effective temperature of soft modes $T_{\ast }$. Our results for the kinetic evolution of $\kappa$ in different directions can be used in phenomenological descriptions of heavy quark diffusion and quarkonium dynamics to include the impact of pre-equilibrium stages.

    hep-phnucl-thPRD(2024)·49 citations
13. 13*

    Cross sections for inelastic $K$+$\varphi$ scattering

    Yi-Hao Pan🇨🇳 · Xiao-Ming Xu🇨🇳

    In the first Born approximation we study the reactions $K\varphi \to \pi K$, $\rho K$, $\pi K^{\ast }$, and $\rho K^{\ast }$ with quark-antiquark annihilation and creation. Transition amplitudes are derived with the development in spherical harmonics of the relative-motion wave functions of the two initial mesons and of the two final mesons so that parity is conserved and the total angular momentum of the final mesons equals the one of the initial mesons. Unpolarized cross sections are calculated from the transition amplitudes that also contain mesonic quark-antiquark relative-motion wave functions and transition potentials for quark-antiquark annihilation and creation. Notable temperature dependence of the cross sections is shown. While the cross sections for $K\varphi \to \rho K$, $K\varphi \to \pi K^{\ast }$, and $K\varphi \to \rho K^{\ast }$ may be of the millibarn scale, the cross section for $K\varphi \to \pi K$ is very small.

    hep-phnucl-thCPC(2023)·0 citations
14. 14*

    Jet momentum broadening during initial stages in heavy-ion collisions

    Kirill Boguslavski🇦🇹 · Aleksi Kurkela🇳🇴 · Tuomas Lappi🇫🇮 · Florian Lindenbauer🇦🇹 · Jarkko Peuron🇫🇮

    We study the jet quenching parameter $\hat{q}$ in the initial pre-equilibrium stages of heavy-ion collisions using the QCD kinetic theory description of the anisotropic quark-gluon plasma. This allows us to smoothly close the gap in the literature between the early glasma stage of the collision and the onset of hydrodynamics. We find that the pre-hydrodynamic evolution of $\hat{q}$ during the bottom-up kinetic scenario shows little sensitivity to the initial conditions, jet energies and models of the transverse momentum cutoff. We also observe that, similarly to the glasma case, the jet quenching parameter is enhanced along the beam axis as compared to the transverse direction during most of the kinetic evolution.

    hep-phnucl-thPLB(2024)·65 citations
15. 15*

    Exclusive heavy vector meson photoproduction on nuclei in NLO perturbative QCD

    K.J. Eskola (Jyvaskyla U. and Helsinki U.)🇫🇮 · V. Guzey (Jyvaskyla U. and Helsinki U.)🇫🇮 · T. Löytäinen (Jyvaskyla U. and Helsinki U.)🇫🇮 · H. Paukkunen (Jyvaskyla U. and Helsinki U.)🇫🇮 · C.A. Flett (IJCLab, Orsay)🇫🇷

    We make predictions for the cross section of coherent $J/\psi$ photoproduction in Pb-Pb and O-O ultraperipheral collisions (UPCs) at the LHC as a function of the $J/\psi$ rapidity $y$ in the framework of collinear factorization and next-to-leading order (NLO) perturbative QCD. We quantify the strong scale dependence and significant uncertainties due to nuclear PDFs and show that our approach provides a reasonable description of the LHC data on coherent $J/\psi$ photoproduction in Pb-Pb UPCs. We demonstrate that these uncertainties are reduced by approximately a factor of 10 in the scaled ratio of the O-O and Pb-Pb UPC cross sections. Our analysis indicates the dominance of the quark contribution to the UPC cross section at central rapidities, which affects the interpretation of the UPC data.

    hep-phhep-exnucl-exActa Phys.Polon.Supp.(2023)·1 citation
16. 16*

    Target normal single-spin asymmetry in inclusive electron-nucleon scattering in the 1/Nc expansion

    Jose L. Goity🇺🇸 · Christian Weiss🇺🇸 · Cintia Willemyns🇧🇪

    The target normal single-spin asymmetry in inclusive electron-nucleon scattering is studied in the low-energy regime that includes the $\Delta$ resonance. The particular interest in the asymmetry resides in that it is driven by two-photon exchange effects. It probes the spin-dependent absorptive part of the two-photon exchange amplitude, which is free of infrared and collinear singularities and represents the most pristine expression of two-photon exchange dynamics. The study presented here uses the 1/Nc expansion of QCD, which combines the $N$ and $\Delta$ through the emergent SU(4) spin-flavor symmetry in the baryon sector and allows for a systematic construction of the transition EM currents. The analysis includes the first subleading corrections in the 1/Nc expansion and presents results for elastic and inelastic final states. The asymmetry is found to be in the range $10^{-3}-10^{-2}$. The $\Delta$ resonance plays an important role as an intermediate state in the elastic asymmetry and as a final state in the inclusive asymmetry.

    hep-phnucl-thPRD(2023)·5 citations
17. 17*

    Probing quark transverse momentum distributions in the Color Glass Condensate: quark-gluon dijets in Deep Inelastic Scattering at next-to-eikonal accuracy

    Tolga Altinoluk🇵🇱 · Nestor Armesto🇪🇸 · Guillaume Beuf🇵🇱

    We study the production, in Deep Inelastic Scattering at high energy, of a quark-gluon dijet induced by $t$-channel quark exchange with the target, which goes beyond the eikonal approximation. Throughout this study we follow the Color Glass Condensate approach, keep full dependence on the quark mass and consider the target to be unpolarized. We focus on the correlation limit in which the produced jets fly almost back-to-back and find a factorized expression for the cross section, for both longitudinal and transverse photons, involving the unpolarized quark transverse momentum dependent distribution. Quark-gluon dijets can be distinguished from other types of dijets at least in the heavy quark case, thanks to heavy flavor tagging. In that case, the dominant background is expected to come from the eikonal production of a quark-antiquark-gluon system. We propose experimental cuts to suppress that background contribution, making the process of quark-gluon dijet production in Deep Inelastic Scattering a new method to probe the quark transverse momentum dependent distribution at the Electron Ion Collider.

    hep-phPRD(2023)·49 citations
18. 18*

    Drell-Yan lepton-pair production: $q_T$ resummation at approximate N${}^4$LL+N${}^4$LO accuracy

    Stefano Camarda🇨🇭 · Leandro Cieri🇪🇸 · Giancarlo Ferrera🇮🇹

    We consider Drell-Yan lepton pairs produced in hadronic collisions. We present high-accuracy QCD predictions for the transverse-momentum ($q_T$) distribution and fiducial cross sections in the small $q_T$ region. We resum to all perturbative orders the logarithmically enhanced contributions up to the next-to-next-to-next-to-next-to-leading logarithmic (N${}^4$LL) accuracy and we include the hard-virtual coefficient at the next-to-next-to-next-to-leading order (N${}^3$LO) (i.e. $\mathcal{O}({\alpha }_S^3)$) with an approximation of the N${}^4$LO coefficients. The massive axial-vector and vector contributions up to three loops have also been consistently included. The resummed partonic cross section is convoluted with approximate N${}^3$LO parton distribution functions. We show numerical results at LHC energies of resummed $q_T$ distributions for $Z/{\gamma }^{\ast },W^{\pm }$ production and decay, including the $W^{\pm }$ and $Z/{\gamma }^{\ast }$ ratio, estimating the corresponding uncertainties from missing higher orders corrections and from incomplete or missing perturbative information coefficients at N${}^4$LL and N${}^4$LO. Our resummed calculation has been encoded in the public numerical program DYTurbo.

    hep-phPLB(2023)·66 citations
19. 19*

    Natural explanation of recent results on $e^{+}{e}^{-}\to \Lambda \bar{\Lambda }$

    S.G. Salnikov🇷🇺 · A.I. Milstein🇷🇺

    We show that the recent experimental data on the cross section of the process $e^{+}{e}^{-}\to \Lambda \bar{\Lambda }$ near the threshold can be perfectly explained by the final-state interaction of $\Lambda$ and $\bar{\Lambda }$. The enhancement of the cross section is related to the existence of low-energy real or virtual state in the corresponding potential. We present a simple analytical formula that fits the experimental data very well.

    hep-phhep-exJETP Lett.(2023)·13 citations
20. 20*

    Dark Exoplanets

    Yang Bai🇺🇸 · Sida Lu🇮🇱 · Nicholas Orlofsky🇵🇱

    The prevailing assumption is that all exoplanets are made of ordinary matter. However, we propose an unconventional possibility that some exoplanets could be made of dark matter, which we name "dark exoplanets." In this paper, we explore methods to search for dark exoplanets, including the mass-radius relation, spectroscopy, missing transit, and transit light curve. Specifically, we focus on the transit light curve method and demonstrate how to distinguish partially transparent dark exoplanets from fully opaque ordinary exoplanets using both observed exoplanet data and dark exoplanet mock data. Our analysis shows that dark exoplanets with a large radius (above around 10% of the star radius) and a small optical depth (below around one) can be identified with current telescope sensitivities.

    ↳ astro-ph.EPastro-ph.IMhep-phPRD(2023)·16 citations
21. 21*

    Non-thermal distributions of charm and charmonium in relativistic heavy-ion collisions

    Chaoyu Pan🇨🇳 · Shuhan Zheng🇨🇳 · Meimei Yang🇨🇳 · Zhiwei Liu🇨🇳 · Baoyi Chen🇨🇳

    We employ the Boltzmann transport model to study the charmonium regeneration with non-thermal charm quarks in relativistic heavy-ion collisions. As heavy quarks do not reach kinetic thermalization in the quark-gluon plasma (QGP), the final transverse momentum distribution of regenerated charmonium depends on the degree of charm quark kinetic thermalization. When the charm momentum distribution becomes harder, more charm quarks are distributed in the middle and high $p_T$, where the production of regenerated charmonium also becomes larger. With non-thermal momentum distribution of charm quarks in their coalescence process, the nuclear modification factor $R_{AA}(p_T)$ of charmonium enhances at middle $p_T$. Besides, the elliptic flow $v_2(p_T)$ of charmonium also enhances at middle $p_T$ as more regenerated charmonium are distributed in this $p_T$ region. The theoretical calculations with non-thermal charm distribution explain well the $p_T$ dependence of charmonium $R_{AA}$ and $v_2$, which indicates that charm quarks do not reach complete kinetic thermalization in the QGP when charmonium are regenerated.

    ↳ nucl-thhep-phPRC(2023)·4 citations
22. 22*

    Status of the GINGER project

    A. D. V. Di Virgilio

    GINGER (Gyroscopes IN GEneral Relativity), based on an array of large dimension ring laser gyroscopes, is aiming at measuring in the Gran Sasso underground laboratory the Earth angular velocity with unprecedented sensitivity in order to record the general relativity effects on top of the Earth crust; 1 part $10^9$ of the Earth surface is the goal to access the signals expected by general relativity, due to deSitter and Lense-Thirring effects, this target is also valuable for Lorentz Violation in the gravity sector. GINGER is an multi-disciplinar project. Being attached to the Earth crust, it will provide useful data for geophysical investigation, and it will be one of the instruments in the recently proposed multi-components geophysical observatory of GranSasso. It is expected that the realisation of GINGER will take 18 months, and 3 years will take to reach the relative sensitivity of 1 part in $10^{11}$.

    ↳ gr-qchep-ph1 citation
23. 23*

    All-sky limits on Sterile Neutrino Galactic Dark Matter obtained with SRG/ART-XC after two years of operations

    E.I. Zakharov🇷🇺 · V.V. Barinov🇷🇺 · R.A. Burenin🇷🇺 · D.S. Gorbunov🇷🇺 · R.A. Krivonos🇷🇺 · A.Yu. Tkachenko🇷🇺 · V.A. Arefiev🇷🇺 · E.V. Filippova🇷🇺 · S.A. Grebenev🇷🇺 · A.A. Lutovinov🇷🇺 · I.A. Mereminsky🇷🇺 · S.Yu. Sazonov🇷🇺 and 3 other authors

    Dark matter sterile neutrinos radiatively decay in the Milky Way, which can be tested with searches for almost monochromatic photons in the X-ray cosmic spectrum. We analyse the data of SRG/ART-XC telescope operated for two years in the all-sky survey mode. With no significant hints in the Galactic diffuse X-ray spectrum we explore models with sterile neutrino masses in 12-40 keV range and exclude corresponding regions of sterile-active neutrino mixing.

    ↳ astro-ph.HEastro-ph.COhep-phPRD(2024)·6 citations
24. 24*

    Resonant neutrino self-interactions and the $H_0$ tension

    Jorge Venzor🇲🇽 · Gabriela Garcia-Arroyo🇲🇽 · Josue De-Santiago🇲🇽 · Abdel Pérez-Lorenzana🇲🇽

    In this work, we study the previously unexplored resonant region of neutrino self-interactions. Current disagreement on late and early time observations of the Universe expansion could be solved with new physics acting before the recombination era. Nonstandard neutrino self-interactions are among the most appealing candidates to solve this issue since they could be testable in the near (or midterm) future. We use linear cosmological datasets to test neutrino self-interactions for a sample of fixed scalar mediator masses in the range $10^{-2}$ eV $\le m_{\phi }\le 10^2$ eV. The resonant behavior produces observable effects at lower couplings than those reported in the literature for heavy and light mediators. We observe that in the best case scenario, using the Planck + BAO dataset, the tension with local measurements of $H_0$ eases from 4.9$\sigma$ (for $\Lambda$CDM) down to 2.8$\sigma$. Albeit, this is driven mainly by the addition of extra radiation, with $\Delta N_{\mathrm{eff}}\sim 0.5$. The joint dataset which includes Planck, BAO, and $H_0$ prefers a nonzero interaction from 2.3$\sigma$ to 3.9$\sigma$ significance in the range $0.5$ eV $\le m_{\phi }\le 10$ eV. Although, this last result is obtained with data that are still in tension. These results add the last piece in the parameter space of neutrino self-interactions at the linear perturbation regime.

    ↳ astro-ph.COhep-phPRD(2023)·26 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.