Tue·Feb 10, 2026Tuesday·February 10, 2026

1. 01*

   Radiative Seesaw Model with Baryon Number Violation and Upper Limit on Neutron-anti-Neutron Transition Time

   Rabindra N. Mohapatra🇺🇸 · Nobuchika Okada🇺🇸

   The minimal scotogenic model where small neutrino masses arise via radiative seesaw, is known to provide a unified framework for neutrino mass and origin of matter via leptogenesis. However if the inflation reheat temperature of the universe is below the sphaleron reheating temperature, then leptogenesis fails and one way to understand the origin of matter would be to add an effective interaction involving the right handed neutrino (RHN) $N$ of the form $\frac{1}{{\Lambda }^2}N{u}_R{d}_R{d}_R$. This model can lead to observable neutron-anti-neutron ($n-\bar{n}$) oscillation. We show that if RHNs are produced non-thermally, we can get a cosmological upper limit on the transition time ${\tau }_{n-\bar{n}}$, which is within the reach of the planned ESS HIBEAM/NNBAR experiment. The proton stability is guaranteed by the scotogenic $Z_2$ invariance, which prevents the appearance of the Dirac mass term for the neutrino

   hep-phPRD(2026)·0 citations
2. 02*

   Can Dirac neutrinos destabilize ${\mathcal{Z}}_2$ domain wall network?

   Debasish Borah🇮🇳 · Partha Kumar Paul🇮🇳 · Narendra Sahu🇮🇳

   In particle physics model building, a discrete ${\mathcal{Z}}_2$ symmetry is often spontaneously broken for phenomenological reasons. When this breaking occurs dynamically in the early Universe, stable domain wall networks are formed, which can eventually dominate the cosmic energy density. To avoid this problem, explicit ${\mathcal{Z}}_2$-breaking terms in the scalar potential are usually introduced in an ad hoc manner. In this Letter, we show that if the same ${\mathcal{Z}}_2$ symmetry is also responsible for generating light Dirac neutrino masses, such explicit breaking terms can instead arise radiatively from the particles involved in the Dirac mass generation. We find that the resulting bias term scales inversely with the cube of the Dirac neutrino mass, leading to a gravitational wave spectrum proportional to the sixth power of the Dirac neutrino mass. This establishes a nontrivial connection between the Dirac seesaw scale, the domain wall annihilation epoch, and the resulting stochastic gravitational wave signal. We further demonstrate that a wide range of Dirac seesaw scales can be probed by upcoming gravitational wave and cosmic microwave background experiments, while part of the parameter space simultaneously explains the observed baryon asymmetry via Dirac leptogenesis.

   hep-phastro-ph.COhep-exhep-th7 citations
3. 03*

   Constraints on Fermionic Dark Matter Absorption from Radiochemical Solar-Neutrino Measurements

   K. Ishidoshiro🇯🇵 · K. Tachibana🇯🇵

   We reinterpret classic radiochemical solar-neutrino measurements as ``rate meters'' for additional, non-negative capture-like contributions induced by fermionic dark matter absorption. Using the chlorine and gallium production-rate data, we build a Bayesian likelihood that accounts for the dominant uncertainties in the solar-neutrino capture-rate prediction (solar fluxes, oscillation parameters, and capture cross sections). Solar-model metallicity systematics are made explicit by presenting results for both the B16--GS98 and B16--AGSS09met solar-model realizations. From the 1D marginalized posteriors of the joint $(R_{\chi ,\mathrm{Cl}},R_{\chi ,\mathrm{Ga}})$ analysis, we obtain 90\% upper limits on additional capture-like rate contributions, dominated by chlorine: $R_{\chi ,\mathrm{Cl},90}\simeq 0.388\mathrm{SNU}$ (B16--GS98) and $0.588\mathrm{SNU}$ (B16--AGSS09met). In the charged-current V--A benchmark, we map these constraints onto upper bounds on $y\equiv m_{\chi }^2/(4\pi {\Lambda }^4)$ for $m_{\chi }$ above the ${}^{71}$Ga and ${}^{37}$Cl capture thresholds, using a pep-normalized operator mapping anchored to solar-neutrino capture inputs, where $m_{\chi }$ is the dark matter mass and $\Lambda$ is the effective scale suppressing the charged-current operator. At $m_{\chi }\simeq 1\mathrm{MeV}$, we find $y_{90}\simeq 4.88\times 10^{-49}{\mathrm{cm}}^2$ (B16--GS98) and $7.08\times 10^{-49}{\mathrm{cm}}^2$ (B16--AGSS09met). These radiochemical bounds are complementary to xenon-based absorption searches and collider interpretations by probing distinct nuclear targets with minimal reliance on spectral reconstruction.

   hep-phPTEP(2026)·0 citations
4. 04*

   SIMPonium bound states of complex scalar dark matter: Relic density and astrophysical signatures

   Pa. Gokhula Prasad🇮🇳 · V. Suryanarayana Mummidi🇮🇳

   We study a strongly interacting complex scalar dark matter candidate $(\chi )$, subject to an attractive potential mediated by a vector boson $A^{\mu }$. Such interactions allow $\chi$ to form bound states: SIMPonium. In this work, we systematically investigate the bound state dynamics of our dark sector, including the formation and decay of SIMPonium and it's influence on the thermal history. Our analysis shows in absence of any bound state formation $\chi$ freezes out at $x\approx 16$ and the presence of SIMPonium in the thermal bath slightly modifies the freeze out behaviour of the free $\chi$ particles, which freezes out at $x\approx 20$. While the bound state itself remains in chemical equilibrium for a longer duration and freezes out at a significantly later time, $x\approx 250$. We compute the indirect energy spectra arising from free dark matter annihilation and SIMPonium decay, where the resulting Standard Model particles subsequently produce both final state radiation and radiative decay spectra. We find that the total differential photon flux from dark matter with mass $m_{\chi }=150\mathrm{MeV}$ lies in the range $E_{\gamma }^2\frac{d\varphi }{d\Omega d{E}_{\gamma }}\in [10^{-27},10^{-17}]\mathrm{MeV}\mathrm{c}{\mathrm{m}}^{-2}{\mathrm{s}}^{-1}\mathrm{s}{\mathrm{r}}^{-1}$ , for photon energies in the interval $E_{\gamma }\in [10^{-3},10^2]\mathrm{MeV}$. The predicted signal is therefore exceedingly feeble and remains well below the sensitivity of current experimental facilities.

   hep-ph0 citations
5. 05*

   Far-from-Equilibrium Attractors and Universality in Ultra-Relativistic Heavy-Ion Collisions within Relativistic Kinetic Theory

   Vincenzo Nugara🇮🇹

   This PhD Thesis is devoted to the study of the emergence of attractors, universality and collectivity in ultra-relativistic collisions by means of relativistic kinetic theory. After an introduction about Quantum Chromodynamics (QCD), Quark-Gluon Plasma (QGP) and the importance of heavy-ion collisions to investigate both, we give an overview about the two main models able to describe the hot QCD matter collective behaviour, namely kinetic theory and hydrodynamics. Afterwards, the Relativistic Boltzmann Transport (RBT) model, which has been employed to obtain most part of the results of this thesis, is carefully described, from the numerical and physical perspectives. The study of attractors and universality proceeds then by starting from a simple one-dimensional massless model, moving to increasingly more complex scenarios, involving the full 3+1D setup, non-conformal systems and realistic event-by-event fluctuations. Particular attention is paid to the physical scales which govern the system collectivity and their interplay. We show that a very good description of collective behaviour can be carried out by means of a few variables which characterise the systems under study.

   hep-ph0 citations
6. 06*

   Single spin asymmetry in $e+p\to e^{\prime }+B^{\uparrow }+X$

   Yoshitaka Hatta🇺🇸 · Oleg V. Teryaev🇷🇺

   We study an exotic type of single spin asymmetry in unpolarized electron-proton scattering, in which the outgoing electron momentum exhibits a left-right asymmetry relative to the transverse spin of the leading baryon $B$ in the target fragmentation region. We lay out two theoretical frameworks for describing this effect: The twist-three fracture function at high-$Q^2$ and the spin-dependent odderon in the high energy limit.

   hep-phnucl-exPLB(2026)·3 citations
7. 07*

   Dark Matter as Screened Ordinary Matter

   Colin D. Froggatt🇩🇰 · Holger Bech Nielsen🇩🇰

   We look at our since long studied model for dark matter as being pearls of a speculated new vacuum containing highly compressed ordinary matter, with so much ordinary in it that the content of ordinary matter in the dark matter pearls dominate. Most dark matter models have the dark matter consisting mainly of new-physics-matter such as WIMPs being supersymmetric partners of possibly known particles or, as in Maxim Khlopovs model, a doubly negatively charged new-physics-particle with a helium nucleus attached. But usually the new-physics matter makes up weight-wise the major content. It is only in our model that the ordinary matter content in the dark matter dominates. We here expose some weak phenomenological evidence that, in truth, dark matter should be of the type with a dominant component of ordinary matter (weight-wise), thus favoring as the typical example our previously so much studied vacuum type 2 model. The main such evidence is that we manage a fit to data in which the 3.5 keV X-rays, presumed to result from dark matter, come both from collisions of dark matter with dark matter and from dark matter with ordinary matter! Both mechanisms are of so similar an order of magnitude that they are both seen, indicating that their similarity is due to a significant similarity between dark with ordinary matter. The fact that the amounts of ordinary and dark matter only deviate by a factor 6 points in the same direction. Using the information obtained from this fitting, we develop our speculation that the main content weight-wise of dark matter is ordinary matter to the very DAMA experiment. Actually we found three spots on the sky in which we fit the observed production of 3.5 keV X-rays with ordinary plus dark scattering.

   hep-ph0 citations
8. 08*

   Coulomb corrections in rare decays of neutral $B$ mesons with ${\ell }^{+}{\ell }^{-}$-pair in final state

   S. I. Manukhov🇷🇺 · N. V. Nikitin🇷🇺

   We present a systematic analysis of Coulomb corrections for leptonic ($B_{d,s}^0\to {\ell }^{+}{\ell }^{-}$), semileptonic ($B_{d,s}^0\to h^0{\ell }^{+}{\ell }^{-}$, $B_{d,s}^0\to V^0{\ell }^{+}{\ell }^{-}$) and radiative leptonic ($B_{d,s}^0\to \gamma {\ell }^{+}{\ell }^{-}$) decays of neutral $B$-mesons. The relativization of the Coulomb factor was performed by comparing the Gamow-Sommerfeld-Sakharov factor, the exact relativistic approach of Crater-Alstine-Sazdjian applied by us to scalar systems, and well-known one-loop QED calculations. Coulomb corrections are calculated for differential, angular, and double-differential distributions, as well as for partial decay widths. We also discuss the role of the Coulomb factor among other QED corrections, in particular, the contribution of soft-photon radiation, which is effectively simulated in experiments by tools such as PHOTOS. For the $B_s^0\to {\mu }^{+}{\mu }^{-}$ channel, Coulomb corrections improve the prediction of the partial width to $\delta =|{\mathcal{B}}^{(exp)}-{\mathcal{B}}^{(theory)}|/{\mathcal{B}}^{(exp)}=2\%$. This improvement brings the prediction closer to the LHCb/CMS experimental results within the current experimental (11\%) and theoretical (5\% lattice QCD) errors. In the decays $B^0\to K^0{\mu }^{+}{\mu }^{-}$ and $B^0\to K^{0\ast }{\mu }^{+}{\mu }^{-}$, Coulomb effects also reduce the discrepancies between theoretical predictions and experimental data (from $\delta =2\%$ to less than $\delta =1\%$ and from $\delta =11\%$ to $\delta =4\%$ respectively). Finally, for the decays involving $\tau$-leptons, the Coulomb correction reaches $4\%$. While currently smaller than the dominant form-factor uncertainties and experimental errors, the Coulomb correction represents a non-negligible systematic effect. It should be accounted for in the high-precision era of $B$-physics, where such effects may become significant for the interpretation of potential New Physics signals.

   hep-phPRD(2026)·0 citations
9. 09*

   The structure of the $X(3915)$ meson and its production in heavy ion collisions

   Sungtae Cho🇰🇷 · Aaron Park🇰🇷 · Su Houng Lee🇰🇷 · Sungsik Noh🇰🇷

   We study the structure of the $X(3915)$ meson in a quark model and explore how its production in heavy ion collisions depends on its internal structure. We first analyze the $X(3915)$ as a $c\bar{c}s\bar{s}$ state and solve the Hamiltonian with color-spin interactions within the quark model. We find that the ground state of the $c\bar{c}s\bar{s}$ with total spin 0 obtained from the quark model analysis favors a separated $D_s{\bar{D}}_s$ state. To probe its structure further, we study its production in relativistic heavy ion collisions for various proposed configurations. We calculate the transverse momentum distributions and yields for the $X(3915)$ assuming its structure to be either a charmonium, a tetraquark, or a hadronic molecular state. We argue that by measuring the transverse momentum distributions and yields of the $X(3915)$ produced in heavy ion collisions, one can identify the structure of the $X(3915)$.

   hep-phPRD(2026)·0 citations
10. 10*

    Information-Theoretic Gaps in Solar and Reactor Neutrino Oscillation Measurements

    Neetu Raj Singh Chundawat🇮🇳 · Yu-Feng Li🇨🇳

    Quantum estimation theory provides a fundamental framework for analyzing how precisely physical parameters can be estimated from measurements. Neutrino oscillations are characterized by a set of parameters inferred from experiments conducted in different production and detection environments. The two solar oscillation parameters, $\Delta m_{21}^2$ and ${\theta }_{12}$, can be estimated using both solar neutrino experiments and reactor neutrino experiments. In reactor experiments, neutrinos are detected after coherent vacuum evolution, while solar neutrinos arrive at the detector as incoherent mixtures. In this work, we use Quantum Fisher Information (QFI) to quantify and compare the information content accessible in these two experimental setups. We find that for reactor neutrinos, flavor measurements saturate the QFI bound for both parameters over specific energy ranges, demonstrating their optimality and explaining the high precision achieved by these experiments. In contrast, for solar neutrinos the phase-based contribution to the QFI, originating from the quantum coherence, is absent, rendering the estimation of $\Delta m_{21}^2$ purely population-based and effectively classical, while the QFI for ${\theta }_{12}$ is dominated by basis rotation at high energies and is nearly saturated by flavor measurements. Consequently, solar neutrino experiments are intrinsically more sensitive to ${\theta }_{12}$ than to $\Delta m_{21}^2$. This analysis highlights a fundamental distinction between the two estimation problems and accounts for their differing achievable precisions.

    hep-phhep-exquant-ph6 citations
11. 11*

    Interplay of Lorentz Invariance Violation and Earth's Matter Potential in High-Energy Neutrinos

    Simon Hilding-Nørkjær🇩🇰 · Johann Ioannou-Nikolaides🇩🇰 · D. Jason Koskinen🇩🇰 · Thomas Stuttard🇩🇰

    Searches for Lorentz invariance violation (LIV) in the neutrino sector have traditionally focused on non-standard neutrino oscillations induced by LIV in vacuum. In this work, however, we study anisotropic LIV in matter. First, we review vacuum LIV phenomenology, explaining the energy and direction dependence of sidereal modulations for anisotropic coefficients in the Standard Model Extension. We then demonstrate that for high-energy neutrinos, the interplay between anisotropic LIV operators and the Earth's matter potential produces, distinct, observable signatures absent in the vacuum case. We identify a crossover regime where the energy-dependent LIV Hamiltonian becomes comparable to the matter potential, leading to strong interference effects. By analyzing the propagation of neutrinos through a realistic Earth model, we establish three key phenomenological consequences: (1) direction-dependent resonant enhancements of oscillation probabilities, (2) a macroscopic breakdown of neutrino-antineutrino symmetry for CPT-even operators, and (3) a significant increase of the ${\nu }_{\tau }$ flux due to LIV-driven injection of high-energy neutrinos into the $\tau$ regeneration cycle. These results highlight that accounting for the interplay between LIV and matter is essential for future LIV searches at large-scale neutrino telescopes.

    hep-phJCAP(2026)·1 citation
12. 12*

    Shear viscosity of a massless quark-gluon gas in chemical equilibrium in terms of all $2\leftrightarrow 2$ cross sections

    Okey Ohanaka🇺🇸 · Zi-Wei Lin🇺🇸

    The analytical expressions of the shear viscosity of both one and two particle species with Boltzmann statistics and $2\to 2$ elastic scatterings are known from the Chapman-Enskog method and have been shown to be quite accurate. The expression for a multi-species hadronic gas under $2\to 2$ elastic scatterings is also known. Here we use the Chapman-Enskog method to derive the explicit expression of shear viscosity of a massless quark-gluon gas of $N_f$ quark flavors in chemical equilibrium subjected to all $2\to 2$ parton scatterings including for the first time inelastic scatterings. We then verify the expression in a general single-species limit, where the shear viscosity of the quark-gluon gas should reduce to the result for a single particle species. In addition, we show the explicit analytical result in terms of the seven independent cross sections for the special case of isotropic and energy-independent cross sections. The analytical expressions derived here can be useful for determining the shear viscosity of parton transport models with any $2\to 2$ scattering cross sections. They can also be coupled with finite temperature QCD cross sections to help study the shear viscosity of the quark gluon plasma.

    hep-phnucl-thPRD(2026)·2 citations
13. 13*

    Probing Light Dark Particles in Neutrino Scattering Experiments

    Ruofei Feng🇨🇳 · Shao-Feng Ge🇨🇳 · Yongchao Zhang🇨🇳

    In this work we investigate the production of a dark fermionic particle $\chi$ in the neutrino scattering experiments. In the framework of effective field theory, such process can be induced by the effective four-fermion interactions involving neutrinos, the dark particle $\chi$ and standard model particles. We perform a comprehensive analysis of all possible Lorentz structures, considering representative neutrino experiments with distinct neutrino sources and target particles. In particular, we examine the constraints on the effective couplings for the neutrino-nucleus scattering by the latest COHERENT CsI and CONUS+ data, as well as the prospects at the DUNE near detector from neutrino-electron scattering. It turns out the current COHERENT and CONUS+ constraints on the cutoff scales are less stringent than those from the existing Large Hadron Collider data and the SN1987A observations. However, the DUNE near detector could probe the cutoff scales beyond the existing CHARM II and LEP limits up to roughly 1 TeV, for the dark particle mass up to roughly 50 MeV. Our results demonstrate the complementarity between neutrino experiments and collider searches in probing the dark sector physics.

    hep-phhep-exJHEP(2026)·2 citations
14. 14*

    FIMPs in a two-component dark matter model with $Z_2\times Z_4$ symmetry

    XinXin Qi🇨🇳 · Hao Sun🇨🇳

    We investigate the FIMP-FIMP regime in a two-component dark matter model with a $Z_2\times Z_4$ symmetry, where a singlet scalar $S$ and a Majorana fermion $\chi$ serve as the dark matter candidates. A singlet scalar $S_0$ with vacuum expectation value $v_0$ generates the fermion mass through the relation $m_{\chi }=y_{sf}{v}_0$. We show that the tiny Yukawa coupling $y_{sf}$ needed to reproduce the observed relic abundance naturally leads to a large symmetry-breaking scale $v_0$, which induces an ultra-feeble portal coupling ${\lambda }_{ds}$ responsible for the production of $S$. We find that ${\lambda }_{ds}$ can reach values of $10^{-25}\lesssim {\lambda }_{ds}\lesssim 10^{-13}$, while gravitational freeze-in provides an irreducible contribution at extremely small couplings. Our results demonstrate that the relic abundance constraint, combined with symmetry breaking and freeze-in dynamics, naturally drives the portal interaction responsible for scalar dark matter production into the ultra-feeble regime.

    hep-ph1 citation
15. 15*

    Heavy quark collisional energy loss in a nonextensive quark-gluon plasma

    Bing-feng Jiang🇨🇳 · Jun Chen🇨🇳 · De-fu Hou🇨🇳

    In this study, we derive the longitudinal and transverse gluon self-energies and the corresponding dielectric functions for a nonextensive QGP, based on nonextensive statistical mechanics and a kinetic theory framework. The nonextensive parameter $q$ enters these quantities primarily through the modification of the Debye mass. Utilizing the derived dielectric functions, we then calculate the collisional energy loss for a heavy quark using two established formalisms: the plasma physics-based Thoma-Gyulassy formula and the thermal field theory-originated Kirzhnits-Thoma formula. Our results show that for both formalisms, the collisional energy loss increases with the nonextensive parameter $q$ with this enhancement being more significant at higher incident quark momenta and suppressed for a heavier quark mass. The energy loss predicted from the Kirzhnits-Thoma formula is substantially larger than that from the Thoma-Gyulassy formula, and the nonextensive effect on the energy loss is more pronounced in the former. Furthermore, the mass suppression of the nonextensive effect on the energy loss is weaker in the Kirzhnits-Thoma approach. These calculations demonstrate that nonextensive statistics can significantly alter the energy loss in the QGP.

    hep-ph1 citation
16. 16*

    Neutrinoless double beta decays of hyperons in covariant chiral perturbation theory

    Zi-Ying Zhao🇨🇳 · Ze-Rui Liang🇨🇳 · Feng-Kun Guo🇨🇳 · Li-Ping He🇨🇳 · De-Liang Yao🇨🇳

    Neutrinoless double beta ($0\nu \beta \beta$) decays of spin-1/2 hyperons are investigated in a covariant baryon chiral perturbation theory framework, extended by a $\Delta L=2$ operator proportional to the Majorana neutrino mass, where $L$ denotes the lepton number. Within the light Majorana neutrino exchange mechanism, the decay amplitudes are found to emerge at the one-loop level, representing the long-range contribution. The extended-on-mass-shell scheme is employed to renormalize the one-loop amplitudes and restore consistent chiral power counting. Consequently, the differential decay rates for all accessible hyperon $0\nu \beta \beta$ channels are predicted and the corresponding branching ratios are more than 20 orders of magnitude smaller than the current experimental upper bounds. Interestingly, it is found that the leading contribution to hyperon $0\nu \beta \beta$ decay is actually from short-range counterterm operators, as required by the renormalization argument. Neutrinoless transition form factors are proposed to determine this leading contribution through future lattice QCD simulations.

    hep-phhep-exhep-latnucl-th3 citations
17. 17*

    Charge asymmetry in $e^{+}{e}^{-}\to B^{(\ast )}{\bar{B}}^{(\ast )}$ processes in the vicinity of ${\rm Y}(4S)$

    S. G. Salnikov🇷🇺 · A. I. Milstein🇷🇺

    The effects of isotopic invariance violation in the processes $e^{+}{e}^{-}\to B\bar{B}$, $e^{+}{e}^{-}\to B^{\ast }\bar{B}$, and $e^{+}{e}^{-}\to B^{\ast }{\bar{B}}^{\ast }$ are considered in the energy range between the thresholds of $B^{+}{B}^{-}$ and $B_s^0{\bar{B}}_s^0$ production. The analysis is based on taking into account the final-state interaction in a six-channel problem. Our approach allowed us to obtain good agreement with recent Belle-II results for the ratio of the $B^0{\bar{B}}^0$ and $B^{+}{B}^{-}$ production cross sections in $e^{+}{e}^{-}$ annihilation in the vicinity of ${\rm Y}(4S)$. It is shown that at higher energies the ratios of the cross sections for pairs of neutral and charged $B^{(\ast )}$ mesons can differ significantly from unity. A detailed measurement of this effect will provide evidence that the nontrivial energy dependence of the $B^{(\ast )}{\bar{B}}^{(\ast )}$ production cross sections is a consequence of interference of the particle production amplitudes in the multichannel problem.

    hep-phhep-exNPA(2026)·1 citation
18. 18*

    A light DM model for large $B\to K+\text{mbox}invisible$ and $K\to \pi +\text{mbox}invisible$ decays and its implications for $B_s-{\bar{B}}_s$ mixing and neutron EDM

    Xuan Hong🇨🇳 · Xiao-Gang He🇨🇳 · Ming-Wei Li🇨🇳

    We study the implications for $B_s-{\bar{B}}_s$ mixing and the neutron electric dipole moment (EDM) in a light dark matter model with sizable invisible rare meson decays to accommodate the recent possible deviations from Standard Model (SM) predictions observed in $B^{+}\to K^{+}\nu \bar{\nu }$ by Belle II and $K^{+}\to {\pi }^{+}\nu \bar{\nu }$ by NA62. Given that the neutrinos in these decays escape detection, they can be replaced by other invisible final states. Based on effective operator analysis, it has been proposed that branching ratios for $B^{+}\to K^{+}+\text{mbox}invisible$ and $K^{+}\to {\pi }^{+}+\text{mbox}invisible$ can naturally be larger than the SM predictions due to the emission of light dark matter pairs. We demonstrate that this scenario can be realized within a UV-complete two-Higgs-doublet model (2HDM) where neutral Higgs bosons mediating dark matter interactions induce significant low-energy effects especially for $B_s-{\bar{B}}_s$ mixing and neutron EDM. Within the allowed parameter space, we find non-negligible contributions to $B_s-{\bar{B}}_s$ mixing. For neutron EDM, there is a cancellation due to the exchange of neutral spin-zero particle, but QCD renormalization group evolution will lift this cancellation which in fact is generally true for any neutral Higgs contribution. However, we demonstrate that such a cancellation does not occur for charged scalar contributions. Ultimately, the allowed CP-violating phases in the Yukawa sector can generate a neutron EDM at a level consistent with current bound.

    hep-phEPJC(2026)·2 citations
19. 19*

    Global observables and identified-hadron production in pp, O-O and Pb-Pb collisions at LHC Run 3 energies with EPOS4

    Hirak Kumar Koley🇮🇳 · Mitali Mondal🇮🇳

    The observation of collectivity in small and large collision systems challenges our understanding of thermalization and particle production. EPOS4 models this via a dynamical core--corona separation, where high-density regions form a collectively expanding core while low-density regions hadronize via string fragmentation. Its microcanonical core hadronization improves the description of transverse momentum and multiplicity-dependent observables. We present EPOS4 predictions for pp, O-O and Pb-Pb collisions, with and without UrQMD, showing non-universal $⟨p_T⟩$ scaling, significant hadronic-phase effects, and system-size-dependent $R_{AA}$ suppression. Charged-particle and transverse-energy densities show participant scaling; the transverse energy per charged particle is systematically larger in O--O than in Pb--Pb at comparable participant fraction, indicating a harder effective production in the lighter system. Identified-hadron spectra harden with event multiplicity with mass ordering and increasing core fractions. The mean transverse momentum exhibits a strong system dependence, with the steepest multiplicity evolution in pp, demonstrating that $⟨p_T⟩$ does not follow universal multiplicity scaling. The $p/\pi$ ratio shows an enhanced intermediate-$p_T$ region; the suppression of the integrated $p/\pi$ at the highest Pb--Pb multiplicities is reproduced only with UrQMD, highlighting hadronic-phase effects. The nuclear modification factor shows sizeable suppression in Pb--Pb and substantial suppression in central O--O collisions. Blast-wave fits exhibit the anti-correlation between $T_{\mathrm{kin}}$ and $⟨{\beta }_T⟩$, with UrQMD shifting the parameters towards lower $T_{\mathrm{kin}}$ and higher $⟨{\beta }_T⟩$. These results provide a timely baseline for Run~3 measurements and for constraining the onset of medium-like effects across system size.

    hep-phhep-ex1 citation
20. 20*

    Can Mirror Symmetry Challenge Local Realism? Probing Photon Entanglement from Positronium via Compton Scattering

    Junle Pei🇨🇳 · Lina Wu🇨🇳

    This study investigates photon entanglement generated from para-positronium decay by analyzing azimuthal correlations after the double Compton scattering with stationary electrons. We introduce a normalized correlation observable ${\mathcal{O}}_1=\cos (2{\varphi }_1-2{\varphi }_2)/C_1$ to witness entanglement. In the absence of decoherence, $⟨{\mathcal{O}}_1⟩=-1$, corresponding to a maximally entangled Bell state. With decoherence parameterized by $\rho$, the expectation becomes $-(1-\rho )$, allowing direct experimental quantification of coherence loss. A prior symmetry analysis of the Compton scattering process within the quantum field theory (QFT) is provided, which establishes the mirror-symmetric nature of the single-photon angular distribution. We further examine a local hidden-variable theory (LHVT) under the angular-momentum conservation. Imposing the mirror symmetry with respect to the plane defined by the photon spin and momentum leads to a non-negative LHVT prediction for $⟨{\sin }^2{\theta }_1{\sin }^2{\theta }_2\cos (2{\varphi }_1-2{\varphi }_2)⟩$, contradicting the negative QFT prediction value for any $\rho <1$. Thus, mirror symmetry serves as a novel criterion to exclude LHVT descriptions of the entangled state, whereas without preserving this symmetry, LHVTs can reproduce the correlations.

    hep-ph5 citations
21. 21*

    On soft contributions to the $B^{-}\to {\gamma }^{\ast }$ form factors

    Aoife Bharucha🇫🇷 · Danny van Dyk🇬🇧 · Eduardo Velásquez🇫🇷

    The photoleptonic decay $B^{-}\to \gamma {\ell }^{-}\bar{\nu }$ is the simplest low-energy process that probes the substructure of the $B$ meson, making it an excellent candidate to determine the parameters of $B$-meson light-cone distribution amplitudes from experimental data. More recently, the decay $B^{-}\to {\gamma }^{\ast }(\to {\ell }^{\prime -}{\ell }^{\prime +}){\ell }^{-}\bar{\nu }$ has received attention as an alternative probe of these parameters. Both decays are described through a common set of hadronic form factors, which if computed within the framework of QCD factorization give rise to the sensitivity to the $B$-meson light-cone distribution amplitudes. Nevertheless, in this case the form factors still receive so-called soft contributions that can only be estimated but not rigorously computed. In this work, we provide results for the QCD factorization expressions for the form factors, including terms at next-to-leading power in the $b$ quark mass and in the photon energy. We further use these results to estimate the soft contributions within a light-cone sum rule setup. Finally, using numerical results obtained from a benchmark model of the light-cone distribution amplitudes, we show that the soft contributions are under significantly better theoretical control at a mildly spacelike photon virtuality.

    hep-phJHEP(2026)·0 citations
22. 22*

    Primordial features as probes of baryogenesis from supersymmetric flat directions

    Yi-Peng Wu🇹🇼 · Xingang Chen🇺🇸 · Nino Ephremidze🇺🇸 · Lingfeng Li🇨🇳

    The Affleck-Dine mechanism is a leading baryogenesis scenario in which scalar condensates form coherently during inflation along supersymmetric flat directions that are lifted by supersymmetry-breaking effects. We update the viable parameter space for baryogenesis using recent Cosmic Microwave Background constraints on baryon-density isocurvature perturbations, taking the quantum fluctuations of the scalar condensate generated during inflation as initial conditions. We then show that primordial features arising from the inflaton sector can serve as a unique probe of baryogenesis models, whose mechanisms are otherwise difficult to access directly due to their high energy scales. These primordial features leave correlated imprints, such as sharp feature signals and clock signals, on both the curvature and baryon-density isocurvature perturbations, providing direct evidence for the existence of both light and heavy modes involved in the Affleck-Dine mechanism.

    hep-phastro-ph.COJCAP(2026)·0 citations
23. 23*

    Assessing the validity of the Born-Oppenheimer approximation in potential models for doubly heavy hadrons

    Zi-Long Man🇨🇳 · Hao Zhou🇨🇳 · Si-Qiang Luo🇨🇳 · Xiang Liu🇨🇳

    The Born-Oppenheimer approximation is widely used to investigate the properties of hydrogen-like systems and doubly heavy hadrons. However, the extent to which this approximation captures the features of such systems within potential models remains an open question. In this work, we adopt the results obtained with the Gaussian expansion method as a benchmark to assess the validity of the Born-Oppenheimer approximation within potential models for hadronic systems. We also investigate the dependence of the Born-Oppenheimer approximation results on the choice of trial wave functions. A comprehensive study of the Born-Oppenheimer approximation is carried out by performing calculations using Slater-type functions and Gaussian-type functions as trial wave functions, and by comparing the resulting predictions with those obtained from the Gaussian expansion method. We find that the calculations performed within the Born-Oppenheimer approximation are close to those obtained with the Gaussian expansion method when the heavy-quark mass is relatively small. However, as the heavy-quark mass increases, calculations employing Slater-type functions yield larger values than those from the Gaussian expansion method, whereas those using Gaussian-type functions lead to smaller ones. The use of Slater-type functions generally leads to an enhanced binding energy. The underestimation observed in Born-Oppenheimer approximation calculations with Gaussian-type functions primarily stems from the neglect of non-adiabatic corrections. This comparative study provides deeper insight into the structure of doubly heavy hadrons and helps clarify the applicability and limitations of the Born-Oppenheimer treatment within potential models.

    hep-phPRD(2026)·0 citations
24. 24*

    Coulomb corrections for the non-flip and spin-flip electromagnetic ${\mathbf{p}}^{\uparrow }\mathbf{A}$ amplitudes

    Andrei Poblaguev🇺🇸

    It is demonstrated that, within the eikonal approach, the Coulomb corrections to the elastic electromagnetic non-flip and spin-flip proton--nucleus amplitudes are identical when the two amplitudes share the same exponential form factors. This result allows Coulomb corrections to be computed numerically, and with high precision, for both electromagnetic and hadronic elastic $p^{\uparrow }A$ amplitudes in the massless-photon limit, including the effects of soft magnetic photon exchange. The method relies on analytical expressions and numerical integrations over a finite impact-parameter range with nonsingular integrands, providing a practical and systematically controlled framework for phenomenological applications.

    hep-phPRD(2026)·0 citations
25. 25*

    Testing the nuclear TMD gluon densities with heavy flavor production in proton-lead collisions at LHC

    A.V. Lipatov🇷🇺 · A.V. Kotikov🇷🇺

    We employ a simple model for nuclear modification of ordinary parton densities in a proton to evaluate the Transverse Momentum Dependent gluon and quark distributions in nuclei (nTMDs) within the popular Kimber-Martin-Ryskin/Watt-Martin-Ryskin approach. The model is based on a global analysis of available deep inelastic scattering data for different nuclear targets within the rescaling model, incorporating Fermi motion effects. The derived nTMDs are tested with latest CMS data on inclusive $b$-jet and $B^{+}$ meson production in proton-lead collisions collected at $\sqrt{s}=5.02$ and $8.16$~TeV using the High Energy Factorization framework. We predict the corresponding nuclear medium modification factors to be about of $0.8-1.2$ in the probed kinematical region, which is consistent with other estimations. Specially we highlight a possibility to investigate the nuclear modification of parton densities by applying different cuts on the final states in such processes.

    hep-phPRD(2026)·0 citations
26. 26*

    WISPedia -- the WISPs Encyclopedia

    Conrado Albertus🇪🇸 · Francesca Chadha-Day🇬🇧 · Arturo de Giorgi🇬🇧 · Rafid H. Dejrah🇹🇷 · Marta Fuentes Zamoro🇪🇸 · Christian Käding🇦🇹 · Luca Merlo🇪🇸 · María Ángeles Pérez-García🇪🇸 · Xavier Ponce Díaz🇨🇭 · Federico Urban🇨🇿 · Wen Yin🇯🇵

    The Weakly-Interacting Slim Particle encyclopedia (WISPedia) is a comprehensive reference work dedicated to the systematic compilation of theoretical models, Effective Field Theories, and frameworks involving Weakly Interacting Slim Particles (WISPs): a broad class of light, feebly coupled particles proposed in extensions of the Standard Model. In current times, where the number of models largely surpasses the number of new physics signals, this encyclopedia aims to provide a concise reference of their landscape. The goal is to provide a useful tool to the community to navigate among them. It does not aim to review all the models in detail, but to define their essential characteristics, and point the reader to useful and minimal material such as the original sources, review articles, tools and general compilations of bounds. Hence, the format of this reference resembles the direct style of a model encyclopedia of WISPs.

    hep-phhep-ex24 citations
27. 27*

    Tuning the violins: dark sector phase transition models for the PTA signal

    Torsten Bringmann🇳🇴 · Thomas Konstandin🇩🇪 · Jonas Matuszak🇩🇪 · Kai Schmidt-Hoberg🇩🇪 · Carlo Tasillo🇸🇪

    First-order phase transitions in a dark sector have been invoked as an intriguing possibility to explain the observed stochastic gravitational wave background at nanohertz frequencies. Here we perform a comprehensive study of the generic requirements for such a phase transition to explain the observed signal while being consistent with all relevant constraints. We consider three broad model classes for strong first-order transitions, realised by an Abelian dark Higgs boson, a two-step phase transition involving two scalar singlets, and a conformal scalar field with loop-induced symmetry breaking, respectively. We discuss the tuning that is required to successfully explain the Pulsar Timing Array (PTA) signal in each of these cases, and highlight the underlying physical mechanisms. We conclude that all three scenarios can in principle describe the data, but that conformal models stand out as the most generic, and least tuned, explanation. Future observations by the PTA collaborations and collider experiments will be crucial to test the viability of this hypothesis, and to further narrow in on the model parameters, if the PTA signal is indeed due to a strong first-order phase transition.

    hep-phastro-ph.CO11 citations
28. 28*

    Long-lived Left-Right signals at the FCC-ee

    Benjamin Fuks🇫🇷 · Jonathan Kriewald🇸🇮 · Miha Nemevšek🇸🇮 · Fabrizio Nesti🇮🇹

    We give an extensive discussion of the displaced signals of heavy Majorana neutrino production at future electron-positron colliders operating at various proposed energies in the context of the Left-Right symmetric model. A comprehensive collection of channels is taken into account, ranging from those featuring $W$ and $W_R$ mediation to those induced by scalar mixing and gauge/scalar boson fusion, with connections to the mechanism of neutrino mass origin. The emerging signatures feature possibly multiple displaced heavy neutrinos that are in some cases accompanied by prompt activity and forward leptons. We derive the corresponding total production rates and differential distributions, which allow us to differentiate the channels and have analytical estimates of the signal yield. We then develop realistic estimates of the selection efficiencies using a dedicated vertexing algorithm which establishes the displaced decay positions and supplies a reliable proxy for reconstructing the full four-momenta of long-lived particles. This allows to determine the realistic reaches in the parameter space of the Left-Right symmetric model across the various channels, and we show that these can strongly surpass the LHC ones, demonstrating that future lepton colliders are sensitive to left-right symmetry breaking scales in the deep multi-TeV regime.

    hep-phhep-exJHEP(2026)·2 citations
29. 29*

    Experimental Tests of Baryon and Lepton Number Conservation

    Volodymyr Takhistov🇯🇵

    Baryon number ($B$) conservation underlies the apparent stability of ordinary matter by forbidding the decay of nucleons, while lepton number ($L$) conservation plays a central role in the structure of lepton interactions and the possible origin of neutrino mass. In the Standard Model, $B$ and $L$ are accidental global symmetries rather than imposed fundamental principles. However, they are expected to be violated in many extensions of the theory, including frameworks of unification and processes in the early Universe. This review summarizes the status of experimental tests of $B$ and $L$ conservation and discusses them within a unified framework for interpreting current and future searches across different processes and experimental approaches, outlining historical and theoretical motivation, key physical processes, as well as their broader connections and complementarity to other searches.

    hep-phhep-exEncyclopedia of Particle Physics, vol 3, …·3 citations
30. 30*

    Astrophysical positronium and Dicke superradiance

    Abdaljalel E. Alizzi🇷🇺 · Zurab K. Silagadze🇷🇺

    Dicke superradiance is a fascinating phenomenon in which a large number of atoms cooperate to produce a brief and very intense burst of spontaneous emission. This phenomenon has been well studied in the laboratory, but its astrophysical aspects have only recently attracted the attention of a small number of researchers. Since the phenomenon of Dicke superradiance is relatively little known to the wider astrophysical community, we provide a fairly detailed review of its elementary theory in the appendix and speculate on the significance of superradiance for astrophysical hydrogen and positronium, given the abundant formation of the latter near the galactic center.

    ↳ astro-ph.HEhep-phPRD(2026)·0 citations
31. 31*

    Comprehensive table of calculated Huff factors

    Yuichi Uesaka · Tomoya Naito🇯🇵 · Shuichiro Ebata🇯🇵 · Megumi Niikura🇯🇵

    We present a systematic calculation of the Huff factor for nuclei with atomic numbers ($Z$) in the range of $6\le Z\le 94$. The Huff factor quantifies the increase in the partial lifetime of the decay-in-orbit (DIO) of the muonic atom and serves as an essential correction factor for extracting the nuclear muon capture rate from the measured lifetimes of the muonic atom. However, previous calculations typically provided only the atomic number dependence and neglected isotope dependence -- an assumption whose reliability had not been examined, despite its importance for a comprehensive understanding of the nuclear muon capture rate. In this work, we calculate the Huff factor using nuclear charge distributions obtained from a fully self-consistent microscopic nuclear structure model that incorporates pairing and deformation effects. The resultant Huff factors exhibit a monotonic decrease with increasing $Z$, while the isotope dependence is found to be small. Our results also show good agreement with previous calculations, supporting the reliability of the present framework. The comprehensive set of Huff factors presented here constitutes the first unified values currently available and will serve as a basis for future evaluations of muon nuclear data.

    ↳ nucl-thhep-phnucl-exAtom.Data Nucl.Data Tabl.(2026)·1 citation
32. 32*

    Radiative decay of heavy-light mesons from lattice QCD

    Wen-Zheng Hou🇨🇳 · Nan Wang🇨🇳 · Long-Cheng Gui🇨🇳 · Jun Hua🇨🇳 · Jian Liang🇨🇳 · Jun Shi🇨🇳 · Yu Meng🇨🇳

    We present the first systematic study of the radiative decays of charmed mesons using $2+1$-flavor clover fermion gauge ensembles generated by the CLQCD collaboration. One of the ensembles is at the physical pion mass, and one has a fine lattice spacing $a\sim 0.05\text{fm}$. We determine the coupling constants to be $g_{D^{\ast +}{D}^{+}\gamma }=-0.204(22)$ GeV${}^{-1}$, $g_{D^{\ast 0}{D}^0\gamma }=1.73(37)$ GeV${}^{-1}$, and $g_{D_s^{\ast +}{D}_s^{+}\gamma }=-0.120(14)$ GeV${}^{-1}$, respectively. Compared with previous studies, our results demonstrate significant improvements in precision. In particular, we carefully estimate the systematic uncertainty arising from matrix element fits, momentum transfer extrapolations, and chiral and continuum limit extrapolations, which are included in the reported total uncertainties. These couplings yield the following predictions of decay widths: ${\Gamma }_{D^{\ast +}\to D^{+}\gamma }=0.253(55)$ keV, ${\Gamma }_{D^{\ast 0}\to D^0\gamma }=18.2(7.8)$ keV, and ${\Gamma }_{D_s^{\ast +}\to D_s^{+}\gamma }=0.094(22)$ keV. This work establishes first-principles results of the charmed meson radiative transitions and provides inputs for understanding the structure and properties of heavy-light mesons.

    ↳ hep-lathep-phPRD(2026)·0 citations
33. 33*

    Dark Matter from Eternity

    G. Franciolini🇨🇭 · M. Peloso🇮🇹 · A. Riotto🇨🇭

    We propose that the totality of dark matter in the universe might ascribe its origin to one of the key properties of cosmological inflation, that it may be eternal: regions that at the end of the primordial accelerated expansion of the universe never reheated, but keep eternally inflating, manifest themselves as primordial black holes in our observable universe. This mechanism can provide a primordial black hole abundance which is larger than the standard one due to the gravitational collapse of sizeable overdensities in the radiation phase. It also predicts a broad spectrum for the curvature perturbation and a flat stochastic gravitational wave background at a level of ${\Omega }_{\text{GW}}{h}^2\simeq 10^{-10}$ up to the mHz.

    ↳ astro-ph.COgr-qchep-ph3 citations
34. 34*

    Holographic information measures for spin-$3/2$ $\Delta$ baryons in AdS/QCD

    H. Almeida🇧🇷 · R. da Rocha🇧🇷 · P. H. O. Silva🇧🇷 · B. Toniato🇧🇷

    Spin-$3/2$ $\Delta$ baryon resonances are investigated within AdS/QCD, using Rarita-Schwinger fields. The differential configurational entropy (DCE) and differential configurational complexity (DCC) associated with their bulk energy densities are computed. It yields Regge-like trajectories relating configurational information measures to the radial excitation number and the experimental mass spectrum of the $\Delta$ baryons. We then extrapolate the spectrum of heavier $\Delta$ baryon resonances beyond the currently established states in the PDG, also comparing them with states in the PDG that are omitted from the summary table. Our results support a relevant interplay among holographic QCD dynamics, configurational information entropy, and baryon spectroscopy in strongly coupled QCD.

    ↳ hep-thhep-phNPB(2026)·0 citations
35. 35*

    Constraints on non-standard neutrino interactions from Borexino extended data-set

    V. Antonelli🇮🇹 · D. Basilico🇮🇹 · G. Bellini🇮🇹 · J. Benziger🇺🇸 · R. Biondi🇩🇪 · B. Caccianiga🇮🇹 · F. Calaprice🇺🇸 · A. Caminata🇮🇹 · A. Chepurnov🇷🇺 · D. D'Angelo🇮🇹 · A. Derbin🇷🇺 · A. Di Giacinto🇮🇹 and 65 other authors

    Neutrino non-standard interactions (NSI) constitute an active research field, as they are closely related to potential new physics associated with dark matter searches and exotic interactions arising from fundamental symmetry violations. The Borexino's unprecedented sensitivity to solar neutrinos, derived from its low background and precision spectral measurements, enables stringent constraints on potential deviations from the standard three-flavor neutrino oscillation paradigm. This work presents an update on the analysis of flavor-diagonal NSI using the full Borexino Phase-III data set, extending the study previously reported in Constraints on flavor-diagonal non-standard neutrino interactions from Borexino Phase-II (JHEP 2020, 38). The updated analysis incorporates the extended temporal and statistical coverage of Phase-III. The results indicate improved sensitivity to the diagonal NSI parameters, with constraints exceeding those obtained in Phase-II. Furthermore, a more general analysis that includes all possible off-diagonal NSI terms is presented for the first time, providing a comprehensive exploration of the NSI parameter space associated with the flavors of the incoming and outgoing neutrinos. This work once again underlines Borexino's critical role in probing new physics scenarios and reinforces its legacy in neutrino research. Detailed comparisons with Phase-II results are discussed, along with implications for theoretical models of NSI.

    ↳ hep-exhep-phPRD(2026)·5 citations
36. 36*

    Synchrotron self-Compton process for constraining sub-GeV dark matter in Omega Centauri via SKA

    Guan-Sen Wang🇨🇳 · Bing-Yu Su🇨🇳 · Yang Yu🇨🇳 · Bo Zhang🇨🇳 · Lei Feng🇨🇳

    The search for the particle identity of dark matter (DM) continues to be a primary objective in modern physics. In this field, the sub-GeV mass range of DM detection remains a crucial yet challenging window. We investigate synchrotron self-Compton (SSC) emission from electrons and positrons produced by MeV-scale DM annihilation as a novel indirect detection channel. Focusing on the globular cluster Omega Centauri and the sensitivity of the Square Kilometre Array, we derive constraints on the annihilation cross section reaching $⟨\sigma v⟩\sim 10^{-29}{\mathrm{cm}}^3{\mathrm{s}}^{-1}$ in the tens-of-MeV range. Furthermore, constraints can reach below $⟨\sigma v⟩\sim 10^{-30}{\mathrm{cm}}^3{\mathrm{s}}^{-1}$ under favorable parameter choices. Although the derived limits depend on the uncertain propagation parameters, the SSC channel remains competitive with existing indirect constraints over a representative range of astrophysical assumptions, establishing SSC emission as a promising probe of sub-GeV DM.

    ↳ astro-ph.COhep-phPRD(2026)·0 citations
37. 37*

    Area Scaling of Dynamical Degrees of Freedom in Regularised Scalar Field Theory

    Oliver Friedrich🇩🇪 · Kristina Giesel🇩🇪 · Varun Kushwaha🇩🇪

    How many canonical degrees of freedom does a quantum field theory actually use during its Hamiltonian evolution? For a UV/IR-regularised classical scalar field, we address this question directly at the level of phase-space dynamics by identifying the minimal symplectic dimension required to reproduce a single trajectory by an autonomous Hamiltonian system. Using symplectic model order reduction as a structure-preserving diagnostic, we show that for the free scalar field this minimal dimension is controlled not by the volume-extensive number of discretised field variables, but by the much smaller number of distinct normal-mode frequencies below the ultraviolet cutoff. In flat space, this leads to an area-type scaling with the size of the region, up to slowly varying corrections. On geodesic balls in maximally symmetric curved spaces, positive curvature induces mild super-area growth, while negative curvature suppresses the scaling, with the flat result recovered smoothly in the small-curvature limit. Numerical experiments further indicate that this behaviour persists in weakly interacting $\lambda {\varphi }^4$ theory over quasi-integrable time scales. Beyond counting, the reduced dynamics exhibits a distinctive internal structure: it decomposes into independent oscillator blocks, while linear combinations of these blocks generate a larger family of apparent field modes whose Poisson brackets are governed by a projector rather than the identity. This reveals a purely classical and dynamical mechanism by which overlapping degrees of freedom arise, without modifying canonical structures by hand. Our results provide a controlled field-theoretic setting in which area-type scaling and overlap phenomena can be studied prior to quantisation, helping to identify which aspects of such structures--often discussed in holographic contexts--can already arise from classical Hamiltonian dynamics.

    ↳ hep-thgr-qchep-phquant-phPRD(2026)·2 citations
38. 38*

    Generalized Families of QFTs

    T. Daniel Brennan🇺🇸 · Kenneth Intriligator🇺🇸

    RG flows and IR phases of QFTs can be constrained by generalized symmetries and their anomalies. Broken symmetries act on the space of coupling constants of families of theories, and can also have IR-constraining family anomalies. We generalize family anomaly considerations to cases of broken generalized/categorical symmetries, including higher-group and non-invertible symmetries. We consider the anomaly inflow and SymTFTs of such generalized families of QFTs, and their implications for RG flows and constraints on the IR phases. As examples, we apply family anomalies to study the IR phases of $4d$ QCD-like theories deformed by irrelevant, multi-fermion interactions.

    ↳ hep-thcond-mat.str-elhep-phJHEP(2026)·5 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.