Fri·Jan 2, 2026Friday·January 2, 2026

1. 01*

   Can the FCC-hh prove the B-L gauge symmetry?

   Farinaldo S. Queiroz🇧🇷 · J. Zamora-Saa🇨🇱 · Ricardo C. Silva🇧🇷 · Y.M. Oviedo-Torres🇨🇱

   We present a phenomenological study of the discovery potential at the FCC-hh for a new heavy neutral vector boson, Z', predicted by the $U(1{)}_{B-L}$ gauge symmetry. Focusing on the parameter space currently not excluded by Large Hadron Collider data, we analyze the dilepton production channel $pp\to Z^{\prime }\to l^{+}{l}^{-}$ ($l^{\pm }=e^{\pm },{\mu }^{\pm }$) at a center-of-mass energy of $\sqrt{s}=100$ TeV. Full Monte Carlo simulations was performed for different ($M_{Z^{\prime }}$, $g_{B-L}$) BSM scenarios and relevant Standard Model backgrounds (including irreducible Drell-Yan, diboson, single top-quark and top-quark pair productions) identifying optimal kinematic and angular selection cuts to guide future searches for this type resonance. We estimate the FCC-hh reach for an integrated luminosity of ${\mathcal{L}}_{int}$ = 3~$a{b}^{-1}$. Our results demonstrate that the FCC-hh can exclude Z' masses up to $\sim 40$ TeV with 95\% C.L. for couplings of $g_{B-L}\sim 1$, and up to $\sim 15$ TeV for $g_{B-L}\sim 0.1$. We find the kinematic and angular cuts that optimize the signal over background ratio and achieve a $5\sigma$ signal up to Z' masses of $\sim 30$ TeV. These findings highlight the FCC-hh potential to uncover new physics signals in the high-mass regime.

   hep-phhep-ex0 citations
2. 02*

   Search for a Doubly Charged Scalar at the LHC and FCC-hh

   Leticia Guedes🇧🇷 · Gabriela Hoff🇧🇷 · Farinaldo S. Queiroz🇧🇷 · Y.M. Oviedo-Torres🇨🇱 · Y. Villamizar🇫🇷

   Doubly charged scalars frequently emerge in many well-motivated extensions of the Standard Model, particularly in frameworks that aim to explain the origin of neutrino masses. Their distinct electric charge and clean leptonic signatures make them especially compelling from the standpoint of experimental searches. In this work, we explore the sensitivity of the LHC full run II, including photon-photon fusion, and Future Circular Collider in its hadron-hadron configuration (FCC-hh) to such states, assuming they decay promptly and exclusively into charged leptons either conserving or violating lepton flavor. We find that the FCC-hh, operating at 100 TeV, is uniquely positioned to probe doubly charged scalars with masses up to 7 TeV and possibly establish the mechanism behind neutrino masses.

   hep-phhep-exEPJC(2026)·5 citations
3. 03*

   Prospects for studying the $WH\gamma$ process in $pp$ collisions at the LHC

   Youpeng Wu🇨🇳 · Jie Xiao🇬🇧 · Andrew Michael Levin🇨🇳 · Qiang Li🇨🇳

   The Standard Model of particle physics, though remarkably successful, leaves open several major questions that continue to motivate searches for new phenomena. Multiboson interactions involving the Higgs boson are of special interest as probes of the electroweak Lagrangian where potential new physics may be hiding. In this work, we present a study of the simultaneous production of a W boson, a Higgs bosons and a photon in proton-proton collisions at the Large Hadron Collider. Monte Carlo simulation is performed to model both the signal and the background processes, and detector effects are included according to CMS specifications. Boosted decision trees are employed to optimize the event selection and enhance signal-background discrimination. We estimate that with an integrated luminosity of 440~$\mathrm{f}{\mathrm{b}}^{-1}$, the expected significance for the $WH\gamma$ process is 0.63$\sigma$, projected to reach 1.64$\sigma$ at the High-Luminosity LHC (HL-LHC).

   hep-ph0 citations
4. 04*

   Seesaw-I and II Hybrid $T^{\prime }$ Symmetric Neutrino Masses with Mass Selection Rule

   Takaaki Nomura🇨🇳 · Oleg Popov🇨🇳

   The present manuscript studies a recently proposed new neutrino mixing scheme with a neutrino mass selection rule, $m_{\nu }^{13}+m_{\nu }^{22}+m_{\nu }^{31}=0$, among a neutrino mass matrix elements. The neutrino mass matrix texture is achieved by means of $T^{\prime }$ flavor discrete symmetry extension of the Standard Model gauge group. The model realizing the neutrino mixing pattern consists of a combination of type-I and II seesaw mechanisms in the minimal possible extension of the Standard Model. Stringent predictions are obtained for normal and inverted neutrino mass orderings. Some important predictions include ${\alpha }_2\approx 2\pi$ (best fit), $m_{\text{lightest}}\approx 3-4\times 10^{-4}\text{eV}$, and $m_{ee}^{0\nu \beta \beta }\approx 3\times 10^{-3}\text{eV}$ for normal neutrino mass ordering; $110^{\circ }<{\alpha }_1<170^{\circ }$, $40(220{)}^{\circ }<{\alpha }_2<60(240{)}^{\circ }$, $240^{\circ }<{\delta }_{\text{Dirac}}<310^{\circ }$, and $m_{\text{lightest}}\approx 2\times 10^{-5}-7\times 10^{-3}\text{eV}$ for inverted neutrino mass ordering.

   hep-phhep-ex0 citations
5. 05*

   High Frequency Spectrum of Primordial Gravitational Waves

   Kamil Mudrunka🇯🇵 · Kazunori Nakayama🇯🇵

   During inflation long wavelength gravitational waves are produced, which form stochastic background in the present universe with very wide range of frequencies. Higher frequency gravitational waves never experience super-Hubble-radius regime, but they are also amplified after inflation due to the inflaton oscillation. Taking account of the inflaton dynamics after inflation, the spectrum of such quantum-mechanically produced gravitational waves may extend to much higher frequencies than previously thought. In this paper we calculate the spectrum of high frequency gravitational waves produced during and after inflation in detail, in particular focusing on the connection between the low and high frequency regime, and show that the detailed spectrum can distinguish inflation models.

   hep-phastro-ph.COJCAP(2026)·5 citations
6. 06*

   Anatomy of RHN DM relic in the vanilla scotogenic neutrino mass model

   Sujit Kumar Sahoo🇮🇳 · Narendra Sahu🇮🇳 · Vicky Singh Thounaojam🇮🇳

   The scotogeneic neutrino mass models are very popular choices to generate light neutrino masses via radiative mechanism. In these models, the particles running in the loop are distinguished from the standard model due to an imposed ${\mathcal{Z}}_2$ symmetry under which the loop particles are odd. Therefore, the lightest particle running in the loop can be a viable dark matter candidate. In this paper, we revisit the minimal scotogenic neutrino mass model and study the anatomy of right handed neutrino (RHN) DM relic, taking into account contributions from self-annihilation, co-annihilation, conversion-driven processes, as well as production via the freeze-in mechanism. We impose the constraints from direct detection and collider searches of DM including anomalous magnetic moment of muon, charged lepton flavor violation and low-energy neutrino oscillation data to show that the lightest RHN can be a viable DM in the mass range: $M_h/2\lesssim M_{\mathrm{DM}}\lesssim 2000\mathrm{GeV}$ (thermal DM) and $0.1\mathrm{GeV}\lesssim M_{\mathrm{DM}}\lesssim 1000\mathrm{GeV}$ (non-thermal DM), where $M_h$ denotes the Standard Model Higgs mass and $M_{\mathrm{DM}}$ is the RHN dark matter mass. We also find the displaced vertex signatures of long lived particles which can be probed at future colliders.

   hep-phastro-ph.COhep-ex1 citation
7. 07*

   The Maximal Entanglement Limit in Statistical and High Energy Physics

   Dmitri E. Kharzeev🇺🇸

   These lectures advocate the idea that quantum entanglement provides a unifying foundation for both statistical physics and high-energy interactions. I argue that, at sufficiently long times or high energies, most quantum systems approach a Maximal Entanglement Limit (MEL) in which phases of quantum states become unobservable, reduced density matrices acquire a thermal form, and probabilistic descriptions emerge without invoking ergodicity or classical randomness. Within this framework, the emergence of probabilistic parton model, thermalization in the break-up of confining strings and in high-energy collisions, and the universal small $x$ behavior of structure functions arise as direct consequences of entanglement and geometry of high-dimensional Hilbert space.

   ↳ quant-phhep-phhep-thnucl-ex+1Acta Phys.Polon.B(2026)·7 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.