Nuclear Theory·nucl-th

Wednesday·June 18, 2025

7 papers—4 primary·3 cross-listed

05
Deep-Inelastic Scattering at TeV Energies with LHC Muons
Reinaldo Francener🇧🇷 · Victor P. Goncalves🇧🇷 · Felix Kling🇩🇪 · Peter Krack🇳🇱 · Juan Rojo🇳🇱
The LHC far-forward experiments FASER and SND@LHC have pioneered the detection of TeV-energy neutrinos produced in hard-scattering proton-proton collisions at the LHC. In addition to neutrinos, an intense flux of TeV-energy muons reaches these detectors, representing a dominant background for both neutrino studies and beyond the Standard Model searches. Here we demonstrate that this forward muon flux enables a comprehensive neutral-current deep-inelastic scattering (DIS) program at FASER with a strong kinematical overlap with the Electron Ion Collider. For the Run 3 luminosity of $L_{pp} = 250$ ~fb $^{- 1}$ , more than $1 0^{5}$ inclusive muon DIS events, of which up to $1 0^{4}$ from charm production, are expected at FASER $ν$ . As a representative application, we demonstrate the sensitivity of muon DIS at FASER $ν$ to probe the (intrinsic) charm content of the proton at large- $x$ . We also provide predictions for event yields of muon DIS for future FASER runs and for the proposed Forward Physics Facility.
↳ hep-phhep-exnucl-exnucl-thEPJC(2025)·10 citations
06
Enhancement of axial anomaly effects in hot two-color QCD: FRG approach in the linear sigma model
Gergely Fejős🇭🇺 · Daiki Suenaga🇯🇵
We investigate the thermal properties of hadrons in two-color quantum chromodynamics (QC $_{2}$ D) using the functional renormalization group (FRG) method, with particular focus on modifications of the $U (1)$ axial anomaly effects. The hadrons are described by a linear sigma model (LSM) based on the Pauli-Gürsey $S U (4)$ symmetry, which incorporates both low-lying $0^{\pm}$ mesons and diquark baryons. We find that all quartic couplings are comparably suppressed when physical values of the pion mass and decay constant are taken as inputs, for which a reasonably smooth chiral symmetry restoration at finite temperature is reproduced. Consequently, mass differences among chiral partners remain small. Despite these tiny mass differences, mass degeneracies of chiral partners in the hot medium are clearly demonstrated, consistent with chiral symmetry restoration. Moreover, we find that the couplings responsible for the $U (1)$ axial anomaly are enhanced upon entering the finite temperature regime. Baryonic fluctuations also provide sizable contributions to these enhancements. Finally, the fate of the topological susceptibility in the hot QC $_{2}$ D medium is examined.
↳ hep-phhep-latnucl-thPRD(2025)·5 citations
07
Study of the beyond standard model interaction using Coherent Elastic Neutrino-Nucleus Scattering process
S. P. Behera🇮🇳 · S. Panda🇮🇳 · D. K. Mishra🇮🇳
We have conducted an extensive study that highlights the potential of the Indian Coherent Neutrino-nucleus Scattering Experiment (ICNSE) detector in constraining neutrino-quark interactions that go beyond the standard model. By utilizing reactors with varied core configurations and power outputs as sources for electron antineutrinos, and operating with a target mass of 10 kg over a year, our findings reveal that the ICNSE detector is remarkably effective in narrowing down the vast majority of the Non-standard Interaction (NSI) parameter space. Moreover, incorporating results from two distinct detectors, like sapphire and high-purity germanium, markedly enhances sensitivity by reducing the degeneracies between some pairs of NSI parameters to a smaller region.This research highlights its role in enabling future developments and investigations.
↳ hep-phhep-exnucl-exnucl-thJHEP(2026)·0 citations

Affiliations

first authorsco-authorsvia INSPIRE

Deep-Inelastic Scattering at TeV Energies with LHC Muons

Enhancement of axial anomaly effects in hot two-color QCD: FRG approach in the linear sigma model

Study of the beyond standard model interaction using Coherent Elastic Neutrino-Nucleus Scattering process

Affiliations