Searching for long-lived light neutralinos and axionlike particles at the SHiNESS experiment

Abstract

Recently Soleti et al. [JHEP03(2024)148] proposed a new experiment called SHiNESS at the upcoming European Spallation Source (ESS) facility, making use of the 2-GeV proton beam there impinging on a fixed target, in order to search for hidden sterile neutrinos that could lie in different mass ranges and arise with distinct signatures. Such signatures include excesses in electron-positron pairs that may originate from displaced decays of long-lived particles (LLPs). At the ESS, the dominant sources of such LLPs are decays at rest of ${\pi }^{+}$ mesons and ${\mu }^{+}$ leptons. We choose to investigate theoretical scenarios of long-lived light neutralinos in the R-parity-violating supersymmetry and long-lived weak-violating electrophilic axionlike particles, as these LLPs can be produced from decays of ${\pi }^{+}$ and ${\mu }^{+}$. Since the ${\pi }^{+}$'s and ${\mu }^{+}$'s decay at rest at the ESS, we compute the spectra of the therefrom produced LLPs, and thus estimate the expected sensitivity reach of SHiNESS to the LLPs in these two scenarios. Our calculation shows that in multiple relevant benchmark scenarios, SHiNESS can probe large parameter regions of these models beyond the existing bounds, in just a couple of years of data-collection time.

14 pages+refs, 6 figures, 2 tables, published in PRD

References in corpus (39)

• Measurement of the fine-structure constant as a test of the Standard Model
• Search for a dark photon in e+e- collisions at BABAR
• Collider Probes of Axion-Like Particles
• Flavor probes of axion-like particles
• First Direct Observation of Collider Neutrinos with FASER at the LHC
• Can neutralinos in the MSSM and NMSSM scenarios still be light?
• Addressing $R_{D^{(\ast )}}$, $R_{K^{(\ast )}}$, muon $g-2$ and ANITA anomalies in a minimal $R$-parity violating supersymmetric framework
• Coherent Elastic Neutrino-Nucleus Scattering at the European Spallation Source
• Baryon Triality and Neutrino Masses from an Anomalous Flavor U(1)
• Probing bilinear R-parity violating supergravity at the LHC
• Supernova bound on Axion-Like Particles coupled with electrons
• Hunting the lightest lightest neutralinos
• Search for Dark Photons with the FASER detector at the LHC
• Challenges for an axion explanation of the muon $g-2$ measurement
• The European Spallation Source neutrino Super Beam Conceptual Design Report
• R-Parity Violation at the LHC
• R-parity Violation and Light Neutralinos at ANUBIS and MAPP
• New Opportunities for Detecting Axion-Lepton Interactions
• Lepton flavour violation from an anomaly-free leptophilic axion-like particle
• Predictions for Neutrinos and New Physics from Forward Heavy Hadron Production at the LHC
• Explaining the MiniBooNE Anomalous Excess via Leptophilic ALP-Sterile Neutrino Coupling
• Revisiting the $B$-physics anomalies in $R$-parity violating MSSM
• Hints of Natural Supersymmetry in Flavor Anomalies?
• The ABC of RPV: Classification of R-Parity Violating Signatures at the LHC for Small Couplings
• Studying the $b\to s{\ell }^{+}{\ell }^{-}$ anomalies and $(g-2{)}_{\mu }$ in $R$-parity violating MSSM framework with the inverse seesaw mechanism
• Enhancing Searches for Heavy QCD Axions via Dimuon Final States
• Long-lived neutral fermions at the DUNE near detector
• Explaining $b\to s{\ell }^{+}{\ell }^{-}$ data by sneutrinos in the $R$-parity violating MSSM
• Searching for a Single Photon from Lightest Neutralino Decays in R-parity-violating Supersymmetry at FASER
• Quark flavor violation and axion-like particles from top-quark decays at the LHC
• Atmospheric axion-like particles at Super-Kamiokande
• Recasting Bounds on Long-lived Heavy Neutral Leptons in Terms of a Light Supersymmetric R-parity Violating Neutralino
• Decays of a bino-like particle in the low-mass regime
• New Limits on Leptophilic Axionlike Particles and Majorons from ArgoNeuT
• Constraints on CP-odd ALP couplings from EDM limits of fermions
• Flavor-Violating ALPs, Electron g-2, and the Electron-Ion Collider
• Searching for sterile neutrinos at the ESS$\nu$SB
• Searching for light neutralinos with a displaced vertex at the LHC
• Search for Hidden Neutrinos at the European Spallation Source: the SHiNESS experiment

Cited by in corpus (3)

• Searching for heavy neutral leptons coupled to axion-like particles at the LHC far detectors and SHiP
• Light Axion-Like Particles at Future Lepton Colliders
• Leptophilic Axion-like Particles at Forward Detectors