Anomalous U(1) gauge bosons and string physics at the forward physics facility

Luis A. Anchordoqui (1, 2) , Ignatios Antoniadis (3, 4) , Karim Benakli (3) , Dieter Lust (5, 6)

1 CUNY - City University of New York [New York]
2 AMNH - American Museum of Natural History [New York, USA] = Musée américain d'histoire naturelle [New York, USA]
3 LPTHE - Laboratoire de Physique Théorique et Hautes Energies
4 NORDITA - Nordic Institute for Theoretical Physics
5 MPI-P - Max-Planck-Institut für Physik (Werner-Heisenberg-Institut)
6 LMU - Ludwig Maximilian University [Munich] = Ludwig Maximilians Universität München

We show that experiments at the Forward Physics Facility, planned to operate near the ATLAS interaction point during the LHC high-luminosity era, will be able to probe predictions of Little String Theory by searching for anomalous $U(1)$ gauge bosons living in the bulk. The interaction of the abelian broken gauge symmetry with the Standard Model is generated at the one-loop level through kinetic mixing with the photon. Gauge invariant generation of mass for the $U(1)$ gauge boson proceeds via the Higgs mechanism in spontaneous symmetry breaking, or else through anomaly-cancellation appealing to Stückelberg-mass terms. We demonstrate that FASER2 will be able to probe string scales over roughly two orders of magnitude: ${10}^5\lesssim M_s/\mathrm{TeV}\lesssim {10}^7$.

Mots clés: gauge boson: U(1); symmetry: gauge; mixing: kinetic; vertex: primary; invariance: gauge; scale: string; abelian; photon; spontaneous symmetry breaking; interpretation of experiments: CERN LHC Coll; interpretation of experiments: ATLAS; Higgs mechanism; TeV

Domaines: Physique des Hautes Energies - Phénoménologie [hep-ph]; Physique des Hautes Energies - Théorie [hep-th]

Luis A. Anchordoqui, Ignatios Antoniadis, Karim Benakli, Dieter Lust. Anomalous U(1) gauge bosons and string physics at the forward physics facility. Phys.Lett.B, 2022, 832, pp.137253. ⟨10.1016/j.physletb.2022.137253⟩. ⟨hal-03652941⟩