Pauli form factor contributions to the inelastic proton bremsstrahlung and dark photon production

Abstract

We study the production of hypothetical vector particles, dark photons ${\gamma }^{\prime }$, with masses in the range 0.4--1.8 GeV via inelastic proton bremsstrahlung. We further develop the approach of arXiv:2409.11089 and refs. [2-3], where for the first time we considered the contributions to the cross section that are associated with the Pauli form factor in $pp{\gamma }^{\prime }$ vertex and obtained new splitting functions. We demonstrate numerically the importance of these corrections to full inelastic proton bremsstrahlung cross section and refine the sensitivity of the ongoing and future fixed-target experiments T2K, DUNE and SHiP to the parameters of dark photon model. A dedicated experiment on measurements of the proton electromagnetic form factors in the time-like region below the proton-antiproton threshold, like those suggested in PANDA at FAIR, would help to obtain the robust predictions for the dark photon production by a proton beam at fixed target.

27 pages, 6 figures, 4 tables, accepted for publication in JHEP, added appendix B with numerical fits for the auxiliary cross sections

References in corpus (12)

• Secluded WIMP Dark Matter
• Light dark matter in neutrino beams: production modelling and scattering signatures at MiniBooNE, T2K and SHiP
• On the pi pi continuum in the nucleon form factors and the proton radius puzzle
• Searching in the dark: the hunt for the dark photon
• Dispersion-theoretical analysis of the electromagnetic form factors of the nucleon: Past, present and future
• Searching for Physics Beyond the Standard Model in an Off-Axis DUNE Near Detector
• Dark Sector Production via Proton Bremsstrahlung
• Sensitivities to feebly interacting particles: public and unified calculations
• Light hadron production in inclusive pp-scattering at LHC
• Dark photon production via elastic proton bremsstrahlung with non-zero momentum transfer
• Off-shell pion properties: electromagnetic form factors and light-front wave functions
• Dark photon emission in elastic proton bremsstrahlung

Cited by in corpus (2)

• Enhancing the Sensitivity to Seesaw Predictions in Gauged $B-L$ Scenarios
• Data-Driven Predictions for Dark Photon and Millicharged Particle Production