PoS - Proceedings of Science
Volume 449 - The European Physical Society Conference on High Energy Physics (EPS-HEP2023) - Joint T03+T10 Dark Matter + Searches for New Physics
Searches for new physics with the FASER Experiment
J.C. MacDonald*  on behalf of the FASER collaboration
Full text: pdf
Pre-published on: January 29, 2024
Published on: March 21, 2024
FASER, the ForwArd Search ExpeRiment, is an LHC experiment located 480 m downstream of the ATLAS interaction point, along the beam collision axis. FASER was designed, constructed, installed, and commissioned during 2019-2022 and has been taking physics data since the start of LHC Run 3 in July 2022. FASER is designed to search for signatures of physics beyond the Standard Model, in particular new light and very weakly-interacting particles. This talk will briefly present the status of the experiment, including the detector design and performance, before summarising the first results from a search for dark photons. The search uses Run 3 data corresponding to an integrated luminosity of 27.0 fb$^{-1}$, and provides constraints on dark photons with masses $\sim 17-70$ MeV and couplings $\epsilon \sim 2\times 10^{-5} - 1\times 10^{-4}$. The results are also interpreted in the context of a $\mathrm{U}(1)_{\mathrm{B}-\mathrm{L}}$ model, where gauge bosons with masses in the range $\sim 15-40$ MeV and couplings $g_{\mathrm{B}-\mathrm{L}} \sim 5\times 10^{-6} - 2\times 10^{-5}$ are excluded.
DOI: https://doi.org/10.22323/1.449.0039
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