Year: 2019
Type: article
Abstract: In this paper we estimate the sensitivity of the NA64 experiment to millicharged particles ($\ensuremath{\chi}$). That experimental facility is dedicated to the searching for dark sector particles in missing energy events at the CERN SPS. We consider missing momentum signatures in the $\ensuremath{\simeq}100\text{ }\text{ }\mathrm{GeV}$ electron and muon beams and show that the later one allows to obtain more stringent bounds on the millicharge ${Q}_{\ensuremath{\chi}}$, which for the $\ensuremath{\chi}$ masses $100\text{ }\text{ }\mathrm{MeV}\ensuremath{\le}{m}_{\ensuremath{\chi}}\ensuremath{\le}500\text{ }\text{ }\mathrm{MeV}$ at the level ${Q}_{\ensuremath{\chi}}/e\ensuremath{\lesssim}O({10}^{\ensuremath{-}3})\ensuremath{-}O({10}^{\ensuremath{-}2})$.
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Funder: CERN
OpenAlex ID: W2897410677