Heidelberg 2022 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 63: Search for New Particles 4

T 63.8: Vortrag

Mittwoch, 23. März 2022, 18:00–18:15, T-H22

Heavy neutrino search at LHCb — Martino Borsato, Rebecca Gartner, and •Maurice Morgenthaler — Physikalisches Institut - Universität Heidelberg

Neutrino masses could be explained by the existence of heavy neutrinos. These elusive particles might have escaped detection at previous experiments due to their long lifetimes and low production rate. If their mass is in the range of a few GeV, heavy neutrinos are produced copiously from the weak decays of beauty hadrons and can be searched effectively at the world-brightest source of these hadrons: the Large Hadron Collider (LHC). In this talk I will present an ongoing search for heavy neutrinos produced in (semi)leptonic beauty-hadron decays using the dataset collected by the LHCb experiment at the LHC. The search strategy relies on the heavy-neutrino macroscopic lifetime and its decay to a pion and a muon. The sensitivity is maximised by targeting all beauty hadron species (including strange and charmed B mesons) and using a partial reconstruction of the decay. The sensitivity of the search in comparison to other experiments will be discussed.