Long-lived particles decaying to e±μ∓ν, with masses between 7 and 50 GeV/c2 and lifetimes between 2 and 50 ps, are searched for by looking at displaced vertices containing electrons and muons of opposite charges. The search is performed using 5.4 fb−1 of p p collisions col- lected with the LHCb detector at a centre-of-mass energy of √s = 13 TeV . Three mechanisms of production of long-lived particles are considered: the direct pair produc- tion from quark interactions, the pair production from the decay of a Standard-Model-like Higgs boson with a mass of 125 GeV/c2, and the charged current production from an on-shell W boson with an additional lepton. No evidence of these long-lived states is obtained and upper limits on the production cross-section times branching fraction are set on the different production modes.
Search for long-lived particles decaying to e(+/-)mu(-/+)nu
Bassi, G.Membro del Collaboration Group
;Lusiani, A.Membro del Collaboration Group
;Morello, M. J.Membro del Collaboration Group
;Pajero, T.Membro del Collaboration Group
;Pica, L.Membro del Collaboration Group
;Ribatti, R.Membro del Collaboration Group
;
2021
Abstract
Long-lived particles decaying to e±μ∓ν, with masses between 7 and 50 GeV/c2 and lifetimes between 2 and 50 ps, are searched for by looking at displaced vertices containing electrons and muons of opposite charges. The search is performed using 5.4 fb−1 of p p collisions col- lected with the LHCb detector at a centre-of-mass energy of √s = 13 TeV . Three mechanisms of production of long-lived particles are considered: the direct pair produc- tion from quark interactions, the pair production from the decay of a Standard-Model-like Higgs boson with a mass of 125 GeV/c2, and the charged current production from an on-shell W boson with an additional lepton. No evidence of these long-lived states is obtained and upper limits on the production cross-section times branching fraction are set on the different production modes.File | Dimensione | Formato | |
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Aaij2021_Article_SearchForLong-livedParticlesDe.pdf
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