Long-lived particles decaying to ±∓, with masses between 7 and 50GeV/2 and lifetimes between 2 and 50ps, are searched for by looking at displaced vertices containing electrons and muons of opposite charges. The search is performed using 5.4fb−1 of collisions collected with the LHCb detector at a centre-of-mass energy of √=13TeV. Three mechanisms of production of long-lived particles are considered: the direct pair production from quark interactions, the pair production from the decay of a Standard-Model-like Higgs boson with a mass of 125GeV/2, and the charged current production from an on-shell 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± μ∓ ν / Aaij, R., Beteta, C.A., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., Aidala, C.A., Aiola, S., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Albero, A.A., Aliouche, Z., Alkhazov, G., Cartelle, P.A., Amato, S., Amhis, Y., An, L., et al.. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - 81:3(2021). [10.1140/epjc/s10052-021-08994-0]

Search for long-lived particles decaying to e± μ∓ ν

Capriotti, L.;Casse, G.;Sarti, A.;Sciubba, A.;
2021

Abstract

Long-lived particles decaying to ±∓, with masses between 7 and 50GeV/2 and lifetimes between 2 and 50ps, are searched for by looking at displaced vertices containing electrons and muons of opposite charges. The search is performed using 5.4fb−1 of collisions collected with the LHCb detector at a centre-of-mass energy of √=13TeV. Three mechanisms of production of long-lived particles are considered: the direct pair production from quark interactions, the pair production from the decay of a Standard-Model-like Higgs boson with a mass of 125GeV/2, and the charged current production from an on-shell 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.
2021
branching ratios; Baryon measurements; flavour physics
01 Pubblicazione su rivista::01a Articolo in rivista
Search for long-lived particles decaying to e± μ∓ ν / Aaij, R., Beteta, C.A., Ackernley, T., Adeva, B., Adinolfi, M., Afsharnia, H., Aidala, C.A., Aiola, S., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Albero, A.A., Aliouche, Z., Alkhazov, G., Cartelle, P.A., Amato, S., Amhis, Y., An, L., et al.. - In: THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6044. - 81:3(2021). [10.1140/epjc/s10052-021-08994-0]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1579912
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