학술논문
Search for long-lived particles decaying to e±μ∓ν
Document Type
article
Author
Aaij, R; Beteta, C Abellán; Ackernley, T; Adeva, B; Adinolfi, M; Afsharnia, H; Aidala, CA; Aiola, S; Ajaltouni, Z; Akar, S; Albrecht, J; Alessio, F; Alexander, M; Albero, A Alfonso; Aliouche, Z; Alkhazov, G; Cartelle, P Alvarez; Amato, S; Amhis, Y; An, L; Anderlini, L; Andreianov, A; Andreotti, M; Archilli, F; Artamonov, A; Artuso, M; Arzymatov, K; Aslanides, E; Atzeni, M; Audurier, B; Bachmann, S; Bachmayer, M; Back, JJ; Baker, S; Rodriguez, P Baladron; Balagura, V; Baldini, W; Leite, J Baptista; Barlow, RJ; Barsuk, S; Barter, W; Bartolini, M; Baryshnikov, F; Basels, JM; Bassi, G; Batsukh, B; Battig, A; Bay, A; Becker, M; Bedeschi, F; Bediaga, I; Beiter, A; Belavin, V; Belin, S; Bellee, V; Belous, K; Belov, I; Belyaev, I; Bencivenni, G; Ben-Haim, E; Berezhnoy, A; Bernet, R; Berninghoff, D; Bernstein, HC; Bertella, C; Bertholet, E; Bertolin, A; Betancourt, C; Betti, F; Bettler, MO; Bezshyiko, Ia; Bhasin, S; Bhom, J; Bian, L; Bieker, MS; Bifani, S; Billoir, P; Birch, M; Bishop, FCR; Bizzeti, A; Bjørn, M; Blago, MP; Blake, T; Blanc, F; Blusk, S; Bobulska, D; Boelhauve, JA; Garcia, O Boente; Boettcher, T; Boldyrev, A; Bondar, A; Bondar, N; Borghi, S; Borisyak, M; Borsato, M; Borsuk, JT; Bouchiba, SA; Bowcock, TJV; Boyer, A; Bozzi, C
Source
European Physical Journal C. 81(3)
Subject
Language
Abstract
Long-lived particles decaying to e±μ∓ν, with masses between 7 and 50GeV/c2 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 pp collisions collected with the LHCb detector at a centre-of-mass energy of s=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/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.