A search for pair production of heavy scalar leptoquarks (LQs), each decaying into a top quark and a τ lepton, is presented. The search considers final states with an electron or a muon, one or two τ leptons that decayed to hadrons, and additional jets. The data were collected in 2016 in proton–proton collisions at s=13Te with the CMS detector at the LHC, and correspond to an integrated luminosity of 35.9fb-1. No evidence for pair production of LQs is found. Assuming a branching fraction of unity for the decay LQ → t τ, upper limits on the production cross section are set as a function of LQ mass, excluding masses below 900Ge at 95% confidence level. These results provide the most stringent limits to date on the production of scalar LQs that decay to a top quark and a τ lepton.

Sirunyan, A., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., et al. (2018). Search for third-generation scalar leptoquarks decaying to a top quark and a τ lepton at √s=13Te. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 78(9) [10.1140/epjc/s10052-018-6143-z].

Search for third-generation scalar leptoquarks decaying to a top quark and a τ lepton at √s=13Te

Benaglia A.;Beschi A.;Brianza L.;Brivio F.;Ciriolo V.;Dinardo M. E.;Fiorendi S.;Ghezzi A.;Govoni P.;Malberti M.;Manzoni R. A.;Moroni L.;Paganoni M.;Pigazzini S.;Ragazzi S.;de Fatis T. T.;Lucchini M. T.;Gerosa R.;Massironi A.;De Guio F.;
2018

Abstract

A search for pair production of heavy scalar leptoquarks (LQs), each decaying into a top quark and a τ lepton, is presented. The search considers final states with an electron or a muon, one or two τ leptons that decayed to hadrons, and additional jets. The data were collected in 2016 in proton–proton collisions at s=13Te with the CMS detector at the LHC, and correspond to an integrated luminosity of 35.9fb-1. No evidence for pair production of LQs is found. Assuming a branching fraction of unity for the decay LQ → t τ, upper limits on the production cross section are set as a function of LQ mass, excluding masses below 900Ge at 95% confidence level. These results provide the most stringent limits to date on the production of scalar LQs that decay to a top quark and a τ lepton.
Articolo in rivista - Articolo scientifico
leptoquarks; top quark;
English
2018
78
9
707
none
Sirunyan, A., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., et al. (2018). Search for third-generation scalar leptoquarks decaying to a top quark and a τ lepton at √s=13Te. THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS, 78(9) [10.1140/epjc/s10052-018-6143-z].
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/319256
Citazioni
  • Scopus 57
  • ???jsp.display-item.citation.isi??? 46
Social impact