A search for pair-produced scalar or vector leptoquarks decaying into a b-quark and a tau-lepton is presented using the full LHC Run 2 (2015–2018) data sample of 139 fb-1 collected with the ATLAS detector in proton–proton collisions at a centre-of-mass energy of 13 TeV. Events in which at least one tau-lepton decays hadronically are considered, and multivariate discriminants are used to extract the signals. No significant deviations from the Standard Model expectation are observed and 95% confidence-level upper limits on the production cross-section are derived as a function of leptoquark mass and branching ratio B into a tau-lepton and b-quark. For scalar leptoquarks, masses below 1460 GeV are excluded assuming B=100%, while for vector leptoquarks the corresponding limit is 1650 GeV (1910 GeV) in the minimal-coupling (Yang–Mills) scenario.

Search for pair production of third-generation leptoquarks decaying into a bottom quark and a τ -lepton with the ATLAS detector / Aad, G., Abbott, B., Abeling, K., Abidi, S.H., Aboulhorma, A., Abramowicz, H., Abreu, H., Abulaiti, Y., Hoffman, A.C.A., Acharya, B.S., Bourdarios, C.A., Adamczyk, L., Adamek, L., Addepalli, S.V., Adelman, J., Adiguzel, A., Adorni, S., Adye, T., Affolder, A.A., Afik, Y., et al.. - In: EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6052. - 83:11(2023), pp. 1-35. [10.1140/epjc/s10052-023-12104-7]

Search for pair production of third-generation leptoquarks decaying into a bottom quark and a τ -lepton with the ATLAS detector

Artoni, G.;Bagnaia, P.;Bauce, M.;Betti, A.;Bini, C.;De Salvo, A.;Di Domenico, A.;Gauzzi, P.;Gentile, S.;Giagu, S.;Gustavino, G.;Ippolito, V.;Lacava, F.;Luci, C.;Martinelli, L.;Morodei, F.;Padovano, G.;Pompa Pacchi, E.;Safai Tehrani, F.;Santi, L.;
2023

Abstract

A search for pair-produced scalar or vector leptoquarks decaying into a b-quark and a tau-lepton is presented using the full LHC Run 2 (2015–2018) data sample of 139 fb-1 collected with the ATLAS detector in proton–proton collisions at a centre-of-mass energy of 13 TeV. Events in which at least one tau-lepton decays hadronically are considered, and multivariate discriminants are used to extract the signals. No significant deviations from the Standard Model expectation are observed and 95% confidence-level upper limits on the production cross-section are derived as a function of leptoquark mass and branching ratio B into a tau-lepton and b-quark. For scalar leptoquarks, masses below 1460 GeV are excluded assuming B=100%, while for vector leptoquarks the corresponding limit is 1650 GeV (1910 GeV) in the minimal-coupling (Yang–Mills) scenario.
2023
LHC; ATLAS; leptoquark
01 Pubblicazione su rivista::01a Articolo in rivista
Search for pair production of third-generation leptoquarks decaying into a bottom quark and a τ -lepton with the ATLAS detector / Aad, G., Abbott, B., Abeling, K., Abidi, S.H., Aboulhorma, A., Abramowicz, H., Abreu, H., Abulaiti, Y., Hoffman, A.C.A., Acharya, B.S., Bourdarios, C.A., Adamczyk, L., Adamek, L., Addepalli, S.V., Adelman, J., Adiguzel, A., Adorni, S., Adye, T., Affolder, A.A., Afik, Y., et al.. - In: EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS. - ISSN 1434-6052. - 83:11(2023), pp. 1-35. [10.1140/epjc/s10052-023-12104-7]
File allegati a questo prodotto
File Dimensione Formato  
Aad_Search-for-pair_2023.pdf

accesso aperto

Note: Articolo su rivista
Tipologia: Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza: Creative commons
Dimensione 5.89 MB
Formato Adobe PDF
5.89 MB Adobe PDF

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/11573/1712124
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 24
  • ???jsp.display-item.citation.isi??? ND
social impact