Search for pair production of third-generation leptoquarks decaying into a bottom quark and a τ-lepton with the ATLAS detector
A search for pair-produced scalar or vector leptoquarks decaying into a b -quark and a τ -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 s = 13 TeV. Events in which at lea...
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Veröffentlicht in: | Eur.Phys.J.C 2023, Vol.83 (11), p.1075 |
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Sprache: | eng |
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Zusammenfassung: | A search for pair-produced scalar or vector leptoquarks decaying into a
b
-quark and a
τ
-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
s
=
13
TeV. Events in which at least one
τ
-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
τ
-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. |
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ISSN: | 1434-6044 1434-6052 1434-6052 |
DOI: | 10.1140/epjc/s10052-023-12104-7 |