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

Aad, Georges; Abbott, Braden Keim; Abeling, Kira; Abidi, Haider; Aboulhorma, Asmaa; Abramowicz, Halina; Abreu, Henso; Abulaiti, Yiming; Abusleme Hoffman, A.C.; Acharya, Bobby Samir

doi:10.1140/epjc/s10052-023-12104-7

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

ATLAS

Collaboration

Mar 2, 2023

35 pages

Published in:

Eur.Phys.J.C 83 (2023) 11, 1075

Published: Nov 24, 2023

e-Print:

2303.01294 [hep-ex]

DOI:

10.1140/epjc/s10052-023-12104-7 (publication)

PDG: Mass Limits for Leptoquarks from Pair Production

Report number:

CERN-EP-2022-267

Experiments:

CERN-LHC-ATLAS

View in:

datasets

reference search39 citations

Citations per year

Abstract: (Springer)

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

\sqrt{s} =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

\mathcal {B}

into a

\tau

-lepton and b-quark. For scalar leptoquarks, masses below 1460 GeV are excluded assuming

\mathcal {B}=100

%, while for vector leptoquarks the corresponding limit is 1650 GeV (1910 GeV) in the minimal-coupling (Yang–Mills) scenario.

Note:

51 pages in total, author list starting page 34, 10 figures, 5 tables, published in EPJC. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2021-15

p p: colliding beams
family: 3
leptoquark: scalar
p p: scattering
leptoquark: mass
tau: particle identification
tau: hadronic decay
leptoquark: branching ratio
ATLAS
leptoquark: pair production

References(124)

Figures(23)

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