TY - JOUR
T1 - Search for New Phenomena in Final States with Two Leptons and One or No b -Tagged Jets at s =13 TeV Using the ATLAS Detector
AU - ATLAS Collaboration
AU - Aad, G.
AU - Abbott, B.
AU - Abbott, D. C.
AU - Abed Abud, A.
AU - Abeling, K.
AU - Abhayasinghe, D. K.
AU - Abidi, S. H.
AU - Abramowicz, H.
AU - Abreu, H.
AU - Abulaiti, Y.
AU - Abusleme Hoffman, A. C.
AU - Acharya, B. S.
AU - Achkar, B.
AU - Adam, L.
AU - Adam Bourdarios, C.
AU - Adamczyk, L.
AU - Adamek, L.
AU - Adelman, J.
AU - Adiguzel, A.
AU - Adorni, S.
AU - Adye, T.
AU - Affolder, A. A.
AU - Afik, Y.
AU - Agapopoulou, C.
AU - Agaras, M. N.
AU - Agarwala, J.
AU - Aggarwal, A.
AU - Agheorghiesei, C.
AU - Aguilar-Saavedra, J. A.
AU - Ahmad, A.
AU - Ahmadov, F.
AU - Ahmed, W. S.
AU - Ai, X.
AU - Aielli, G.
AU - Akatsuka, S.
AU - Akbiyik, M.
AU - Åkesson, T. P.A.
AU - Akimov, A. V.
AU - Al Khoury, K.
AU - Alberghi, G. L.
AU - Albert, J.
AU - Alconada Verzini, M. J.
AU - Alderweireldt, S.
AU - Aleksa, M.
AU - Alexa, C.
AU - Iizawa, T.
AU - Kaji, T.
AU - Mitani, T.
AU - Morinaga, M.
AU - Yorita, K.
N1 - Publisher Copyright:
© 2021 CERN.
PY - 2021/10/1
Y1 - 2021/10/1
N2 - A search for new phenomena is presented in final states with two leptons and one or no b-tagged jets. The event selection requires the two leptons to have opposite charge, the same flavor (electrons or muons), and a large invariant mass. The analysis is based on the full run-2 proton-proton collision dataset recorded at a center-of-mass energy of s=13 TeV by the ATLAS experiment at the LHC, corresponding to an integrated luminosity of 139 fb-1. No significant deviation from the expected background is observed in the data. Inspired by the B-meson decay anomalies, a four-fermion contact interaction between two quarks (b, s) and two leptons (ee or μμ) is used as a benchmark signal model, which is characterized by the energy scale and coupling, Λ and g∗, respectively. Contact interactions with Λ/g∗ lower than 2.0 (2.4) TeV are excluded for electrons (muons) at the 95% confidence level, still far below the value that is favored by the B-meson decay anomalies. Model-independent limits are set as a function of the minimum dilepton invariant mass, which allow the results to be reinterpreted in various signal scenarios.
AB - A search for new phenomena is presented in final states with two leptons and one or no b-tagged jets. The event selection requires the two leptons to have opposite charge, the same flavor (electrons or muons), and a large invariant mass. The analysis is based on the full run-2 proton-proton collision dataset recorded at a center-of-mass energy of s=13 TeV by the ATLAS experiment at the LHC, corresponding to an integrated luminosity of 139 fb-1. No significant deviation from the expected background is observed in the data. Inspired by the B-meson decay anomalies, a four-fermion contact interaction between two quarks (b, s) and two leptons (ee or μμ) is used as a benchmark signal model, which is characterized by the energy scale and coupling, Λ and g∗, respectively. Contact interactions with Λ/g∗ lower than 2.0 (2.4) TeV are excluded for electrons (muons) at the 95% confidence level, still far below the value that is favored by the B-meson decay anomalies. Model-independent limits are set as a function of the minimum dilepton invariant mass, which allow the results to be reinterpreted in various signal scenarios.
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U2 - 10.1103/PhysRevLett.127.141801
DO - 10.1103/PhysRevLett.127.141801
M3 - Article
C2 - 34652194
AN - SCOPUS:85117883498
SN - 0031-9007
VL - 127
JO - Physical Review Letters
JF - Physical Review Letters
IS - 14
M1 - A56
ER -