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Göran Jarlskog

Göran Jarlskog

Professor emeritus

Göran Jarlskog

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

Author

  • G Aad
  • Eric Edward Corrigan
  • Caterina Doglioni
  • Jannik Geisen
  • E. Hansen
  • Vincent Hedberg
  • Göran Jarlskog
  • Balazs Konya
  • Else Lytken
  • Katja Mankinen
  • Caterina Marcon
  • Geoffrey André Adrien Mullier
  • Ruth Pöttgen
  • Eleni Skorda
  • Oxana Smirnova
  • L Zwalinski

Summary, in English

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.

Department/s

  • Particle and nuclear physics
  • eSSENCE: The e-Science Collaboration

Publishing year

2021

Language

English

Publication/Series

Physical Review Letters

Volume

127

Issue

14

Document type

Journal article

Publisher

American Physical Society

Topic

  • Subatomic Physics

Status

Published

ISBN/ISSN/Other

  • ISSN: 1079-7114