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Torsten ÅKESSON

Torsten Åkesson

Professor Emeritus / Expert

Torsten ÅKESSON

Search for Resonant and Nonresonant Higgs Boson Pair Production in the b b τ+τ- Decay Channel in pp Collisions at s =13 TeV with the ATLAS Detector

Author

  • M Aaboud
  • Torsten Åkesson
  • Simona Bocchetta
  • Eric Corrigan
  • Caterina Doglioni
  • Kristian Gregersen
  • Eva Brottmann Hansen
  • Vincent Hedberg
  • Göran Jarlskog
  • Charles Kalderon
  • Edgar Kellermann
  • Balazs Konya
  • Else Lytken
  • Katja Mankinen
  • Ulf Mjörnmark
  • Ruth Pöttgen
  • Trine Poulsen
  • Oxana Smirnova
  • L Zwalinski
Show all

Summary, in English

A search for resonant and nonresonant pair production of Higgs bosons in the bbτ+τ- final state is presented. The search uses 36.1 fb-1 of pp collision data with s=13 TeV recorded by the ATLAS experiment at the LHC in 2015 and 2016. Decays of the τ-lepton pairs with at least one τ lepton decaying to final states with hadrons and a neutrino are considered. No significant excess above the expected background is observed in the data. The cross-section times branching ratio for nonresonant Higgs boson pair production is constrained to be less than 30.9 fb, 12.7 times the standard model expectation, at 95% confidence level. The data are also analyzed to probe resonant Higgs boson pair production, constraining a model with an extended Higgs sector based on two doublets and a Randall-Sundrum bulk graviton model. Upper limits are placed on the resonant Higgs boson pair production cross-section times branching ratio, excluding resonances X in the mass range 305 GeV

Department/s

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

Publishing year

2018

Language

English

Publication/Series

Physical Review Letters

Volume

121

Issue

19

Document type

Journal article

Publisher

American Physical Society

Topic

  • Subatomic Physics

Keywords

  • Dynamic mechanical analysis
  • Germanium compounds
  • Gravitation
  • Photons
  • Tellurium compounds
  • ATLAS detectors
  • ATLAS experiment
  • Confidence levels
  • Randall Sundrum gravitons
  • Randall-Sundrum
  • Supersymmetric models
  • Tau lepton pairs
  • The standard model
  • Bosons

Status

Published

ISBN/ISSN/Other

  • ISSN: 1079-7114