Search for non-resonant Higgs boson pair production in the bbℓνℓν final state with the ATLAS detector in pp collisions at √s = 13 TeV

Research output: Contribution to journalArticlepeer-review

  • External authors:
  • Agni Bethani
  • Brian Cox
  • Jonathan Crane
  • Cinzia Da Via
  • Nicholas Dann
  • Alessandra Forti
  • David Lack
  • Jiri Masik
  • Stephen Menary
  • Emily Orgill
  • Joleen Pater
  • Darren Price
  • Yang Qin
  • Jacob Rawling
  • Nicolas Scharmberg
  • Savanna Shaw
  • Stephen Watts
  • Terence Wyatt
  • The ATLAS Collaboration

Abstract

A search for non-resonant Higgs boson pair production, as predicted by the Standard Model, is presented, where one of the Higgs bosons decays via the channel and the other via one of the
H →bb channels. The analysis selection requires events to have at least two b-tagged jets and exactly two leptons (electrons or muons) with opposite electric charge in the final state. Candidate events consistent with Higgs boson pair production are selected using a multi-class neural network discriminant. The analysis uses 139 fb−1 of pp collision data recorded at a centre-of-mass energy of 13 TeV by the ATLAS detector at the Large Hadron Collider. An observed (expected) upper limit of 1.2 () pb is set on the non-resonant Higgs boson pair production cross-section at 95% confidence level, which is equivalent to 40 () times the value predicted in the Standard Model.

Bibliographical metadata

Original languageEnglish
Article number120
JournalPhysics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume801
Early online date13 Dec 2019
DOIs
Publication statusPublished - 10 Feb 2020