Search for low-mass resonances decaying into two jets and produced in association with a photon using pp collisions at TeV with the ATLAS detector

Research output: Contribution to journalArticle

  • External authors:
  • Agni Bethani
  • Alexander Bitadze
  • Jonathan Crane
  • Cinzia Da Via
  • Nicholas Dann
  • Sam Dysch
  • Alessandra Forti
  • Emily Hanson
  • James Howarth
  • David Lack
  • Ivan Lopez Paz
  • Jiri Masik
  • Stephen Menary
  • Alexander Oh
  • Joleen Pater
  • Yvonne Peters
  • Rebecca Pickles
  • Yang Qin
  • Jacob Rawling
  • Nicolas Scharmberg
  • Savanna Shaw
  • Terence Wyatt

Abstract

A search is performed for localised excesses in dijet mass distributions of low-dijet-mass events produced in association with a high transverse energy photon. The search uses up to 79.8 fb−1 of LHC proton–proton collisions collected by the ATLAS experiment at a centre-of-mass energy of 13 TeV during 2015–2017. Two variants are presented: one which makes no jet flavour requirements and one which requires both jets to be tagged as b-jets. The observed mass distributions are consistent with multi-jet processes in the Standard Model. The data are used to set upper limits on the production cross-section for a benchmark model and, separately, on generic Gaussian-shape contributions to the mass distributions, extending the current ATLAS constraints on dijet resonances to the mass range between 225 and 1100 GeV.

Bibliographical metadata

Original languageEnglish
JournalPhysics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics
Early online date1 May 2019
DOIs
Publication statusE-pub ahead of print - 1 May 2019