Search for a Structure in the B0sπ± Invariant Mass Spectrum with the ATLAS Experiment

Research output: Contribution to journalArticle

  • Authors:
  • ATLAS Collaboration
  • Agni Bethani
  • Rafal Bielski
  • Ian Connelly
  • Brian Cox
  • Cinzia Da Via
  • Nicholas Dann
  • Giulio Forcolin
  • Alessandra Forti
  • James Howarth
  • David Lack
  • Frederick Loebinger
  • Stephen Marsden
  • Jiri Masik
  • Stephen Menary
  • Francisca Munoz Sanchez
  • Alexander Oh
  • Emily Orgill
  • Joleen Pater
  • Andrew Pilkington
  • Darren Price
  • John Raine
  • Jacob Rawling
  • Rhys Roberts
  • Savanna Shaw
  • Lee Tomlinson
  • Stephen Watts
  • Fabian Wilk
  • Terence Wyatt


A search for the narrow structure, X(5568), reported by the D0 Collaboration in the decay sequence X→B0sπ±, B0s→J/ψϕ, is presented. The analysis is based on a data sample recorded with the ATLAS detector at the LHC corresponding to 4.9 fb−1 of pp collisions at 7 TeV and 19.5 fb−1 at 8 TeV. No significant signal was found. Upper limits on the number of signal events, with properties corresponding to those reported by D0, and on the X production rate relative to B0s mesons, ρX, were determined at 95% confidence level. The results are N(X)<382 and ρX<0.015 for B0s mesons with transverse momenta above 10 GeV, and N(X)<356 and ρX<0.016 for transverse momenta above 15 GeV. Limits are also set for potential B0sπ±resonances in the mass range 5550 to 5700 MeV.

Bibliographical metadata

Original languageEnglish
Article number202007
JournalPhysical Review Letters
Issue number20
Publication statusPublished - 18 May 2018

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