Study of excited Λb 0 states decaying to Λb 0π+π in proton-proton collisions at s=13TeV

The CMS Collaboration

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24 Citations (Scopus)


A study of excited Λb 0 baryons is reported, based on a data sample collected in 2016–2018 with the CMS detector at the LHC in proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of up to 140fb−1. The existence of four excited Λb 0 states: Λb 0(5912)0, Λb 0(5920)0, Λb 0(6146)0, and Λb 0(6152)0 in the Λb 0π+π mass spectrum is confirmed, and their masses are measured. The Λb 0π+π mass distribution exhibits a broad excess of events in the region of 6040–6100 MeV, whose origin cannot be discerned with the present data.

Original languageEnglish
Article number135345
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Publication statusPublished - 2020 Apr 10


  • Beauty baryon
  • CMS
  • Experimental results
  • Flavor spectroscopy
  • Heavy baryon
  • Heavy flavor
  • Physics

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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