Study of Excited Λ0b States Decaying to Λ0bπ+π− in Proton-Proton Collisions at √s = 13 TeV

Physics Letters B 2020
Viesturs Veckalns

A study of excited Λb0 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 Λb0 states: Λb0(5912)0, Λb0(5920)0, Λb0(6146)0, and Λb0(6152)0 in the Λb0π+π− mass spectrum is confirmed, and their masses are measured. The Λb0π+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.

Keywords
Beauty baryon | CMS | Experimental results | Flavor spectroscopy | Heavy baryon | Heavy flavor | Physics
DOI
10.1016/j.physletb.2020.135345
Hyperlink
https://www.sciencedirect.com/science/article/pii/S0370269320301490?via%3Dihub

Veckalns, V., CERN international group of authors. Study of Excited Λ0b States Decaying to Λ0bπ+π− in Proton-Proton Collisions at √s = 13 TeV. Physics Letters B, 2020, Vol. 803, Article number 135345. ISSN 0370-2693. Available from: doi:10.1016/j.physletb.2020.135345

Publication language
English (en)