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Study of excited Λ0 b states decaying to Λ0 bπ+π− in proton-proton collisions at √s = 13 TeV
CMS Collaboration
CMS Collaboration
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Abstract
A study of excited Λ0b 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 140 fb−1. The existence of four excited Λ0b states: Λ0b(5912)0, Λ0b(5920)0, Λ0b(6146)0, and Λ0b(6152)0 in the Λ0bπ+π− mass spectrum is confirmed, and their masses are measured. The Λ0bπ+π− mass distribution exhibits a broad excess of events in the region of 6040–6100MeV, whose origin cannot be discerned with the present data.
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Date
2020-04-10
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Elsevier
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Keywords
CMS, Physics, Beauty baryon, Heavy baryon, Heavy flavor, Flavor spectroscopy, Experimental results
Citation
Sirunyan A.M. et al. Study of excited Λ0b states decaying to Λ0bπ+π− in proton-proton collisions at √s = 13 TeV. Physics Letters B
Volume 803, 10 April 2020. https://doi.org/10.1016/j.physletb.2020.135345