Study of excited Λ0b states decaying to Λ0bπ+π−in proton-proton collisions at √s=13 TeV

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Type :
Article
Publication Status :
Published
Access :
openAccess
Abstract
A study of excited Lambda(0)(b) 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 Lambda(0)(b) states: Lambda(0)(b) (5912)(0), Lambda(0)(b) (5920)(0), Lambda(0)(b) (6146)(0), and Lambda(0)(b) (6152)(0) in the Lambda(0)(b)pi(+)pi(-) mass spectrum is confirmed, and their masses are measured. The Lambda(0)(b)pi(+)pi(-) mass distribution exhibits a broad excess of events in the region of 6040-6100 MeV, whose origin cannot be discerned with the present data.
Source :
Physics Letters B
Date :
2020-04-10
Volume :
803
Publisher :
Elsevier
URI
http://hdl.handle.net/10679/7195https://www.sciencedirect.com/science/article/pii/S0370269320301490
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