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Study of excited Λb0 states decaying to Λb0π+π− in proton-proton collisions at at √s=13TeV

Study of excited Λb0 states decaying to Λb0π+π− in proton-proton collisions at at √s=13TeV

CMS Collaboration; Sirunyan, A. M.; DUBE, SOURABH; KANSAL, A.; KAPOOR, A.; KOTHEKAR, K.; PANDEY, S.; RANE, A.; RASTOGI, A.; SHARMA, SEEMA et al.
URI: http://dr.iiserpune.ac.in:8080/xmlui/handle/123456789/4552
https://doi.org/10.1016/j.physletb.2020.135345
Date: 2020-04


Abstract:

A study of excited 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. The existence of four excited states: , , , and in the mass spectrum is confirmed, and their masses are measured. The mass distribution exhibits a broad excess of events in the region of 6040–6100 MeV, whose origin cannot be discerned with the present data.

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