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.

Sirunyan, A., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Dragicevic, M., et al. (2020). Study of excited Λb0 states decaying to Λb0π+π− in proton-proton collisions at s=13TeV. PHYSICS LETTERS. SECTION B, 803, 135345 [10.1016/j.physletb.2020.135345].

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

Benaglia A.;Beschi A.;Brivio F.;Ciriolo V.;Dinardo M. E.;Ghezzi A.;Govoni P.;Guzzi L.;Malberti M.;Monti F.;Moroni L.;Paganoni M.;Ragazzi S.;Tabarelli de Fatis T.;Valsecchi D.;Zuolo D.;Lucchini M. T.;De Guio F.;
2020

Abstract

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.
Articolo in rivista - Articolo scientifico
Beauty baryon; CMS; Experimental results; Flavor spectroscopy; Heavy baryon; Heavy flavor; Physics
English
2020
803
135345
135345
none
Sirunyan, A., Tumasyan, A., Adam, W., Ambrogi, F., Bergauer, T., Dragicevic, M., et al. (2020). Study of excited Λb0 states decaying to Λb0π+π− in proton-proton collisions at s=13TeV. PHYSICS LETTERS. SECTION B, 803, 135345 [10.1016/j.physletb.2020.135345].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/274825
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