engleski

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

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: Λb(5912)0, Λb(5920)0, Λb(6146)0, and Λb(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 6040-6100 MeV, whose origin cannot be discerned with the present data.

High energy physics ; Experimental particle physics ; LHC ; CMS ; Particle Physics Experiments ; Physics ; Vector boson scattering ; Hadron-Hadron scattering (experiments) ; Supersymmetry ; Higgs physics ; Particle and resonance production ; B physics ; Particle correlations and fluctuations ; Quarkonium ; Elementary Particles and Fields ; Beyond Standard Model ; Jets ; QCD ; Top physics ; Diboson ; Electroweak ; CKM matrix ; Top quark ; Large detector-systems performance ; Pattern recognition

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