The Xic+pi-pi+ spectrum is investigated using proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4 fb-1, collected by the LHCb experiment during 2016-2018. Four states are observed with high significance, and their masses and widths are measured to be [formulas presented], where the uncertainties are statistical, systematic, and due to the limited precision on the Xic+ mass, respectively. The Xic(2923)+ baryon is observed for the first time, and is consistent with being the isospin partner of the previously observed Xic(2923)0 state. Most of the measured parameters are more precise than existing world averages.
Observation of a New Charmed Baryon Decaying to Xic+ pi-pi+
Kleijne N.Membro del Collaboration Group
;Morello M. J.Membro del Collaboration Group
;Passaro D.Membro del Collaboration Group
;Riccardi D.Membro del Collaboration Group
;
2025
Abstract
The Xic+pi-pi+ spectrum is investigated using proton-proton collisions at a center-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 5.4 fb-1, collected by the LHCb experiment during 2016-2018. Four states are observed with high significance, and their masses and widths are measured to be [formulas presented], where the uncertainties are statistical, systematic, and due to the limited precision on the Xic+ mass, respectively. The Xic(2923)+ baryon is observed for the first time, and is consistent with being the isospin partner of the previously observed Xic(2923)0 state. Most of the measured parameters are more precise than existing world averages.| File | Dimensione | Formato | |
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