The Ξ_{c}^{+}π^{-}π^{+} 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 m[Ξ_{c}(2815)^{+}]=2816.65±0.03±0.03±0.23  MeV, Γ[Ξ_{c}(2815)^{+}]=2.07±0.08±0.12  MeV, m[Ξ_{c}(2923)^{+}]=2922.8±0.3±0.5±0.2  MeV, Γ[Ξ_{c}(2923)^{+}]=5.3±0.9±1.4  MeV, m[Ξ_{c}(2970)^{+}]=2968.6±0.5±0.5±0.2  MeV, Γ[Ξ_{c}(2970)^{+}]=31.7±1.7±1.9  MeV, [Ξ_{c}(3080)^{+}]=3076.8±0.7±1.3±0.2  MeV, Γ[Ξ_{c}(3080)^{+}]=6.8±2.3±0.9  MeV, where the uncertainties are statistical, systematic, and due to the limited precision on the Ξ_{c}^{+} mass, respectively. The Ξ_{c}(2923)^{+} baryon is observed for the first time, and is consistent with being the isospin partner of the previously observed Ξ_{c}(2923)^{0} state. Most of the measured parameters are more precise than existing world averages.

Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Abudinen, F., Ackernley, T., Adefisoye, A., et al. (2025). Observation of a New Charmed Baryon Decaying to Ξ_{c}^{+}π^{-}π^{+}. PHYSICAL REVIEW LETTERS, 135(16), 1-14 [10.1103/gghl-m6fm].

Observation of a New Charmed Baryon Decaying to Ξ_{c}^{+}π^{-}π^{+}

Anelli A.;Borsato M.;Calvi M.;Capelli S.;Carniti P.;Fazzini D.;Garcia Pardinas J.;Kirsebom V. S.;Malentacca L.;Martinazzoli L.;Martinelli M.;Minotti A.;Pizzichemi M.;Salomoni M.;
2025

Abstract

The Ξ_{c}^{+}π^{-}π^{+} 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 m[Ξ_{c}(2815)^{+}]=2816.65±0.03±0.03±0.23  MeV, Γ[Ξ_{c}(2815)^{+}]=2.07±0.08±0.12  MeV, m[Ξ_{c}(2923)^{+}]=2922.8±0.3±0.5±0.2  MeV, Γ[Ξ_{c}(2923)^{+}]=5.3±0.9±1.4  MeV, m[Ξ_{c}(2970)^{+}]=2968.6±0.5±0.5±0.2  MeV, Γ[Ξ_{c}(2970)^{+}]=31.7±1.7±1.9  MeV, [Ξ_{c}(3080)^{+}]=3076.8±0.7±1.3±0.2  MeV, Γ[Ξ_{c}(3080)^{+}]=6.8±2.3±0.9  MeV, where the uncertainties are statistical, systematic, and due to the limited precision on the Ξ_{c}^{+} mass, respectively. The Ξ_{c}(2923)^{+} baryon is observed for the first time, and is consistent with being the isospin partner of the previously observed Ξ_{c}(2923)^{0} state. Most of the measured parameters are more precise than existing world averages.
Articolo in rivista - Articolo scientifico
article; baryon; clinical article; diagnosis; drug therapy
English
14-ott-2025
2025
135
16
1
14
161901
none
Aaij, R., Abdelmotteleb, A., Abellan Beteta, C., Abudinen, F., Ackernley, T., Adefisoye, A., et al. (2025). Observation of a New Charmed Baryon Decaying to Ξ_{c}^{+}π^{-}π^{+}. PHYSICAL REVIEW LETTERS, 135(16), 1-14 [10.1103/gghl-m6fm].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/578787
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