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.

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

De Angelis C.;Dettori F.;Fabiano F.;Litvinov R.;Manca G.;Oldeman R.;Provenzano D.;Saitta B.;
2025-01-01

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.
File in questo prodotto:
File Dimensione Formato  
gghl-m6fm.pdf

accesso aperto

Tipologia: versione editoriale (VoR)
Dimensione 901.78 kB
Formato Adobe PDF
901.78 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11584/462105
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 0
  • ???jsp.display-item.citation.isi??? ND
social impact