Study of P-wave excitations of observed charmed strange baryons

2017/09/30 by Dan-Dan Ye, Dandan Ye, Ze Zhao +1 · 3 citations
Chemistry · Physics and Astronomy · #Atomic physics #Chemistry #Crystallography #Excited state #High-Energy Particle Collisions Research #Order (exchange) #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #hep-ph

paper · pdf · doi:10.1103/physrevd.96.114009

published as Phys. Rev. D 96, 114009 (2017) · 10 pages, 1 figure, 11 tables, RevTex, to appear in Phys.Rev.D

openalex created_date 2017/09/15 · arxiv created 2017/11/16 · openalex publication_date 2017/12/13 · arxiv updated 2017/12/20 · openalex updated_date 2026/08/05

Abstract

Many excited charmed strange baryons such as \mathrm\ensuremathΞ_c(2790), \mathrm\ensuremathΞ_c(2815), \mathrm\ensuremathΞ_c(2930), \mathrm\ensuremathΞ_c(2980), \mathrm\ensuremathΞ_c(3055), \mathrm\ensuremathΞ_c(3080), and \mathrm\ensuremathΞ_c(3123) have been observed. In order to understand their internal structure and to determine their spin parities, the strong decay properties of these baryons as possible P-wave excited \mathrm\ensuremathΞ_c candidates have been systematically studied in a ³P₀ model. The configurations and J^P assignments of \mathrm\ensuremathΞ_c(2790), \mathrm\ensuremathΞ_c(2815), \mathrm\ensuremathΞ_c(2930), \mathrm\ensuremathΞ_c(2980), \mathrm\ensuremathΞ_c(3055), \mathrm\ensuremathΞ_c(3080), and \mathrm\ensuremathΞ_c(3123) have been explored based on recent experimental data. In our analyses, \mathrm\ensuremathΞ_c(3055), \mathrm\ensuremathΞ_c(3080), and \mathrm\ensuremathΞ_c(3123) seem impossible to be the P-wave excited \mathrm\ensuremathΞ_c. \mathrm\ensuremathΞ_c(2790), \mathrm\ensuremathΞ_c(2815), \mathrm\ensuremathΞ_c(2930), and \mathrm\ensuremathΞ_c(2980) may be the P-wave excited \mathrm\ensuremathΞ_c. In particular, \mathrm\ensuremathΞ_c(2790) and \mathrm\ensuremathΞ_c(2815) are very possibly the P-wave excited \mathrm\ensuremathΞ_c1(1/2^\ensuremath-) and \mathrm\ensuremathΞ_c1(3/2^\ensuremath-), respectively. \mathrm\ensuremathΞ_c(2980) may be the P-wave excited \mathrm\ensuremathΞ_c1^\ensuremath'((1)/(2)^\ensuremath-). \mathrm\ensuremathΞ_c(2930) may be the P-wave \mathrm\ensuremathΞ_c0^\ensuremath'((1)/(2)^\ensuremath-), \stackrel\texttildelow\mathrm\ensuremathΞ_c0((1)/(2)^\ensuremath-), \mathrm\ensuremathΞ_c2^\ensuremath'((3)/(2)^\ensuremath-), \mathrm\ensuremathΞ_c2^\ensuremath'((5)/(2)^\ensuremath-), \stackrel\texttildelow\mathrm\ensuremathΞ_c2((3)/(2)^\ensuremath-), or \stackrel\texttildelow\mathrm\ensuremathΞ_c2((5)/(2)^\ensuremath-). Furthermore, some branching fraction ratios related to the internal structure and quark configuration of P-wave \mathrm\ensuremathΞ_c have also been computed. Measurements of these ratios in the future will be helpful to understand these excited \mathrm\ensuremathΞ_c.

Citations

• Decay rates of meson resonances in a quark model
• Progress towards understanding baryon resonances
• Masses of excited heavy baryons in the relativistic quark–diquark picture
• On the mechanism of open-flavor strong decays
• Charmed baryons in a relativistic quark model
• Nature of charmed strange baryons Ξ_c(3055) and Ξ_c(3080)
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• Review of Multibody Charm Analyses
• Measurement of masses of the Ξc(2645) and Ξc(2815) baryons and observation of Ξc(2980)→Ξc(2645)π

Cited by

• New Λb(6072)0 state as a 2S bottom baryon
• Strong decay of Λ _c(2940) Λ c ( 2940 ) as a 2P state in the Λ _c Λ c family
• P-wave single charmed baryons of the SU(3) flavor \bf3_F