paper

Study of $P$ -wave excitations of observed charmed strange baryons

arXiv:1709.00689 · doi:10.1103/PhysRevD.96.114009

Abstract

Many excited charmed strange baryons such as $I^_{c} (2790)$ , $I^_{c} (2815)$ , $I^_{c} (2930)$ , $I^_{c} (2980)$ , $I^_{c} (3055)$ , $I^_{c} (3080)$ and $I^_{c} (3123)$ 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 $I^_{c}$ candidates have been systematically studied in a $^{3} P_{0}$ model. The configurations and $J^{P}$ assignments of $I^_{c} (2790)$ , $I^_{c} (2815)$ , $I^_{c} (2930)$ , $I^_{c} (2980)$ , $I^_{c} (3055)$ , $I^_{c} (3080)$ and $I^_{c} (3123)$ have been explored based on recent experimental data. In our analyses, $I^_{c} (3055)$ , $I^_{c} (3080)$ and $I^_{c} (3123)$ seem impossible to be the $P$ -wave excited $I^_{c}$ . $I^_{c} (2790)$ , $I^_{c} (2815)$ , $I^_{c} (2930)$ and $I^_{c} (2980)$ may be the $P$ -wave excited $I^_{c}$ . In particular, $I^_{c} (2790)$ and $I^_{c} (2815)$ are very possibly the $P$ -wave excited $I^_{c 1} (1/ 2^{-})$ and $I^_{c 1} (3/ 2^{-})$ , respectively. $I^_{c} (2980)$ may be the $P$ -wave excited $I^_{c 1}^{^{'}} (\frac{1}{2}^{-})$ . $I^_{c} (2930)$ may be the $P$ -wave $I^_{c 0}^{^{'}} (\frac{1}{2}^{-})$ , $I^~ _{c 0} (\frac{1}{2}^{-})$ , $I^_{c 2}^{^{'}} (\frac{3}{2}^{-})$ , $I^_{c 2}^{^{'}} (\frac{5}{2}^{-})$ , $I^~ _{c 2} (\frac{3}{2}^{-})$ or $I^~ _{c 2} (\frac{5}{2}^{-})$ . Furthermore, some branching fraction ratios related to the internal structure and quark configuration of $P$ -wave $I^_{c}$ have also been computed. Measurements of these ratios in the future will be helpful to understand these excited $I^_{c}$ .

10 pages, 1 figure, 11 tables, RevTex, to appear in Phys.Rev.D

Study of P-wave excitations of observed charmed strange baryons

Abstract

Study of $P$ -wave excitations of observed charmed strange baryons