Theoretical interpretation of Ξc (2970)

Abstract

The open charm strong decay widths and certain ratio of branching fractions of a charmed strange baryon Ξc(2970) are calculated in a P03 model. The results are compatible with the latest experimental data. The theoretical ratio of decay branching fractions R=B[Ξc(2970)+→Ξc(2645)0π+]/B[Ξc(2970)+→Ξc′0π+]≈1.0. The spin parity JP=1/2+ and 3/2+ for different assignments are analyzed. From the results of our calculation, Ξc(2970) can be interpreted as a 2S-wave state with JP(sl)=1/2+(0). The distinctions between the 2S-wave nρ- and nλ-excitation states and between states with sl=0 and sl=1 and between states with total spin 1/2 and 3/2(sl=1) are also discussed.