Experimental constraints on the spin and parity of the Λc(2880)+

Mizuk, R.; Abe, K.; Adachi, I.; Aihara, H.; Anipko, D.; Aulchenko, V.; Aushev, T.; Bakich, A.M.; Balagura, V.; Barberio, E.; Bay, A.; Bedny, I.; Belous, K.; Bitenc, U.; Bizjak, I.; Blyth, S.; Bondar, A.; Bozek, A.; Bračko, M.; Brodzicka, J.; Browder, T.E.; Chang, M.-C.; Chen, A.; Chen, K.-F.; Chen, W.T.; Cheon, B.G.; Chistov, R.; Choi, Y.; Choi, Y.K.; Cole, S.; Dalseno, J.; Danilov, M.; Drutskoy, A.; Eidelman, S.; Epifanov, D.; Fratina, S.; Gabyshev, N.; Garmash, A.; Gershon, T.; Gokhroo, G.; Golob, B.; Ha, H.; Haba, J.; Hayasaka, K.; Hayashii, H.; Hazumi, M.; Heffernan, D.; Hokuue, T.; Hoshi, Y.; Hou, S.; Hou, W.-S.; Iijima, T.; Ikado, K.; Imoto, A.; Inami, K.; Ishikawa, A.; Itoh, R.; Iwasaki, M.; Iwasaki, Y.; Kaji, H.; Kang, J.H.; Kapusta, P.; Katayama, N.; Khan, H.R.; Kichimi, H.; Kim, Y.J.; Kinoshita, K.; Korpar, S.; Križan, P.; Krokovny, P.; Kulasiri, R.; Kumar, R.; Kuo, C.C.; Kuzmin, A.; Kwon, Y.-J.; Leder, G.; Lee, J.; Lee, M.J.; Lee, S.E.; Lesiak, T.; Lin, S.-W.; Liventsev, D.; Majumder, G.; Mandl, F.; Matsumoto, T.; Matyja, A.; McOnie, S.; Miyake, H.; Miyata, H.; Miyazaki, Y.; Nakao, M.; Natkaniec, Z.; Nishida, S.; Ogawa, S.; Ohshima, T.; Okuno, S.; Onuki, Y.; Ozaki, H.; Pakhlov, P.; Pakhlova, G.; et al.

doi:10.1103/PhysRevLett.98.262001

research article

Experimental constraints on the spin and parity of the Λc(2880)+

Mizuk, R.

•

Abe, K.

•

Adachi, I.

2007

Physical Review Letters

We report the results of several studies of the Λc+π+π-X final state in continuum e+e- annihilation data collected by the Belle detector. An analysis of angular distributions in Λc(2880)+→Σc(2455)0, ++π+,- decays strongly favors a Λc(2880)+ spin assignment of 52 over 32 or 12. We find evidence for Λc(2880)+→Σc(2520)0,++π+,- decay and measure the ratio of Λc(2880)+ partial widths Γ(Σc(2520)π)/Γ(Σc(2455)π)=0.225±0. 062±0.025. This value favors the Λc(2880)+ spin-parity assignment of 52+ over 52-. We also report the first observation of Λc(2940) +→Σc(2455)0,++π+,- decay and measure Λc(2880)+ and Λc(2940)+ mass and width parameters. These studies are based on a 553fb-1 data sample collected at or near the Υ(4S) resonance at the KEKB collider. © 2007 The American Physical Society.