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

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

Journal article

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

R Mizuk, K Abe, I Adachi, H Aihara, D Anipko, V Aulchenko, T Aushev, AM Bakich, V Balagura, E Barberio, A Bay, I Bedny, K Belous, U Bitenc, I Bizjak, S Blyth, A Bondar, A Bozek, M Bračko, J Brodzicka Show all

Physical Review Letters | AMER PHYSICAL SOC | Published : 2007

DOI: 10.1103/PhysRevLett.98.262001

Abstract

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 o..

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