Observation of new states decaying into Λc K-π and Λc KS0π

R Chistov; K Abe; 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; Y Chao; A Chen; KF Chen; WT Chen; BG Cheon; Y Choi; YK Choi; A Chuvikov; S Cole; J Dalseno; M Danilov; M Dash; J Dragic; A Drutskoy; S Eidelman; D Epifanov; N Gabyshev; A Garmash; T Gershon; A Go; G Gokhroo; B Golob; A Gorišek; H Ha; J Haba; T Hara; K Hayasaka; H Hayashii; M Hazumi; D Heffernan; T Hokuue; Y Hoshi; S Hou; WS Hou; YB Hsiung; T Iijima; A Imoto; K Inami; A Ishikawa; R Itoh; M Iwasaki; Y Iwasaki; JH Kang; N Katayama; H Kawai; T Kawasaki; HR Khan; H Kichimi; HJ Kim; HO Kim; K Kinoshita; S Korpar; P Križan; P Krokovny; R Kumar; CC Kuo; A Kuzmin; YJ Kwon; G Leder; J Lee; T Lesiak; SW Lin; D Liventsev; F Mandl; D Marlow; T Matsumoto; A Matyja; S McOnie; W Mitaroff; K Miyabayashi; H Miyake; H Miyata; Y Miyazaki; R Mizuk; GR Moloney; T Nagamine; E Nakano

Journal article

Observation of new states decaying into Λc K-π and Λc KS0π

R Chistov, K Abe, 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 Show all

Physical Review Letters | Published : 2006

DOI: 10.1103/PhysRevLett.97.162001

Abstract

We report the first observation of two charmed strange baryons that decay into Λc+K-π+. The broader of the two states is measured to have a mass of 2978.5±2.1±2.0MeV/c2 and a width of 43.5±7.5±7. 0MeV/c2. The mass and width of the narrow state are measured to be 3076.7±0.9±0.5MeV/c2 and 6.2±1.2±0.8MeV/c2, respectively. We also perform a search for the isospin partner states that decay into Λc+KS0π- and observe a significant signal at the mass of 3082.8±1.8±1.5MeV/c2. The data used for this analysis were accumulated at or near the Υ(4S) resonance, using the Belle detector at the e+e- asymmetric-energy collider KEKB. The integrated luminosity of the data sample used is 461.5fb-1. © 2006 The Am..

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