Measurement of masses of the Ξc (2645) and Ξc (2815) baryons and observation of Ξc (2980) → Ξc (2645) π

T Lesiak; I Adachi; H Aihara; K Arinstein; AM Bakich; V Balagura; E Barberio; I Bedny; K Belous; V Bhardwaj; U Bitenc; S Blyth; A Bozek; M Bračko; J Brodzicka; TE Browder; Y Chao; A Chen; WT Chen; BG Cheon; R Chistov; IS Cho; SK Choi; Y Choi; J Dalseno; M Dash; S Eidelman; N Gabyshev; B Golob; H Ha; J Haba; K Hayasaka; M Hazumi; D Heffernan; Y Hoshi; WS Hou; HJ Hyun; K Inami; A Ishikawa; H Ishino; R Itoh; M Iwasaki; Y Iwasaki; NJ Joshi; DH Kah; H Kaji; JH Kang; H Kawai; T Kawasaki; H Kichimi; HJ Kim; SK Kim; YJ Kim; S Korpar; P Križan; P Krokovny; CC Kuo; YJ Kwon; S Lange; JS Lee; MJ Lee; SE Lee; J Li; SW Lin; C Liu; D Liventsev; F Mandl; S McOnie; T Medvedeva; K Miyabayashi; H Miyake; H Miyata; Y Miyazaki; R Mizuk; GR Moloney; Y Nagasaka; M Nakao; Z Natkaniec; S Nishida; O Nitoh; T Nozaki; S Ogawa; T Ohshima; S Okuno; H Ozaki; G Pakhlova; H Palka; CW Park; HK Park; LS Peak; R Pestotnik; LE Piilonen; H Sahoo; Y Sakai; O Schneider; K Senyo; ME Sevior; M Shapkin; H Shibuya; JG Shiu

Journal article

Measurement of masses of the Ξc (2645) and Ξc (2815) baryons and observation of Ξc (2980) → Ξc (2645) π

T Lesiak, I Adachi, H Aihara, K Arinstein, AM Bakich, V Balagura, E Barberio, I Bedny, K Belous, V Bhardwaj, U Bitenc, S Blyth, A Bozek, M Bračko, J Brodzicka, TE Browder, Y Chao, A Chen, WT Chen, BG Cheon Show all

Physics Letters Section B Nuclear Elementary Particle and High Energy Physics | ELSEVIER SCIENCE BV | Published : 2008

DOI: 10.1016/j.physletb.2008.05.055

Abstract

We report a precise measurement of the masses of the Ξc (2645) and Ξc (2815) baryons using a data sample of 414 fb-1 collected by the Belle Collaboration at the KEKB e+ e- collider. The states Ξc (2645)0, + are observed in the Ξc+, 0 π-, + decay modes, while the Ξc (2815)0, + are reconstructed in the Ξc (2645)+, 0 π-, + decay modes. The following mass splittings are determined: mΞc (2645)+ - mΞc (2645)0 = (- 0.1 ± 0.3 (stat) ± 0.6 (syst)) MeV / c2 and mΞc (2815)+ - mΞc (2815)0 = (- 3.4 ± 1.9 (stat) ± 0.9 (syst)) MeV / c2 with a much better precision than the current world averages. We also observe a new decay mode, Ξc (2980)0, + → Ξc (2645)+, 0 π-, +. © 2008 Elsevier B.V. All rights reserved..

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