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  • Measurement of masses of th...
    Lesiak, T.; Aihara, H.; Bhardwaj, V.; Bitenc, U.; Blyth, S.; Bozek, A.; Browder, T.E.; Chao, Y.; Chen, A.; Cheon, B.G.; Chistov, R.; Cho, I.-S.; Choi, S.-K.; Dalseno, J.; Dash, M.; Eidelman, S.; Gabyshev, N.; Golob, B.; Haba, J.; Hayasaka, K.; Hazumi, M.; Heffernan, D.; Hoshi, Y.; Hou, W.-S.; Ishikawa, A.; Ishino, H.; Itoh, R.; Iwasaki, M.; Joshi, N.J.; Kah, D.H.; Kang, J.H.; Kawasaki, T.; Kim, S.K.; Korpar, S.; Križan, P.; Krokovny, P.; Kuo, C.C.; Kwon, Y.-J.; Lange, S.; Lee, J.S.; Lee, M.J.; Lee, S.E.; Li, J.; Liu, C.; Liventsev, D.; Mandl, F.; McOnie, S.; Medvedeva, T.; Miyake, H.; Miyata, H.; Miyazaki, Y.; Mizuk, R.; Moloney, G.R.; Nagasaka, Y.; Nakao, M.; Nishida, S.; Nitoh, O.; Nozaki, T.; Ohshima, T.; Ozaki, H.; Palka, H.; Park, C.W.; Peak, L.S.; Pestotnik, R.; Piilonen, L.E.; Sahoo, H.; Sakai, Y.; Schneider, O.; Senyo, K.; Sevior, M.E.; Shapkin, M.; Shibuya, H.; Shwartz, B.; Sokolov, A.; Stanič, S.; Starič, M.; Takasaki, F.; Tanaka, M.; Taylor, G.N.; Teramoto, Y.; Tikhomirov, I.; Trabelsi, K.; Tsuboyama, T.; Uglov, T.; Uno, S.; Urquijo, P.; Varner, G.; Vervink, K.; Wang, C.C.; Wang, C.H.; Wang, P.; Wang, X.L.; Yabsley, B.D.; Yamamoto, H.; Yamashita, Y.; Yamauchi, M.; Zhang, Z.P.; Zhilich, V.; Zhulanov, V.; Zyukova, O.

    Physics letters. B, 07/2008, Letnik: 665, Številka: 1
    Journal Article

    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+,0π−,+ decay modes, while the Ξc(2815)0,+ are reconstructed in the Ξc(2645)+,0π−,+ 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)+,0π−,+.