Measurements of the masses and widths of the Σc (2455)0 /++ and Σc (2520)0 /++ baryons

S. H. Lee, B. R. Ko, E. Won, A. Abdesselam, I. Adachi, H. Aihara, D. M. Asner, T. Aushev, R. Ayad, A. M. Bakich, A. Bala, V. Bansal, V. Bhardwaj, B. Bhuyan, G. Bonvicini, A. Bozek, T. E. Browder, D. Červenkov, A. Chen, B. G. CheonR. Chistov, K. Cho, V. Chobanova, S. K. Choi, Y. Choi, D. Cinabro, J. Dalseno, M. Danilov, Z. DoleŽal, Z. Drásal, A. Drutskoy, S. Eidelman, D. Epifanov, H. Farhat, J. E. Fast, T. Ferber, A. Frey, V. Gaur, N. Gabyshev, S. Ganguly, A. Garmash, R. Gillard, Y. M. Goh, B. Golob, H. Hayashii, X. H. He, Y. Hoshi, H. J. Hyun, T. Iijima, A. Ishikawa, R. Itoh, Y. Iwasaki, T. Iwashita, I. Jaegle, T. Julius, J. H. Kang, Y. Kato, T. Kawasaki, C. Kiesling, B. H. Kim, D. Y. Kim, J. B. Kim, J. H. Kim, M. J. Kim, K. Kinoshita, J. Klucar, P. Kodyš, S. Korpar, P. KriŽan, P. Krokovny, T. Kuhr, T. Kumita, Y. J. Kwon, J. S. Lange, Y. Li, L. Li Gioi, J. Libby, D. Liventsev, D. Matvienko, K. Miyabayashi, H. Miyata, A. Moll, T. Mori, R. Mussa, Y. Nagasaka, E. Nakano, M. Nakao, M. Nayak, E. Nedelkovska, N. K. Nisar, S. Nishida, O. Nitoh, S. Ogawa, S. Okuno, P. Pakhlov, G. Pakhlova, H. K. Park, T. K. Pedlar, T. Peng, R. Pestotnik, M. Petrič, L. E. Piilonen, A. Poluektov, E. RibeŽl, M. Ritter, M. Röhrken, A. Rostomyan, S. Ryu, H. Sahoo, T. Saito, K. Sakai, Y. Sakai, S. Sandilya, D. Santel, L. Santelj, T. Sanuki, Y. Sato, O. Schneider, G. Schnell, C. Schwanda, D. Semmler, K. Senyo, O. Seon, M. E. Sevior, M. Shapkin, V. Shebalin, C. P. Shen, T. A. Shibata, J. G. Shiu, A. Sibidanov, Y. S. Sohn, E. Solovieva, S. Stanič, M. Starič, M. Steder, M. Sumihama, T. Sumiyoshi, U. Tamponi, K. Tanida, Y. Teramoto, K. Trabelsi, M. Uchida, S. Uehara, T. Uglov, S. Uno, C. Van Hulse, P. Vanhoefer, G. Varner, K. E. Varvell, A. Vinokurova, M. N. Wagner, C. H. Wang, P. Wang, M. Watanabe, Y. Watanabe, K. M. Williams, Y. Yamashita, S. Yashchenko, Y. Yook, C. Z. Yuan, V. Zhilich, V. Zhulanov, A. Zupanc

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Abstract

We present measurements of the masses and decay widths of the baryonic states Σc(2455)0/++ and Σc(2520)0/++ using a data sample corresponding to an integrated luminosity of 711fb-1 collected with the Belle detector at the KEKB e+e- asymmetric-energy collider operating at the (4S) resonance. We report the mass differences with respect to the Λc+ baryon M(Σc(2455)0)-M(Λc+)=167.29±0.01±0.02MeV/c2, M(Σc(2455)++)-M(Λc+)=167.51±0.01±0.02MeV/c2, M(Σc(2520)0)-M(Λc+)=231.98±0.11±0.04MeV/c2, M(Σc(2520)++)-M(Λc+)=231.99±0.10±0.02MeV/c2,and the decay widths Γ(Σc(2455)0)=1.76±0.04-0.21+0.09MeV/c2, Γ(Σc(2455)++)=1.84±0.04-0.20+0.07MeV/c2,Γ(Σ c(2520)0)=15.41±0.41-0.32+0.20MeV/c2,Γ(Σc(2520)++)=14. 77±0.25-0.30+0.18MeV/c2,where the first uncertainties are statistical and the second are systematic. The isospin mass splittings are measured to be M(Σc(2455)++)-M(Σc(2455)0)=0.22±0.01±0.01MeV/c2 and M(Σc(2520)++)-M(Σc(2520)0)=0.01±0.15±0.03MeV/c2. These results are the most precise to date.

Original languageEnglish
Article number091102
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume89
Issue number9
DOIs
StatePublished - 22 May 2014

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