Measurements of the masses and widths of the ${\mathrm{\Sigma }}_c(2455{)}^{0/++}$ and ${\mathrm{\Sigma }}_c(2520{)}^{0/++}$ baryons

Journal Article · Thu May 22 00:00:00 EDT 2014 · Physical Review. D, Particles, Fields, Gravitation and Cosmology

DOI:https://doi.org/10.1103/PhysRevD.89.091102· OSTI ID:1594439

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

Here, we highlight measurements of the masses and decay widths of the baryonic states ${\mathrm{\Sigma }}_c(2455{)}^{0/++}$ and ${\mathrm{\Sigma }}_c(2520{)}^{0/++}$ using a data sample corresponding to an integrated luminosity of $711{\mathrm{fb}}^{-1}$ collected with the Belle detector at the KEKB $e^{+}{e}^{-}$ asymmetric-energy collider operating at the $\mathrm{{\rm Y}}\left(4S\right)$ resonance. We report the mass differences with respect to the ${\mathrm{\Lambda }}_c^{+}$ baryon $M\left({\mathrm{\Sigma }}_c\right(2455{)}^0)-M({\mathrm{\Lambda }}_c^{+})=167.29\pm 0.01\pm 0.02\mathrm{MeV}/c^2,M({\mathrm{\Sigma }}_c\left(2455{)}^{++}\right)-M\left({\mathrm{\Lambda }}_c^{+}\right)=167.51\pm 0.01\pm 0.02\mathrm{MeV}/c^2,M\left({\mathrm{\Sigma }}_c\right(2520{)}^0)-M({\mathrm{\Lambda }}_c^{+})=231.98\pm 0.11\pm 0.04\mathrm{MeV}/c^2,M({\mathrm{\Sigma }}_c\left(2520{)}^{++}\right)-M\left({\mathrm{\Lambda }}_c^{+}\right)=231.99\pm 0.10\pm 0.02\mathrm{MeV}/c^2,$and the decay widths $\mathrm{\Gamma }\left({\mathrm{\Sigma }}_c\right(2455{)}^0)=1.76\pm 0.04_{-0.21}^{+0.09}\mathrm{MeV}/c^2,\mathrm{\Gamma }({\mathrm{\Sigma }}_c\left(2455{)}^{++}\right)=1.84\pm 0.04_{-0.20}^{+0.07}\mathrm{MeV}/c^2,\mathrm{\Gamma }\left({\mathrm{\Sigma }}_c\right(2520{)}^0)=15.41\pm 0.41_{-0.32}^{+0.20}\mathrm{MeV}/c^2,\mathrm{\Gamma }({\mathrm{\Sigma }}_c\left(2520{)}^{++}\right)=14.77\pm 0.25_{-0.30}^{+0.18}\mathrm{MeV}/c^2,$where the first uncertainties are statistical and the second are systematic. The isospin mass splittings are measured to be $M\left({\mathrm{\Sigma }}_c\right(2455{)}^{++})-M({\mathrm{\Sigma }}_c\left(2455{)}^0\right)=0.22\pm 0.01\pm 0.01\mathrm{MeV}/c^2$ and $M\left({\mathrm{\Sigma }}_c\right(2520{)}^{++})-M({\mathrm{\Sigma }}_c\left(2520{)}^0\right)=0.01\pm 0.15\pm 0.03\mathrm{MeV}/c^2$. These results are the most precise to date.

• Research Organization: Virginia Polytechnic Inst. and State Univ. (Virginia Tech), Blacksburg, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP); National Natural Science Foundation of China (NSFC)
• Contributing Organization: Belle Collaboration
• Grant/Contract Number: SC0009973
• OSTI ID: 1594439
• Journal Information: Physical Review. D, Particles, Fields, Gravitation and Cosmology, Vol. 89, Issue 9; ISSN 1550-7998
• Publisher: American Physical Society (APS)
• Country of Publication: United States
• Language: English

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