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ISSN - 15507998, Physical Review D - Particles, Fields, Gravitation and Cosmology, 2014, vol. 89, p. -

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

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.

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. © 2014 American Physical Society.