Вы находитесь на старом сайте НГУ. Перейти на новый сайт

ISSN - 15507998, Physical Review D - Particles, Fields, Gravitation and Cosmology, 2007, vol. 75, p. -

High statistics study of the f0(980) resonance in γγ→π +π- production

Mori T., Uehara S., Watanabe Y., Abe K., Abe K., Adachi I., Aihara H., Anipko D., Arinstein K., Aulchenko V., Bakich A. M., Barberio E., Bay A., Bedny I., Belous K., Bitenc U., Bizjak I., Bondar A., Bozek A., Bračko M., Brodzicka J., Browder T. E., Chang M. C., Chang P., Chen A., Chen W. T., Cheon B. G., Chistov R., Choi Y., Choi Y. K., Dalseno J., Dash M., Eidelman S., Epifanov D., Fratina S., Gabyshev N., Gershon T., Golob B., Ha H., Hayasaka K., Hayashii H., Hazumi M., Heffernan D., Hokuue T., Hoshi Y., Hou S., Hou W. S., Iijima T., Ikado K., Imoto A., Inami K., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Kaji H., Kang J. H., Kawai H., Kawasaki T., Khan H. R., Kibayashi A., Kichimi H., Kim Y. J., Korpar S., Križan P., Krokovny P., Kulasiri R., Kumar R., Kuzmin A., Kwon Y. J., Lee M. J., Lee S. E., Lesiak T., Limosani A., Lin S. W., Liventsev D., MacNaughton J., Majumder G., Mandl F., Matsumoto T., Miyake H., Miyata H., Miyazaki Y., Mizuk R., Moloney G. R., Nagasaka Y., Nakao M., Nakazawa H., Natkaniec Z., Nishida S., Nitoh O., Noguchi S., Ogawa S., Ohshima T., Okuno S.

We report on a high statistics measurement of the cross section of the process γγ→π+π- in the π+π- invariant mass range 0.8GeV/c2<W<1.5GeV/c2 with 85.9fb-1 of data collected at s=10.58GeV and 10.52 GeV with the Belle detector. A clear signal for the f0(980) resonance is observed. From a fit to the mass spectrum, the mass, π+π- and two-photon decay widths of the resonance are found to be 985.6-1.5+1.2(stat)-1.6+1.1(syst) MeV/c2, 34.2-11.8+13.9(stat)-2.5+8.8(syst)MeV, and 205-83+95(stat)-117+147(syst) eV, respectively. © 2007 The American Physical Society.