Вы находитесь на старом сайте НГУ. Перейти на новый сайт

ISSN - 00319007, EISSN - 10797114, Physical Review Letters, 2013, vol. 111, p. -

Precision measurement of charged pion and kaon differential cross sections in e+e- annihilation at √s=10.52 GeV

Leitgab M., Seidl R., Grosse Perdekamp M., Vossen A., Adachi I., Aihara H., Asner D. M., Aulchenko V., Aushev T., Bakich A. M., Bhuyan B., Bondar A., Bozek A., Bračko M., Brodzicka J., Browder T. E., Chekelian V., Chen A., Chen P., Cheon B. G., Chilikin K., Cho K., Chobanova V., Choi Y., Cinabro D., Dalseno J., Drásal Z., Dutta D., Eidelman S., Epifanov D., Farhat H., Fast J. E., Gaur V., Gabyshev N., Gillard R., Giordano F., Goh Y. M., Golob B., Haba J., Hayasaka K., Hayashii H., Hoshi Y., Hou W. S., Hsiung Y. B., Hyun H. J., Iijima T., Ishikawa A., Itoh R., Jacobs W. W., Julius T., Kang J. H., Kapusta P., Kato E., Kawasaki T., Kim H. J., Kim H. O., Kim J. B., Kim J. H., Kim M. J., Klucar J., Ko B. R., Kodyš P., Kouzes R. T., Križan P., Krokovny P., Kumar R., Kumita T., Kwon Y. J., Lange J. S., Lee S. H., Li Y., Liu Z. Q., Liventsev D., Matvienko D., Miyabayashi K., Miyata H., Mizuk R., Moll A., Muramatsu N., Nakano E., Nakao M., Natkaniec Z., Nayak M., Nedelkovska E., Ng C., Nisar N. K., Nitoh O., Ogawa A., Ogawa S., Ohshima T., Okuno S.

Measurements of inclusive differential cross sections for charged pion and kaon production in e+e- annihilation have been carried out at a center-of-mass energy of √s=10.52 GeV. The measurements were performed with the Belle detector at the KEKB e+e- collider using a data sample containing 113×106 e+e -→qq̄ events, where q={u,d,s,c}. We present charge-integrated differential cross sections dσh±/dz for h±={π±,K±} as a function of the relative hadron energy z=2Eh/√s from 0.2 to 0.98. The combined statistical and systematic uncertainties for π± (K±) are 4% (4%) at z∼0.6 and 15% (24%) at z∼0.9. The cross sections are the first measurements of the z dependence of pion and kaon production for z>0.7 as well as the first precision cross section measurements at a center-of-mass energy far below the Z0 resonance used by the experiments at LEP and SLC. © 2013 American Physical Society.