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ISSN - 00319007, EISSN - 10797114, Physical Review Letters, 2006, vol. 96, p. -

Measurement of Azimuthal Asymmetries in Inclusive Production of Hadron Pairs in e+e- Annihilation at Belle

Seidl R., Hasuko K., Abe K., Adachi I., Aihara H., Anipko D., Asano Y., Aushev T., Bakich A. M., Balagura V., Barberio E., Bartel W., Bay A., Bitenc U., Bizjak I., Blyth S., Bozek A., Bračko M., Browder T. E., Chang P., Chen A., Cheon B. G., Choi Y., Choi Y. K., Chuvikov A., Dalseno J., Danilov M., Dash M., Dragic J., Eidelman S., Fratina S., Gabyshev N., Gershon T., Go A., Gokhroo G., Golob B., Gorišek A., Grosse Perdekamp M., Ha H. C., Hayasaka K., Hayashii H., Hazumi M., Hokuue T., Hoshi Y., Hou S., Hou W. S., Iijima T., Inami K., Ishikawa A., Itoh R., Iwasaki M., Iwasaki Y., Kang J. H., Kapusta P., Katayama N., Kawai H., Kawasaki T., Khan H. R., Kichimi H., Kim S. K., Kim S. M., Kulasiri R., Kumar R., Kuo C. C., Kuzmin A., Kwon Y. J., Lange J. S., Lee J., Lesiak T., Li J., Limosani A., Lin S. W., Liventsev D., Mandl F., Matsumoto T., Matyja A., Mitaroff W., Miyake H., Miyata H., Miyazaki Y., Mizuk R., Mori T., Nakamura I., Nakano E., Nakao M., Natkaniec Z., Nishida S., Nitoh O., Ogawa A., Ogawa S., Ohshima T., Okabe T., Okuno S., Olsen S. L., Ozaki H.

The Collins effect connects transverse quark spin with a measurable azimuthal dependence in the yield of hadronic fragments around the quark’s momentum vector. Using two different reconstruction methods, we find evidence of statistically significant azimuthal asymmetries for charged pion pairs in e+e- annihilation at a center-of-mass energy of 10.52Â.