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Measurement of azimuthal asymmetries in inclusive production of hadron pairs in e^＋e^－ annihilation at √s = 10.58 GeV (2008) |
- Seidl, R.,
- Grosse Perdekamp, M.,
- Ogawa, A.,
- Adachi, I.,
- Aihara, H.,
- Bahinipati, S.,
- Bakich, A. M.,
- Bartel, W.,
- Bitenc, U.,
- Bondar, A.,
- Bozek, A.,
- Sekiya, A.,
- Senyo, K.,
- Sevior, M. E.,
- Shapkin, M.,
- Shen, C. P.,
- Singh, J. B.,
- Stanic, S.,
- Staric, M.,
- Sumiyoshi, T.,
- Urquijo, P.,
- Tanaka, M.,
- Teramoto, Y.,
- Tikhomirov, I.,
- Uehara, S.,
- Uglov, T.,
- Unno, Y.,
- Uno, S.,
- Usov, Y.,
- Varner, G.,
- Vervink, K.,
- Wang, C. H.,
- Wang, P.,
- Wang, X. L.,
- Watanabe, Y.,
- Wedd, R.,
- Won, E.,
- Bracˇko, M.,
- Yabsley, B. D.,
- Yamashita, Y.,
- Zhang, Z. P.,
- Zhilich, V.,
- Zivko, T.,
- Zupanc, A.,
- Zyukova, O.,
- Brodzicka, J.,
- Browder, T. E.,
- Chao, Y.,
- Chen, A.,
- Cheon, B. G.,
- Chistov, R.,
- Choi, Y.,
- Dalseno, J.,
- Dash, M.,
- Drutskoy, A.,
- Eidelman, S.,
- Gabyshev, N.,
- Golob, B.,
- Ha, H.,
- Hayasaka, K.,
- Hayashii, H.,
- Hazumi, M.,
- Heffernan, D.,
- Hoshi, Y.,
- Hyun, H. J.,
- Ishikawa, A.,
- Iwasaki, Y.,
- Kah, D. H.,
- Kaji, H.,
- Kawai, H.,
- Kawasaki, T.,
- Kim, H. J.,
- Kim, H. O.,
- Kim, Y. I.,
- Kim, Y. J.,
- Krizˇan, P.,
- Kumar, R.,
- Lange, J. S.,
- Lee, J. S.,
- Lee, M. J.,
- Lesiak, T.,
- Li, J.,
- Limosani, A.,
- Liu, C.,
- Liventsev, D.,
- Mandl, F.,
- McOnie, S.,
- Medvedeva, T.,
- Miyabayashi, K.,
- Miyake, H.,
- Miyata, H.,
- Miyazaki, Y.,
- Mizuk, R.,
- Moloney, G. R.,
- Nakano, E.,
- Nakazawa, H.,
- Nishida, S.,
- Nitoh, O.,
- Ogawa, S.,
- Ohshima, T.,
- Okuno, S.,
- Pakhlov, P.,
- Pakhlova, G.,
- Palka, H.,
- Park, C.W.,
- Park, H.,
- Park, H. K.,
- Peak, L. S.,
- Piilonen, L. E.,
- Sahoo, H.,
- Sakai, Y.,
- Schneider, O.
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Abstract |
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The Collins effect connects transverse quark spin with a measurable azimuthal asymmetry in the yield of hadronic fragments around the quark’s momentum vector. Using two different reconstruction methods we measure statistically significant azimuthal asymmetries for charged pion pairs in e^+e^- annihilation at center-of-mass energies of 10.52 GeV and 10.58 GeV, which can be attributed to the fragmentation of primordial quarks with transverse spin components. The measurement was performed using a data set of 547 fb^{-1} collected by the Belle detector at KEKB improving the statistics of the previously published results by nearly a factor of 20..
PHYSICAL REVIEW D. v.78, n.3, 2008, p.032011-1-032011-24 |
Publication details |
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