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arxiv: 1104.2425 · v3 · submitted 2011-04-13 · ✦ hep-ex

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Observation of transverse polarization asymmetries of charged pion pairs in e+e- annihilation near sqrt s=10.58 GeV

A. Vossen , R. Seidl , I. Adachi , H. Aihara , T. Aushev , V. Balagura , W. Bartel , M. Bischofberger
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A. Bondar M. Bra\v{c}ko T. E. Browder M.-C. Chang A. Chen P. Chen B. G. Cheon K. Cho Y. Choi S. Eidelman M. Feindt V. Gaur N. Gabyshev A. Garmash B. Golob M. Grosse-Perdekamp J. Haba K. Hayasaka Y. Horii Y. Hoshi W.-S. Hou H. J. Hyun K. Inami A. Ishikawa M. Iwabuchi Y. Iwasaki T. Iwashita N. J. Joshi H. Kichimi H. O. Kim M. J. Kim B. R. Ko T Kumita J. S. Lange M. J. Lee S.-H. Lee M. Leitgab Y. Li C. Liu D. Liventsev R. Louvot S. McOnie H. Miyata Y. Miyazaki R. Mizuk G. B. Mohanty E. Nakano S. Nishida O. Nitoh A. Ogawa T. Ohshima S. Okuno G. Pakhlova H. Park H. K. Park M. Petri\v{c} L. E. Piilonen S. Ryu H. Sahoo Y. Sakai O. Schneider C. Schwanda O. Seon M. Shapkin V. Shebalin T.-A. Shibata J.-G. Shiu P. Smerkol Y.-S. Sohn E. Solovieva S. Stani\v{c} M. Stari\v{c} M. Sumihama T. Sumiyoshi Y. Teramoto M. /Uchida S. Uehara T. Uglov Y. Unno S. Uno G. Varner A. Vinokurova C. H. Wang M.-Z. Wang P Wang Y. Watanabe E. Won B. D. Yabsley Y. Yamashita V. Zhilich P. Zhou V. Zhulanov
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classification ✦ hep-ex
keywords fragmentationpairsinterferenceannihilationasymmetriesfunctionneartransverse
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The interference fragmentation function translates the fragmentation of a quark with a transverse projection of the spin into an azimuthal asymmetry of two final-state hadrons. In e+e- annihilation the product of two interference fragmentation functions is measured. We report nonzero asymmetries for pairs of charge-ordered pi+pi- pairs, which indicate a significant interference fragmentation function in this channel. The results are obtained from a 672 fb-1 data sample that contains 711 \times 106 pi+pi- pairs and was collected at and near the ?(4S) resonance, with the Belle detector at the KEKB asymmetric-energy e+e- collider.

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