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Abstract

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.

Journal

  • PHYSICAL REVIEW D

    PHYSICAL REVIEW D 78(3), 032011-032011, 2008-08

    American Physical Society

Codes

  • NII Article ID (NAID)
    120001151540
  • Text Lang
    ENG
  • Article Type
    journal article
  • ISSN
    1550-7998
  • Data Source
    IR 
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