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 547fb-1 collected by the Belle detector at KEKB improving the statistics of the previously published results by nearly a factor of 20.
| Original language | English |
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| Article number | 032011 |
| Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |
| Volume | 78 |
| Issue number | 3 |
| DOIs | |
| State | Published - 18 Aug 2008 |