Measurement of azimuthal asymmetries in inclusive production of hadron pairs in e+e- annihilation at s=10.58GeV

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. © 2008 The American Physical Society.

Published in:
Physical Review D - Particles, Fields, Gravitation and Cosmology, 78, 3, 032011
Other identifiers:
Scopus: 2-s2.0-50449100013
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 Record created 2010-11-05, last modified 2018-05-17

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