Measurement of Azimuthal Asymmetries in Inclusive Production of Hadron Pairs in e+e Annihilation at Belle

R. Seidl et al. (Belle Collaboration)
Phys. Rev. Lett. 96, 232002 – Published 14 June 2006

Abstract

The Collins effect connects transverse quark spin with a measurable azimuthal dependence in the yield of hadronic fragments around the quark’s momentum vector. Using two different reconstruction methods, we find evidence of statistically significant azimuthal asymmetries for charged pion pairs in e+e annihilation at a center-of-mass energy of 10.52 GeV, which can be attributed to a transverse polarization of the primordial quarks. The measurement was performed using a sample of 79×106 hadronic events collected with the Belle detector.

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  • Received 2 March 2006

DOI:https://doi.org/10.1103/PhysRevLett.96.232002

©2006 American Physical Society

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Vol. 96, Iss. 23 — 16 June 2006

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