Measurement of azimuthal asymmetries in inclusive production of hadron pairs in e{sup +}e{sup -} annihilation at {radical}(s)=10.58 GeV
Journal Article
·
· Physical Review. D, Particles Fields
- University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (United States)
- RIKEN BNL Research Center, Upton, New York 11973 (United States)
- High Energy Accelerator Research Organization (KEK), Tsukuba (Japan)
- Department of Physics, University of Tokyo, Tokyo (Japan)
- University of Cincinnati, Cincinnati, Ohio 45221 (United States)
- University of Sydney, Sydney, New South Wales (Australia)
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{sup +}e{sup -} 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{sup -1} collected by the Belle detector at KEKB improving the statistics of the previously published results by nearly a factor of 20.
- OSTI ID:
- 21250585
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 78, Issue 3; Other Information: DOI: 10.1103/PhysRevD.78.032011; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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