Journal
PHYSICS LETTERS B
Volume 693, Issue 1, Pages 11-16Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2010.08.012
Keywords
Semi-inclusive DIS; Single-spin asymmetries; Polarized structure functions; Transversity; Collins function
Funding
- Ministry of Economy
- Ministry of Education and Science of Armenia
- FWO-Flanders and IWT, Belgium
- Natural Sciences and Engineering Research Council of Canada
- National Natural Science Foundation of China
- Alexander von Humboldt Stiftung
- German Bundesministerium fur Bildung und Forschung (BMBF)
- Deutsche Forschungsgemeinschaft (DFG)
- Italian Istituto Nazionale di Fisica Nucleare (INFN)
- MEXT
- JSPS
- G-COE of Japan
- Dutch Foundation
- Russian Academy of Science
- Russian Federal Agency for Science and Innovations
- U.K. Engineering and Physical Sciences Research Council
- Science and Technology Facilities Council
- Scottish Universities Physics Alliance
- U.S. Department of Energy (DOE)
- National Science Foundation (NSF)
- European Community [227431]
Ask authors/readers for more resources
Single-spin asymmetries for pions and charged kaons are measured in semi-inclusive deep-inelastic scattering of positrons and electrons off a transversely nuclear-polarized hydrogen target. The dependence of the cross section on the azimuthal angles of the target polarization (phi s) and the produced hadron (phi) is found to have a substantial sin(phi +phi s) modulation for the production of pi(+), pi(-) and K+. This Fourier component can be interpreted in terms of non-zero transversity distribution functions and non-zero favored and disfavored Collins fragmentation functions with opposite sign. For pi(0) and K- production the amplitude of this Fourier component is consistent with zero. (C) 2010 Elsevier B.V. All rights reserved.
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