@article{14e40edd919d4eb3aa5720b283b4041c,
title = "Evidence for a single-spin azimuthal asymmetry in semi-inclusive pion electroproduction",
abstract = "Single-spin asymmetries for semi-inclusive pion production in deep-inelastic scattering have been measured for the first time. A significant target-spin asymmetry of the distribution in the azimuthal angle φ of the pion relative to the lepton scattering plane was formed for π+ electroproduction on a longitudinally polarized hydrogen target. The corresponding analyzing power in the sinφ moment of the cross section is 0.022±0.005±0.003. This result can be interpreted as the effect of terms in the cross section involving chiral-odd spin distribution functions in combination with a chiral-odd fragmentation function that is sensitive to the transverse polarization of the fragmenting quark.",
author = "\{The HERMES Collaboration\} and A. Airapetian and N. Akopov and M. Amarian and Aschenauer, \{E. C.\} and H. Avakian and R. Avakian and A. Avetissian and E. Avetissian and B. Bains and C. Baumgarten and M. Beckmann and S. Belostotski and Belz, \{J. E.\} and Th Benisch and S. Bernreuther and N. Bianchi and J. Blouw and H. B{\"o}ttcher and A. Borissov and M. Bouwhuis and J. Brack and S. Brauksiepe and B. Braun and B. Bray and St Brons and W. Br{\"u}ckner and A. Br{\"u}ll and Bruins, \{E. E.W.\} and Bulten, \{H. J.\} and Capitani, \{G. P.\} and P. Carter and P. Chumney and E. Cisbani and Court, \{G. R.\} and Dalpiaz, \{P. F.\} and \{De Sanctis\}, E. and \{De Schepper\}, D. and E. Devitsin and \{de Witt Huberts\}, \{P. K.A.\} and \{Di Nezza\}, P. and M. D{\"u}ren and A. Dvoredsky and G. Elbakian and J. Ely and A. Fantoni and A. Fechtchenko and M. Ferstl and K. Fiedler and Filippone, \{B. W.\} and Makins, \{N. C.R.\}",
year = "2000",
doi = "10.1103/PhysRevLett.84.4047",
language = "English (US)",
volume = "84",
pages = "4047--4051",
journal = "Physical review letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "18",
}