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Full text not available from this repository.Abstract
A single-spin asymmetry in the azimuthal distribution of neutral pions relative to the lepton scattering plane has been measured for the first time in deep-inelastic scattering of positrons off longitudinally polarized protons. The analyzing power in the sin phi moment of the cross section is 0.019 +/-0.007(stat) 0.003(syst). This result is compared to single-spin asymmetries for charged pion production measured in the same kinematic range. The pi (0) asymmetry is of the same size as the pi (+) asymmetry and shows a similar dependence on the relevant kinematic variables. The asymmetry is described by a phenomenological calculation based on a fragmentation function that represents sensitivity to the transverse polarization of the struck quark.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ODD PARTON DISTRIBUTIONS; FRAGMENTATION FUNCTIONS; NUCLEONS; QUARK; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Andreas Schäfer |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 01 Dec 2021 12:21 |
| Last Modified: | 01 Dec 2021 12:21 |
| URI: | https://pred.uni-regensburg.de/id/eprint/41000 |
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