Goeckeler, M. and Haegler, Ph. and Horsley, R. and Nakamura, Y. and Pleiter, D. and Rakow, P. E. L. and Schaefer, A. and Schierholz, G. and Stueben, H. and Zanotti, J. M. (2007) Transverse spin structure of the nucleon from lattice-QCD simulations. PHYSICAL REVIEW LETTERS, 98 (22): 222001. ISSN 0031-9007, 1079-7114
Full text not available from this repository.Abstract
We present the first calculation in lattice QCD of the lowest two moments of transverse spin densities of quarks in the nucleon. They encode correlations between quark spin and orbital angular momentum. Our dynamical simulations are based on two flavors of clover-improved Wilson fermions and Wilson gluons. We find significant contributions from certain quark helicity flip generalized parton distributions, leading to strongly distorted densities of transversely polarized quarks in the nucleon. In particular, based on our results and recent arguments by Burkardt [Phys. Rev. D 72, 094020 (2005)], we predict that the Boer-Mulders function h(1)(perpendicular to), describing correlations of transverse quark spin and intrinsic transverse momentum of quarks, is large and negative for both up and down quarks.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | GENERALIZED PARTON DISTRIBUTIONS; NONPERTURBATIVE RENORMALIZATION; HELICITY FLIP; ASYMMETRIES; OPERATORS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Andreas Schäfer |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 04 Dec 2020 10:42 |
| Last Modified: | 04 Dec 2020 10:42 |
| URI: | https://pred.uni-regensburg.de/id/eprint/32712 |
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