Fries, R. J. and Schäfer, Andreas (1998) Polarized rho mesons and the asymmetry between Delta(d)over-bar(x) and Delta(u)over-bar(x) in the sea of the nucleon. PHYSICS LETTERS B, 443 (1-4). pp. 40-44. ISSN 0370-2693, 1873-2445
Full text not available from this repository.Abstract
We present a calculation of the polarized rho meson cloud in a nucleon using time-ordered perturbation theory in two different Variants advocated in the literature. We calculate the induced difference between the distributions Delta (d)over-bar(x) and Delta (u)over-bar(x). We use a recent lattice calculation to motivate an ansatz for the polarized valence quark distribution of the rho meson. Our calculations show that the two theoretical approaches five vastly different results. We conclude that Delta (d)over-bar(x)-Delta (u)over-bar(x) can be of relevant sire with important consequences for the combined fits of polarized distribution functions. (C) 1998 Elsevier Science B.V. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | LEPTON-NUCLEON SCATTERING; N-C LIMIT; PARTON DISTRIBUTIONS; GOTTFRIED SUM; MODEL; polarized parton distributions; sea quarks; flavor asymmetries in the polarized sea; meson cloud model; Rho meson; time-ordered perturbation theory |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Andreas Schäfer |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 09 Feb 2023 07:22 |
| Last Modified: | 09 Feb 2023 07:22 |
| URI: | https://pred.uni-regensburg.de/id/eprint/49265 |
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