Ma, Bo-Qiang and Schmidt, Ivan and Yang, Jian-Jun (2003) Ratio of (Lambda)over-bar/Lambda in semi-inclusive electroproduction. PHYSICS LETTERS B, 574 (1-2). pp. 35-40. ISSN 0370-2693, 1873-2445
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It is shown that the Lambda/Lambda cross section ratio in semi-inclusive electroproduction of Lambda and Lambda hyperons in deep inelastic scattering of charged lepton on a nucleon target, can provide useful information on the quark to A fragmentation functions. This ratio is calculated explicitly in a quark-diquark model, a pQCD based analysis, and an SU(3) symmetry model, with three different options for the contribution from the unfavored fragmentation functions. The x-dependence of this ratio is sensitive to the ratio of unfavored fragmentation functions over favored fragmentation functions, D-u(Lambda) (z)/D-u(Lambda) (z), whereas the z-dependence is sensitive to the flavor structure of the fragmentation functions, i.e., the ratio D-u(Lambda) (z)/D-u(Lambda)(z). Future measurements by the HERMES Collaboration at DESY can discriminate between various cases. (C) 2003 Published by Elsevier B.V.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | LAMBDA-POLARIZATION; PERTURBATION-THEORY; DISTRIBUTIONS; SCATTERING; DEEP; SPIN; NUCLEON; QUARK; FLAVOR; DECAYS; Lambda hyperon; deep inelastic scattering; semi-inclusive electroproduction; fragmentation function |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 27 Jul 2021 11:46 |
| Last Modified: | 27 Jul 2021 11:46 |
| URI: | https://pred.uni-regensburg.de/id/eprint/38419 |
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