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Full text not available from this repository.Abstract
The influence of the nuclear medium on the production of charged hadrons in semi-inclusive deep-inelastic scattering has been studied by the HERMES experiment at DESY using a 27.5 GeV positron beam. The differential multiplicity of charged hadrons and identified charged pions from nitrogen relative to that from deuterium has been measured as a function of the virtual photon energy nu and the fraction z of this energy transferred to the hadron. There are observed substantial reductions of the multiplicity ratio R-M(h) at low nu and at high z, both of which are well described by a gluon-bremsstrahlung model of hadronization. A significant difference of the nu -dependence of R-M(h) is found between positive and negative A hadrons. This is interpreted in terms of a difference between the formation times of protons and pions, using a phenomenological model to describe the nu- and z-dependence of R-M(h).
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | COLOR TRANSPARENCY; ELECTROMAGNETIC CORRECTIONS; VECTOR-MESONS; LUND MODEL; ELECTROPRODUCTION; TARGETS; QUARKS; MATTER; FRAGMENTATION; ATTENUATION; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Andreas Schäfer |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 31 Jan 2022 14:36 |
| Last Modified: | 31 Jan 2022 14:36 |
| URI: | https://pred.uni-regensburg.de/id/eprint/41454 |
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