dorsal/arxiv
View SchemaHadron attenuation in deep inelastic lepton-nucleus scattering
| Authors | T. Falter, W. Cassing, K. Gallmeister, U. Mosel |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0406023 |
| URL | https://arxiv.org/abs/nucl-th/0406023 |
| DOI | 10.1103/PhysRevC.70.054609 |
| Journal | Phys.Rev. C70 (2004) 054609 |
Abstract
We present a detailed theoretical investigation of hadron attenuation in deep inelastic scattering (DIS) off complex nuclei in the kinematic regime of the HERMES experiment. The analysis is carried out in the framework of a probabilistic coupled-channel transport model based on the Boltzmann-Uehling-Uhlenbeck (BUU) equation, which allows for a treatment of the final-state interactions (FSI) beyond simple absorption mechanisms. Furthermore, our event-by-event simulations account for the kinematic cuts of the experiments as well as the geometrical acceptance of the detectors. We calculate the multiplicity ratios of charged hadrons for various nuclear targets relative to deuterium as a function of the photon energy nu, the hadron energy fraction z_h=E_h/nu and the transverse momentum p_T. We also confront our model results on double-hadron attenuation with recent experimental data. Separately, we compare the attenuation of identified hadrons (pi^\pm, \pi^0, K^\pm, p and pbar) on Ne and Kr targets with the data from the HERMES Collaboration and make predictions for a Xe target. At the end we turn towards hadron attenuation on Cu nuclei at EMC energies. Our studies demonstrate that (pre-)hadronic final-state interactions play a dominant role in the kinematic regime of the HERMES experiment while our present approach overestimates the attenuation at EMC energies.
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"abstract": "We present a detailed theoretical investigation of hadron attenuation in deep\ninelastic scattering (DIS) off complex nuclei in the kinematic regime of the\nHERMES experiment. The analysis is carried out in the framework of a\nprobabilistic coupled-channel transport model based on the\nBoltzmann-Uehling-Uhlenbeck (BUU) equation, which allows for a treatment of the\nfinal-state interactions (FSI) beyond simple absorption mechanisms.\nFurthermore, our event-by-event simulations account for the kinematic cuts of\nthe experiments as well as the geometrical acceptance of the detectors. We\ncalculate the multiplicity ratios of charged hadrons for various nuclear\ntargets relative to deuterium as a function of the photon energy nu, the hadron\nenergy fraction z_h=E_h/nu and the transverse momentum p_T. We also confront\nour model results on double-hadron attenuation with recent experimental data.\nSeparately, we compare the attenuation of identified hadrons (pi^\\pm, \\pi^0,\nK^\\pm, p and pbar) on Ne and Kr targets with the data from the HERMES\nCollaboration and make predictions for a Xe target. At the end we turn towards\nhadron attenuation on Cu nuclei at EMC energies. Our studies demonstrate that\n(pre-)hadronic final-state interactions play a dominant role in the kinematic\nregime of the HERMES experiment while our present approach overestimates the\nattenuation at EMC energies.",
"arxiv_id": "nucl-th/0406023",
"authors": [
"T. Falter",
"W. Cassing",
"K. Gallmeister",
"U. Mosel"
],
"categories": [
"nucl-th",
"hep-ph"
],
"doi": "10.1103/PhysRevC.70.054609",
"journal_ref": "Phys.Rev. C70 (2004) 054609",
"title": "Hadron attenuation in deep inelastic lepton-nucleus scattering",
"url": "https://arxiv.org/abs/nucl-th/0406023"
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