dorsal/arxiv
View SchemaCoulomb Effect: A Possible Probe for the Evolution of Hadronic Matter
| Authors | T. Osada, Y. Hama |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9902027 |
| URL | https://arxiv.org/abs/nucl-th/9902027 |
| DOI | 10.1103/PhysRevC.60.034904 |
| Journal | Phys.Rev. C60 (1999) 034904 |
Abstract
Electromagnetic field produced in high-energy heavy-ion collisions contains much useful information, because the field can be directly related to the motion of the matter in the whole stage of the reaction. One can divide the total electromagnetic field into three parts, i.e., the contributions from the incident nuclei, non-participating nucleons and charged fluid, the latter consisting of strongly interacting hadrons or quarks. Parametrizing the space-time evolution of the charged fluid based on hydrodynamic model, we study the development of the electromagnetic field which accompanies the high-energy heavy-ion collisions. We found that the incident nuclei bring a rather strong electromagnetic field to the interaction region of hadrons or quarks over a few fm after the collision. On the other hand, the observed charged hadrons' spectra are mostly affected (Coulomb effect) by the field of the charged fluid. We compare the result of our model with experimental data and found that the model reproduces them well. The pion yield ratio pi^-/pi+ at a RHIC energy, Au+Au 100+100 GeV/nucleon, is also predicted.
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"abstract": "Electromagnetic field produced in high-energy heavy-ion collisions contains\nmuch useful information, because the field can be directly related to the\nmotion of the matter in the whole stage of the reaction. One can divide the\ntotal electromagnetic field into three parts, i.e., the contributions from the\nincident nuclei, non-participating nucleons and charged fluid, the latter\nconsisting of strongly interacting hadrons or quarks. Parametrizing the\nspace-time evolution of the charged fluid based on hydrodynamic model, we study\nthe development of the electromagnetic field which accompanies the high-energy\nheavy-ion collisions. We found that the incident nuclei bring a rather strong\nelectromagnetic field to the interaction region of hadrons or quarks over a few\nfm after the collision. On the other hand, the observed charged hadrons\u0027\nspectra are mostly affected (Coulomb effect) by the field of the charged fluid.\nWe compare the result of our model with experimental data and found that the\nmodel reproduces them well. The pion yield ratio pi^-/pi+ at a RHIC energy,\nAu+Au 100+100 GeV/nucleon, is also predicted.",
"arxiv_id": "nucl-th/9902027",
"authors": [
"T. Osada",
"Y. Hama"
],
"categories": [
"nucl-th",
"hep-ph"
],
"doi": "10.1103/PhysRevC.60.034904",
"journal_ref": "Phys.Rev. C60 (1999) 034904",
"title": "Coulomb Effect: A Possible Probe for the Evolution of Hadronic Matter",
"url": "https://arxiv.org/abs/nucl-th/9902027"
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