dorsal/arxiv
View SchemaFlash of photons from the early stage of heavy-ion collisions
| Authors | Dinesh K. Srivastava, Klaus Geiger |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/9802034 |
| URL | https://arxiv.org/abs/nucl-th/9802034 |
| DOI | 10.1103/PhysRevC.58.1734 |
| Journal | Phys.Rev.C58:1734-1737,1998 |
Abstract
The dynamics of partonic cascades may be an important aspect for particle production in relativistic collisions of nuclei at CERN SPS and BNL RHIC energies. Within the Parton-Cascade Model, we estimate the production of single photons from such cascades due to scattering of quarks and gluons q g -> q gamma, quark-antiquark annihilation q qbar -> g gamma, or gamma gamma, and from electromagnetic brems-strahlung of quarks q -> q gamma. We find that the latter QED branching process plays the dominant role for photon production, similarly as the QCD branchings q -> q g and g -> g g play a crucial role for parton multiplication. We conclude therefore that photons accompanying the parton cascade evolution during the early stage of heavy-ion collisions shed light on the formation of a partonic plasma.
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"abstract": "The dynamics of partonic cascades may be an important aspect for particle\nproduction in relativistic collisions of nuclei at CERN SPS and BNL RHIC\nenergies. Within the Parton-Cascade Model, we estimate the production of single\nphotons from such cascades due to scattering of quarks and gluons q g -\u003e q\ngamma, quark-antiquark annihilation q qbar -\u003e g gamma, or gamma gamma, and from\nelectromagnetic brems-strahlung of quarks q -\u003e q gamma. We find that the latter\nQED branching process plays the dominant role for photon production, similarly\nas the QCD branchings q -\u003e q g and g -\u003e g g play a crucial role for parton\nmultiplication. We conclude therefore that photons accompanying the parton\ncascade evolution during the early stage of heavy-ion collisions shed light on\nthe formation of a partonic plasma.",
"arxiv_id": "nucl-th/9802034",
"authors": [
"Dinesh K. Srivastava",
"Klaus Geiger"
],
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"hep-ph"
],
"doi": "10.1103/PhysRevC.58.1734",
"journal_ref": "Phys.Rev.C58:1734-1737,1998",
"title": "Flash of photons from the early stage of heavy-ion collisions",
"url": "https://arxiv.org/abs/nucl-th/9802034"
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