dorsal/arxiv
View SchemaJet conversions in a quark-gluon plasma
| Authors | W. Liu, C. M. Ko, B. W. Zhang |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0607047 |
| URL | https://arxiv.org/abs/nucl-th/0607047 |
| DOI | 10.1103/PhysRevC.75.051901 |
| Journal | Phys.Rev.C75:051901,2007 |
Abstract
Quark and gluon jets traversing through a quark-gluon plasma not only lose their energies but also can undergo flavor conversions. The conversion rates via the elastic $q(\bar q)g\to gq(\bar q)$ and the inelastic $q\bar q\leftrightarrow gg$ scatterings are evaluated in the lowest order in QCD. Including both jet energy loss and conversions in the expanding quark-gluon plasma produced in relativistic heavy ion collisions, we have found a net conversion of quark to gluon jets. This reduces the difference between the nuclear modification factors for quark and gluon jets in central heavy ion collisions and thus enhances the $p/\pi^+$ and ${\bar p}/\pi^-$ ratios at high transverse momentum. However, a much larger net quark to gluon jet conversion rate than the one given by the lowest-order QCD is needed to account for the observed similar ratios in central Au+Au and p+p collisions at same energy. Implications of our results are discussed.
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"abstract": "Quark and gluon jets traversing through a quark-gluon plasma not only lose\ntheir energies but also can undergo flavor conversions. The conversion rates\nvia the elastic $q(\\bar q)g\\to gq(\\bar q)$ and the inelastic $q\\bar\nq\\leftrightarrow gg$ scatterings are evaluated in the lowest order in QCD.\nIncluding both jet energy loss and conversions in the expanding quark-gluon\nplasma produced in relativistic heavy ion collisions, we have found a net\nconversion of quark to gluon jets. This reduces the difference between the\nnuclear modification factors for quark and gluon jets in central heavy ion\ncollisions and thus enhances the $p/\\pi^+$ and ${\\bar p}/\\pi^-$ ratios at high\ntransverse momentum. However, a much larger net quark to gluon jet conversion\nrate than the one given by the lowest-order QCD is needed to account for the\nobserved similar ratios in central Au+Au and p+p collisions at same energy.\nImplications of our results are discussed.",
"arxiv_id": "nucl-th/0607047",
"authors": [
"W. Liu",
"C. M. Ko",
"B. W. Zhang"
],
"categories": [
"nucl-th"
],
"doi": "10.1103/PhysRevC.75.051901",
"journal_ref": "Phys.Rev.C75:051901,2007",
"title": "Jet conversions in a quark-gluon plasma",
"url": "https://arxiv.org/abs/nucl-th/0607047"
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