dorsal/arxiv
View SchemaA Comment on Conical Flow Induced by Heavy-Quark Jets
| Authors | F. Antinori, ~E. V. Shuryak |
|---|---|
| Categories | |
| ArXiv ID | nucl-th/0507046 |
| URL | https://arxiv.org/abs/nucl-th/0507046 |
| DOI | 10.1088/0954-3899/31/12/L01 |
| Journal | J.Phys. G31 (2005) L19 |
Abstract
The suppression of high transverse momentum particles, recently discovered at RHIC, is commonly interpreted as due to parton energy loss. In high energy nuclear collisions, QCD jets would deposit a large fraction of their energy and into the produced matter. The question of how this energy is degraded and whether we can use this phenomenon to probe the properties of the produced matter is now under active discussion. It has been proposed that if this matter, which is now being referred to as a {\em strongly coupled Quark-Gluon Plasma} (sQGP), may behave as a liquid with a very small viscosity. In this case, a very specific collective excitation should be produced, called the ``conical flow'', similar e.g. to the sonic booms generated by the shock waves produced by supersonic planes. The RHIC experiments seem indeed to be obtaining some indication that the production of particles emitted opposite to a high-$p_t$ jet may actually be peaked away from the quenched jet direction, at an angle roughly consistent with the direction expected in case a shock wave is produced (i.e. orthogonal to the Mach cone). In this note we speculate that for tagged heavy-quark jets one may observe a shrinkage of the Mach cone at moderate $p_t$. The experimental observation of such an effect would be a very good test for the validity of the whole picture currently emerging from the study of partonic matter in nuclear collisions.
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"abstract": "The suppression of high transverse momentum particles, recently discovered at\nRHIC, is commonly interpreted as due to parton energy loss. In high energy\nnuclear collisions, QCD jets would deposit a large fraction of their energy and\ninto the produced matter. The question of how this energy is degraded and\nwhether we can use this phenomenon to probe the properties of the produced\nmatter is now under active discussion. It has been proposed that if this\nmatter, which is now being referred to as a {\\em strongly coupled Quark-Gluon\nPlasma} (sQGP), may behave as a liquid with a very small viscosity.\n In this case, a very specific collective excitation should be produced,\ncalled the ``conical flow\u0027\u0027, similar e.g. to the sonic booms generated by the\nshock waves produced by supersonic planes. The RHIC experiments seem indeed to\nbe obtaining some indication that the production of particles emitted opposite\nto a high-$p_t$ jet may actually be peaked away from the quenched jet\ndirection, at an angle roughly consistent with the direction expected in case a\nshock wave is produced (i.e. orthogonal to the Mach cone). In this note we\nspeculate that for tagged heavy-quark jets one may observe a shrinkage of the\nMach cone at moderate $p_t$. The experimental observation of such an effect\nwould be a very good test for the validity of the whole picture currently\nemerging from the study of partonic matter in nuclear collisions.",
"arxiv_id": "nucl-th/0507046",
"authors": [
"F. Antinori",
"~E. V. Shuryak"
],
"categories": [
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],
"doi": "10.1088/0954-3899/31/12/L01",
"journal_ref": "J.Phys. G31 (2005) L19",
"title": "A Comment on Conical Flow Induced by Heavy-Quark Jets",
"url": "https://arxiv.org/abs/nucl-th/0507046"
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