Angular Dependence of Jet Quenching Indicates Its Strong Enhancement Near the QCD Phase Transition

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We study dependence of jet quenching on matter density, using 'tomography' of the fireball provided by RHIC data on azimuthal anisotropy v{sub 2} of high p{sub t} hadron yield at different centralities. Slicing the fireball into shells with constant (entropy) density, we derive a 'layer-wise geometrical limit' v{sub 2}{sup max} which is indeed above the data v{sub 2} < v{sub x}{sup max}. Interestingly, the limit is reached only if quenching is dominated by shells with the entropy density exactly in the near-T{sub c} region. We show two models that simultaneously describe the high p{sub t} v{sub 2} and R{sub AA} ... continued below

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Liao, Jinfeng & Shuryak, Edward October 22, 2008.

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We study dependence of jet quenching on matter density, using 'tomography' of the fireball provided by RHIC data on azimuthal anisotropy v{sub 2} of high p{sub t} hadron yield at different centralities. Slicing the fireball into shells with constant (entropy) density, we derive a 'layer-wise geometrical limit' v{sub 2}{sup max} which is indeed above the data v{sub 2} < v{sub x}{sup max}. Interestingly, the limit is reached only if quenching is dominated by shells with the entropy density exactly in the near-T{sub c} region. We show two models that simultaneously describe the high p{sub t} v{sub 2} and R{sub AA} data and conclude that such a description can be achieved only if the jet quenching is few times stronger in the near-T{sub c} region relative to QGP at T > T{sub c}. One possible reason for that may be recent indications that the near-T{sub c} region is a magnetic plasma of relatively light color-magnetic monopoles.

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  • Journal Name: Physical Review Letters

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  • Report No.: LBNL-2313E
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 971346
  • Archival Resource Key: ark:/67531/metadc933627

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  • October 22, 2008

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  • Nov. 13, 2016, 7:26 p.m.

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  • Nov. 18, 2016, 2:17 p.m.

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Liao, Jinfeng & Shuryak, Edward. Angular Dependence of Jet Quenching Indicates Its Strong Enhancement Near the QCD Phase Transition, article, October 22, 2008; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc933627/: accessed October 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.