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It is a evaluation quantity containing articles written by means of specialists on present theoretical subject matters within the topic of Quark-Gluon Plasma created in heavy-ion collisions at excessive strength. it's the fourth quantity within the sequence with an identical identify sequenced numerically. The articles are written in a pedagogical sort if you want to be useful to a variety of researchers from graduate scholars to mature physicists who've no longer labored formerly at the topic. A reader will be in a position to research from the studies with no need vast wisdom of the historical past literature.
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Org/abstract/PRL/v97/p052301. Copyright 2006 by the American Physical Society. 44 S. S. Gubser et al. histogram also shows an “away-side jet” feature around ∆φ = π which is substantially broader for central gold-gold collisions than for proton-proton. Neither the “near-side jet” nor the “away-side jet” are reconstructed jets in the usual sense; instead, they are ideas that help explain the main features of histograms assembled from millions of events. It is usually assumed that the typical event contributing to the histograms involves a hard scattering event where one parton escaped the medium without much interaction, producing the highly energetic “trigger hadron,” and the other parton interacted substantially with the medium before generating an “associated hadron” in the vicinity of ∆φ = π.
See Fig. 3. As it slows down extra lobe-like features appear until v 2 < 5/13 where the energy buildup is behind the quark, creating an “inverse-bulldozer” effect. See Fig. 4. Recall that the speed of sound in a conformal fluid is v 2 = 1/3, so that this transition occurs at velocities which are higher than the speed of sound. This indicates that the features we are seeing are not hydrodynamic in nature. 63 We will see in Sec. 8 that it is probably the near field of the stress-energy tensor which dominates high-angle emission of hadrons.
7. This “near-side jet” feature can reasonably be supposed to arise from vacuum fragmentation effects. 5 43 3 Fig. 7. (Color online) Top: The STAR analysis64 shows substantial broadening of the awayside jet. Reprinted Fig. 1 with permission from J. , Phys. Rev. Lett. org/abstract/PRL/v95/p152301. Copyright 2005 by the American Physical Society. Bottom: The PHENIX analysis65 shows jet-splitting for sufficiently central events. Reprinted Fig. 2 with permission from S. S. , Phys. Rev. Lett. org/abstract/PRL/v97/p052301.