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| Total Pages | : 5 |
| Release | : 2001 |
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The authors discuss the physics underlying event-by-event fluctuations in relativistic heavy ion collisions. We will argue that the fluctuations of the ratio of positively over negatively charged particles may serve as a unique signature for the Quark Gluon Plasma.
| Author | : Christopher J. Plumberg |
| Publisher | : |
| Total Pages | : 170 |
| Release | : 2016 |
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The relativistic heavy-ion program is dedicated to systematically probing the properties of the atomic nucleus and the theory of quantum chromodynamics at extremely high temperatures and energy densities. Numerous observables have been developed and studied over the past several decades, allowing one to extract valuable information about heavy-ion collisions and their evolution, including total multiplicity, anisotropic flows, mean transverse momentum, interferometric radii, and so on. Many of these observables have been studied on an event-by-event basis, allowing them, along with their event-by-event probability distributions, to be used for constraining the role of event-by-event fluctuations in the evolution of heavy-ion collisions. In this thesis, I discuss the possibility of treating the Hanbury Brown-Twiss radii as event-by-event observables, and consider the ways in which their event-by-event probability distributions might be related to interesting theoretical quantities, such as transport coefficients in the quark-gluon plasma, or used to constrain viable models of the initial state in heavy-ion collisions.
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| Total Pages | : 9 |
| Release | : 2001 |
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We discuss the physics underlying event-by-event fluctuations in relativistic heavy ion collisions. We will emphasize how the fluctuations of particle ratios can be utilized to explore the properties of the matter created in these collisions. In particular, we will argue that the fluctuations of the ratio of positively over negatively charged particles may serve as a unique signature for the Quark Gluon Plasma.
| Author | : Rudolph C. Hwa |
| Publisher | : CRC Press |
| Total Pages | : 338 |
| Release | : 1990 |
| Genre | : Science |
| ISBN | : 9782881247347 |
Papers of the June 1989 meeting in Beijing by the China Center of Advanced Science and Technology. This small book covers nucleus- nucleus collisions, states of the vacuum, and highly relativistic heavy ions in the experimental realm. Theoretical papers deal with quark-gluon plasma, and relativistic heavy ion collisions. Annotation copyrighted by Book News, Inc., Portland, OR
| Author | : Stefan Thomas Heckel |
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| Total Pages | : 0 |
| Release | : 2015 |
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The ALICE detector at the LHC is used to study the properties of the Quark-Gluon Plasma produced in heavy-ion collisions. As a reference measurement, also the analysis of proton-proton (pp) collisions is very important. In the study presented here, event-by-event fluctuations of the mean transverse momentum are analysed in pp collisions at √s = 0.9, 2.76 and 7 TeV, and Pb-Pb collisions at √sNN = 2.76 TeV as a function of the charged-particle multiplicity. In both systems, dynamical fluctuations beyond the statistical expectation are observed. In pp collisions, no significant dependence on collision energy is found, even in comparison to inclusive results at much lower collision energies. Likewise, central A-A collisions show only little dependence on collision energy. The multiplicity dependence observed in peripheral Pb-Pb data is in agreement with that in pp collisions. Going to more central Pb-Pb collisions, a clear deviation from this trend is found, reaching a significant reduction of the fluctuations in most central collisions. Comparisons toMonte Carlo event generators show good agreement in pp, but rather large differences in Pb-Pb collisions.
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| Total Pages | : |
| Release | : 2014 |
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I review recent measurements of a large set of flow observables associated with event-shape fluctuations and collective expansion in heavy ion collisions. First, these flow observables are classified and experiment methods are introduced. The experimental results for each type of observables are then presented and compared to theoretical calculations. A coherent picture of initial condition and collective flow based on linear and non-linear hydrodynamic responses is derived, which qualitatively describe most experimental results. I discuss new types of fluctuation measurements that can further our understanding of the event-shape fluctuations and collective expansion dynamics.
| Author | : Jorge Casalderrey-Solana |
| Publisher | : Cambridge University Press |
| Total Pages | : 469 |
| Release | : 2023-07-31 |
| Genre | : Science |
| ISBN | : 1009403494 |
