Heavy Ion Collisions: Achievements and Challenges

By E. Shuryak. 2014

183 citations recorded by the source corpus.

A decade ago brief summary of the field could be formulated as a discovery of strongly-coupled Quark-Gluon-Plasma, sQGP, making a very good liquid with surprisingly small viscosity. Since 2010 we have LHC program, which added a lot to our understanding, and now there seems to be a need to consolidate what we learned and formulate a list of issues to be studied next. Hydrodynamical perturbations, leading to higher harmonics of angular correlations, are identified as long-lived sound waves. Recently studied reactions involving sounds include phonon decays into two ("loop viscosity"), phonon+magnetic field into photons/dileptons (sono-magneto-luminescence), and two phonons into a gravity wave, a penetrating probe of the Big Bang. The mainstream issues in the field now include a quest to study transition between $pp,pA$ and heavy ion $AA$ collisions, with an aim to locate"the smallest drops"of the sQGP displaying collective/hydrodynamics behavior. The issues related to out-of-equilibrium stage of the collisions, and mechanisms of the equilibration, in weak and strong coupling, are also hotly debated.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/967e558f5db9638d595b21d9afe04dc8a644ffcf

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In Nuclear and High Energy Physics

1. Zhangbu Xu
2. Yugang Ma
3. A. Tang
4. Jinhui Chen
5. D. Keane

Citations in the corpus

• Antinuclei in heavy-ion collisions (2018, background): “This phase, called quark-gluon plasma (QGP) [119, 120, 121, 122] persists for only a few times 10−23 seconds and exhibits fluid properties with exceptionally low viscosity [123, 124, 125, 126, 127] and exceptionally high vorticity [128, 129].”