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Soft probes of the QGP: Pb-Pb and p-Pb CMS results

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2016
7137.pdf (273.2Kb)
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Milošević, Jovan
CMS Collaboration
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Abstract
The CMS collaboration measured second-order single-particle anisotropy, v(2), using 2-, 4-, 6- and 8-particle correlations as well as the Lee-Yang Zero method in pPb and PbPb collisions. This result shows that the correlations found in the small and highly asymmetric pPb collision system are long-range and have a many-particle origin. Deeper insight into the nature of these correlations is achieved by studying the factorization breaking effect which appears trough a PT-dependent event plane angle, caused by the initial-state fluctuations. The effect is largest for the most central PbPb collisions (up to 20%), while it is on the level of few percent for peripheral PbPb and high-multiplicity pPb events. Hydrodynamics models which include a PT-dependent event plane angle semi-quantitatively describe the data and suggest that the effect is mainly determined by the initial-state conditions.
Keywords:
flow / CMS / two-particle correlations / multi-particle-correlations / factorization breaking
Source:
Nuclear and Particle Physics Proceedings, 2016, 273, 1565-1570
Note:
  • 37th International Conference on High Energy Physics (ICHEP), Jul 02-09, 2014, Valencia, Spain

DOI: 10.1016/j.nuclphysbps.2015.09.253

ISSN: 2405-6014 (print); 1873-3832 (electronic)

WoS: 000390295200251

Scopus: 2-s2.0-84973111585
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URI
http://vinar.vin.bg.ac.rs/handle/123456789/7141
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Vinča

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