Multiparticle Correlations In Pb--Pb Collisions At \snn=2.76 Tev

<p>Quantum Chromodynamics, which describe the interactions of quarks and gluons, have been found not to violate global parity symmetry. However, the possibility</p> <p> of local parity violations due to transitions in the vacuum state of QCD is not excluded. The effects of these parity violations could be measured in the</p> <p> hot and dense medium created in the ultrarelativistic heavy ion collisions experiment conducted at the Large Hadron Collider, called a Quark-Gluon Plasma, in which</p> <p> the quarks that compose most of ordinary matter are deconfined. In the strong magnetic fields which permeate the QGP in non-central collisions, parity violation </p> <p> would express itself as a charge asymetry with respect to the reaction plane, a phenomenon called the Chiral Magnetic Effect.</p> <p> The measurements of the charge-dependent correlations in a heavy-ion collisions allows to experimentally probe effects of the CME. These measurements</p> <p> are conducted via the use of the second harmonic two-particle correlator with respect to the reaction plane, \langle\cos(\phi_a+\phi_b-2\psi)\rangle</p> <p> The background affecting these measurements is the consequence of an interplay of strong anisotropic flow and correlations unrelated to the CME.</p> <p> Correlations with respect to the fourth harmonic, \langle\cos(2\phi_a+2\phi_b-4\psi)\rangle, are insensitive to the CME and can be used to estimate</p> <p> the magnitude of these background effects. In this thesis, we present results from charge-dependent correlations with respect to both the second and fourth harmonic event planes measured in Pb+Pb collisions at</p> <p> \sqrt{s_NN} = 2.76 TeV at the LHC using data from the ALICE detector. We also present calculations of the ratio of the fourth to second harmonics</p> <p> based on the blast-wave model, which serve as a baseline to understand how these background effects scale between one harmonic and another.</p>

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Open Access Dissertation

Discipline thesis:degree_discipline

Physics and Astronomy

Year dc:date.available

2014

Author dc:creator

• Mlynarz, Jocelyn

Contributors dc:contributor

• Serger A. Voloshin

• Chiral Magnetic Effect
• Flow
• Heavy Ions
• Local Charge Conservation
• Parity Violation
• Nuclear

Repository record dc:identifier

https://digitalcommons.wayne.edu/oa_dissertations/904

OAI identifier oai:identifier

oai:digitalcommons.wayne.edu:oa_dissertations-1903