Charge multiplicity asymmetry correlation study searching for local parity violation at RHIC for STAR collaboration
The strong force is one of the four fundamental interactions in particle physics describing the interaction between partons (quarks and gluons) which make up hadrons. The theory of the strong force is called quantum chromodynamics (QCD), which is a quantum field theory of the color charged partons. The force between color charges does not diminish while they are separated. This property causes the color charges to be confined in to hadrons, in ordinary matter. Quark-Gluon Plasma (QGP) is one phase of the QCD matter at extremely high temperature and/or pressure, where the partons are asymptotically free. Experimentally, QGP might be created in ultra relativistic heavy ion collisions [1–4]. It has been suggested that in such deconfined QCD matter, the metastable domains with non-zero topological charge Qw will generate charge separation along the system angular momentum direction caused by chiral magnetic effect (CME). The charge separation direction is random as the sign of Q w is random from domain to domain. The event-by-event charge separation along the system angular momentum direction violates the parity and time-reversal symmetries locally (LPV) [5–10]. In this analysis, we measure the CME/LPV in heavy ion collisions with charge multiplicity asymmetry correlations. (Abstract shortened by ProQuest.)
Wang, Purdue University.
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