Aug 12 – 18, 2012
US/Eastern timezone

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Charge dependent azimuthal correlations of K-Pi pairs at STAR

Aug 16, 2012, 4:00 PM
Regency 1/3 and Ambassador

Regency 1/3 and Ambassador

Poster Correlations and fluctuations Poster Session Reception


Charles Riley (Yale University)


Three-particle correlations have been used to probe for local parity violation (LPV) in the quark-gluon plasma (QGP) formed during Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV at RHIC [1]. Further expanding on this analysis, we present our results on looking at these correlations through pairing kaons and pions produced during the collision events (while fixing the third particle to be another pion). The idea behind looking at kaon-pion (K-Pi) correlations is that the two-body correlations between these distinct particles are weaker than those between pions with themselves. It may be that the tendency of two pions to be emitted at small angles to one another can be an important ingredient in a strong interaction background [2]. Hence, looking at K-Pi correlations may reduce potential effects from such backgrounds and possibly other parity-even effects that may contribute to the three-particle correlator. We present charge dependent azimuthal correlations between pions and kaons identified by using the Time-Of-Flight detector as a function of centrality, $\delta\eta$ and $\deltap_{T}$ between pairs in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV. Modifications depending on elliptic flow are also applied to the correlators as an additional measure to possibly reduce P-even background effects on the three-particle correlators. [1] B. I. Abelev et al., Phys. Rev. C81 (2010) 54908. [2] S. Schlichting and S. Pratt, arXiv:1005.5341v3 [nucl-th] (2010).

Primary author

Charles Riley (Yale University)


Alexei Chikanian (CERN) Evan Finch (Unknown) Prof. Jack Sandweiss (Yale University) Richard Majka (Yale University)

Presentation materials