Baryon to Meson Ratios on the Near and Away-Side of Jets and their Centrality Dependence at STAR

Abstract

We measure relative abundances of $K_S^0$, $\Lambda$ and $\bar{\Lambda }$ in near-side and away-side cones correlated with triggered high-$p_T$ particles in ${}^{197}$Au + ${}^{197}$Au collisions at $\sqrt{s_{NN}}$ = 200 GeV. The centrality dependence of identified particles in the triggered particle cones is also presented. Particle yields and ratios are extracted on the near-side and away-side of the trigger particle. The associate-particle ratios are studied as a function of the angle relative to the trigger particle azimuth $\Delta \varphi$. Such studies should help elucidate the origin of the modifications in the jet like correlations observed in Au+Au collisions relative to p+p collisions. And these studies also will help understand the variation of local parton densities at the away side. We discuss how these measurements might be related to several scenarios for interactions of fast partons with the medium created in Au+Au collision.

6 pages, 4 figures, Proceedings for SQM 2007 Talk, Levoca, Slovakia, June 24-29, 2007

References in corpus (8)

• Measurements of Strange Particle Production in $p+p$ Collisions at $\sqrt{s}$= 200 GeV
• Identified baryon and meson distributions at large transverse momenta from Au+Au collisions at $\sqrt{s_{{}_{NN}}}=200$ GeV
• Identified hadron spectra at large transverse momentum in p+p and d+Au collisions at \sqrts_NN = 200 GeV
• Di-hadron azimuthal correlation and Mach-like cone structure in parton/hadron transport model
• Delta- phi Delta- eta Correlations in Central Au+Au Collisions at sqrt{s_{NN}} = 200 Gev
• Low- and Intermediate-p${}_T$ Di-hadron Distributions in Au+Au Collisions at $\sqrt{s_{NN}}=200$ GeV from STAR
• Three-Particle Azimuthal Correlations
• Measurements of identified particles at intermediate transverse momentum in the STAR experiment from Au+Au collisions at sqrt{s_{NN}}=200 GeV

Cited by in corpus (3)

• A Very High Momentum Particle Identification Detector
• High pT correlations with strange particles in STAR
• Future Experiments in Relativistic Heavy Ion Collisions