# Azimuthal anisotropy and correlations at large transverse momenta in $p+p$ and Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV

Abstract : Results on high transverse momentum charged particle emission with respect to the reaction plane are presented for Au+Au collisions at $\sqrt{s_{_{NN}}}$= 200 GeV. Two- and four-particle correlations results are presented as well as a comparison of azimuthal correlations in Au+Au collisions to those in $p+p$ at the same energy. Elliptic anisotropy, $v_2$, is found to reach its maximum at $p_t \sim 3$ GeV/c, then decrease slowly and remain significant up to $p_t\approx 7$ -- 10 GeV/c. Stronger suppression is found in the back-to-back high-$p_t$ particle correlations for particles emitted out-of-plane compared to those emitted in-plane. The centrality dependence of $v_2$ at intermediate $p_t$ is compared to simple models based on jet quenching.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00023223
Contributor : Yvette Heyd <>
Submitted on : Thursday, October 14, 2004 - 9:41:37 AM
Last modification on : Friday, April 9, 2021 - 11:26:02 AM

### Citation

J. Adams, M.M. Aggarwal, Z. Ahammed, J. Amonett, B.D. Anderson, et al.. Azimuthal anisotropy and correlations at large transverse momenta in $p+p$ and Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV. Physical Review Letters, American Physical Society, 2004, 93, pp.252301-1 252301-6. ⟨10.1103/PhysRevLett.93.252301⟩. ⟨in2p3-00023223⟩

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