# Jet Structure from Dihadron Correlations in d+Au collisions at $\sqrt{S-{NN}}$=200 GeV

Abstract : Dihadron correlations at high transverse momentum in d+Au collisions at sqrt(s_NN) = 200 GeV at midrapidity are measured by the PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC). From these correlations we extract several structural characteristics of jets; the root-mean-squared (RMS) transverse momentum of fragmenting hadrons with respect to the jet sqrt(< j_T^2 >), the mean sine-squared angle between the scattered partons < sin^2(phi_jj) >, and the number of particles produced within the dijet that are associated with a high-p_T particle (dN/dx_E distributions). We observe that the fragmentation characteristics of jets in d+Au collisions are very similar to those in p+p collisions and that there is also little dependence on the centrality of the d+Au collision. This is consistent with the nuclear medium having little influence on the fragmentation process. Furthermore, there is no statistically significant increase in the value of < sin^2(phi_jj) > from p+p to d+Au collisions. This constrains the amount of multiple scattering that partons undergo in the cold nuclear medium before and after a hard-collision.
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http://hal.in2p3.fr/in2p3-00025236
Contributor : Jeanine Pellet <>
Submitted on : Friday, December 16, 2005 - 5:06:38 PM
Last modification on : Wednesday, September 16, 2020 - 4:08:18 PM

### Citation

S.S. Adler, S. Afanasiev, C. Aidala, N.N. Ajitanand, Y. Akiba, et al.. Jet Structure from Dihadron Correlations in d+Au collisions at $\sqrt{S-{NN}}$=200 GeV. Physical Review C, American Physical Society, 2006, 73, pp.054903. ⟨10.1103/PhysRevC.73.054903⟩. ⟨in2p3-00025236⟩

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