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Jet Structure from Dihadron Correlations in d+Au collisions at sqrt(s_NN) = 200 GeV

PHENIX Collaboration·S. S. Adler
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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( ), the mean sine-squared angle between the scattered partons , 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 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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PHENIX Collaboration, S. S. Adler. 2005-10-06. Jet Structure from Dihadron Correlations in d+Au collisions at sqrt(s_NN) = 200 GeV. https://doi.org/10.1103/physrevc.73.054903

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