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

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

2005-10-06

arxiv.org/abs/nucl-ex/0510021v1

Phys.Rev.C73:054903,2006

Physics

Nuclear Physics

Nuclear Experiment

330 authors, 30 pages text, RevTeX4, 42 figures, 20 tables. Submitted to Physical Review C. Plain text data tables for the poi

Scientific paper

10.1103/PhysRevC.73.054903

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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