Jet structure from dihadron correlations in d+Au collisions at s(NN)**(1/2) = 200-GeV - INSPIRE

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Jet structure from dihadron correlations in d+Au collisions at s(NN)**(1/2) = 200-GeV

PHENIX

Collaboration

Oct, 2005

30 pages

Published in:

Phys.Rev.C 73 (2006) 054903

e-Print:

nucl-ex/0510021 [nucl-ex]

DOI:

10.1103/PhysRevC.73.054903

Experiments:

BNL-RHIC-PHENIX

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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.

Note:

330 authors, 30 pages text, RevTeX4, 42 figures, 20 tables. Submitted to Physical Review C. Plain text data tables for the points plotted in figures for this and previous PHENIX publications are (or will be) publicly available at http://www.phenix.bnl.gov/papers.html

24.85.+p
13.87.-a
25.75.-q
nucleus nucleus: colliding beams
scattering: heavy ion
deuteron
gold
p p: interaction
hadron: multiple production
correlation: two-particle

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Figures(48)

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