Jet structure from dihadron correlations in d+Au collisions at {radical}(s{sub NN})=200 GeV

Journal Article · Mon May 15 04:00:00 EDT 2006 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.73.054903· OSTI ID:20771550

Adler, S S; Aronson, S H; Chujo, T; David, G; Desmond, E J; Haggerty, J S; Harvey, M; Johnson, B M; Kistenev, E; Kroon, P J; Makdisi, Y I; Mioduszewski, S; Mitchell, J T; Morrison, D P; O'Brien, E; Pinkenburg, C; Pisani, R P; Purschke, M L; Shea, T K; Sourikova, I V ^[1]

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1. Brookhaven National Laboratory, Upton, New York 11973-5000 (United States)

Dihadron correlations at high transverse momentum p{sub T} in d+Au collisions at {radical}(s{sub NN})=200 GeV at midrapidity are measured by the PHENIX experiment at the Relativistic Heavy Ion Collider. From these correlations, we extract several structural characteristics of jets: the root-mean-squared transverse momentum of fragmenting hadrons with respect to the jet {radical}(<j{sub T}{sup 2}>), the mean sine-squared of the azimuthal angle between the jet axes <sin{sup 2}{phi}{sub jj}>, and the number of particles produced within the dijet that are associated with a high-p{sub T} particle (dN/dx{sub 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 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{sup 2}{phi}{sub jj}> from p+p to d+Au collisions. This constrains the effect of multiple scattering that partons undergo in the cold nuclear medium before and after a hard collision.

• OSTI ID: 20771550
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 5 Vol. 73; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BROOKHAVEN RHIC
CORRELATIONS
DEUTERON REACTIONS
DISTRIBUTION
GEV RANGE
GOLD 197 TARGET
HADRONS
JET MODEL
MULTIPLE SCATTERING
NUCLEAR FRAGMENTATION
NUCLEAR MATTER
PROTON-PROTON INTERACTIONS
TRANSVERSE MOMENTUM