Jet structure from dihadron correlations in d+Au collisions at {radical}(s{sub NN})=200 GeV
- 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, Vol. 73, Issue 5; Other Information: DOI: 10.1103/PhysRevC.73.054903; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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