Year: 2005
Type: article
Abstract: We study the correlation characteristics between particles in jets produced in heavy-ion collisions. In the framework of parton recombination we calculate the $\ensuremath{\eta}$ and $\ensuremath{\phi}$ distributions of a pion associated with a trigger particle. The origin of the pedestal in $\ensuremath{\Delta}\ensuremath{\eta}$ is related to the longitudinal expansion of the thermal partons that are enhanced by the energy loss of hard partons traversing the bulk medium. The peaks in $\ensuremath{\Delta}\ensuremath{\eta}$ and $\ensuremath{\Delta}\ensuremath{\phi}$ are related to the same angular spread of the shower partons in a jet cone. No artificial short- or long-range correlations are put in by hand. A large part of the correlation between hadrons in jets is due to the correlation among the shower partons arising from momentum conservation. Recombination between thermal and shower partons dominates the correlation characterisitics in the intermediate-${p}_{T}$ region.
Source: Physical Review C
Authors: Charles B. Chiu, Rudolph C. Hwa
Institutions: The University of Texas at Austin, University of Oregon
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W1969030919