https://doi.org/10.1140/epjc/s10052-009-1012-4
Regular Article - Experimental Physics
Systematic study of the jet fragmentation function for inclusive jet-production in p+p collisions at
GeV in STAR
Physics Department, WNSL, Yale University, 272 Whitney Ave, New Haven, CT, 06520, USA
* e-mail: mark.heinz@yale.edu
Received:
1
September
2008
Revised:
4
February
2009
Published online:
8
April
2009
Jet fragmentation functions measured in e
+
e
− and
experiments are well-described on an inclusive hadron level by QCD-based calculations. Fragmentation is expected to be modified by the presence of a strongly interacting medium, but full theoretical description of this modification must still be developed. It has recently been suggested that particle-identified fragmentation functions may provide additional insight into the processes underlying jet quenching. To assess the applicability of QCD-based fragmentation calculations to RHIC data, and to provide a baseline with which to compare fragmentation function measurements in heavy ion collisions, we present the first measurements of charged hadron and particle-identified fragmentation functions of jets reconstructed via a midpoint-cone algorithm from p+p collisions at 200 GeV in STAR. We study the dependence on jet cone-size and jet-energy, and compare the results to PYTHIA simulations based on the Modified Leading Log Approximation (MLLA).
© Springer-Verlag , 2009
