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ID 19503
file
creator
PHENIX Collaboration
Hachiya, Takashi
Kohara, Ryota
Nakamura, Tomoaki
Tsuchimoto, Yuji
abstract
The properties of jets produced in p+p collisions at √s=200GeV are measured using the method of two-particle correlations. The trigger particle is a leading particle from a large transverse momentum jet while the associated particle comes from either the same jet or the away-side jet. Analysis of the angular width of the near-side peak in the correlation function determines the jet-fragmentation transverse momentum jT. The extracted value, √〈jT2〉 =585±6(stat)±15(sys)MeV/c, is constant with respect to the trigger particle transverse momentum, and comparable to the previous lower √s measurements. The width of the away-side peak is shown to be a convolution of jT with the fragmentation variable, z, and the partonic transverse momentum, kT. The 〈z〉 is determined through a combined analysis of the measured π0 inclusive and associated spectra using jet-fragmentation functions measured in e+e- collisions. The final extracted values of kT are then determined to also be independent of the trigger particle transverse momentum, over the range measured, with value of √〈kT2〉 =2.68±0.07(stat)±0.34(sys)GeV/c.
journal title
Physical Review D - Particles, Fields, Gravitation and Cosmology
volume
Volume 74
issue
Issue 7
start page
072002-1
end page
072002-26
date of issued
2006-10-05
publisher
American Physical Society
issn
1550-7998
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
Copyright (c) 2006 The American Physical Society.
relation url
department
Graduate School of Science