Jet properties from dihadron correlations in p+p collisions at {radical}(s)=200 GeV

Journal Article · Sun Oct 01 04:00:00 EDT 2006 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.74.072002· OSTI ID:20871279

Adler, S S; Aronson, S H; Chujo, T; David, G; Desmond, E J; Franz, A; 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 ^[1]

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

The properties of jets produced in p+p collisions at {radical}(s)=200 GeV 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 j{sub T}. The extracted value, {radical}(<j{sub T}{sup 2}>)=585{+-}6(stat){+-}15(sys) MeV/c, is constant with respect to the trigger particle transverse momentum, and comparable to the previous lower {radical}(s) measurements. The width of the away-side peak is shown to be a convolution of j{sub T} with the fragmentation variable, z, and the partonic transverse momentum, k{sub T}. The <z> is determined through a combined analysis of the measured {pi}{sup 0} inclusive and associated spectra using jet-fragmentation functions measured in e{sup +}e{sup -} collisions. The final extracted values of k{sub T} are then determined to also be independent of the trigger particle transverse momentum, over the range measured, with value of {radical}(<k{sub T}{sup 2}>)=2.68{+-}0.07(stat){+-}0.34(sys) GeV/c.

• OSTI ID: 20871279
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 7 Vol. 74; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CORRELATION FUNCTIONS
CORRELATIONS
ELECTRON-POSITRON INTERACTIONS
GEV RANGE
JET MODEL
LEADING PARTICLES
MEV RANGE
PIONS NEUTRAL
PROTON-PROTON INTERACTIONS
TRANSVERSE MOMENTUM