Jet properties from dihadron correlations in p+p collisions at {radical}(s)=200 GeV
- 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, Vol. 74, Issue 7; Other Information: DOI: 10.1103/PhysRevD.74.072002; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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