FYI -------------------------------------------- Flemming Videbaek Physics Department Bldg 510-D Brookhaven National Laboratory Upton, NY11973 phone: 631-344-4106 cell: 631-681-1596 fax: 631-344-1334 e-mail: videbaek @ bnl.gov ============================================================================================================================================ > > TITLE: Jet Properties from Di-Hadron Correlations in p+p Collisions at \sqrt{s_{NN}} = 200 GeV > > ABSTRACT: > The properties of jets produced in p+p collisions at \sqrt{s_{NN}}=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_T . The extracted value, \sqrt{<j_T^2>} = 585±6(stat)±15(sys) MeV/c, is > constant with respect to the trigger particle transverse momentum, and comparable to the previous lower \sqrt{s} measurements. The > width of the away-side peak is shown to be a convolution of j_T with the fragmentation variable, z, and the partonic transverse > momentum, k_T . The <z> is determined through a combined analysis of the measured pi^0 inclusive and associated spectra using jet > fragmentation functions measured in e+e− collisions. The final extracted values of k_T are then determined to also be independent > of the trigger particle transverse momentum, over the range measured, with value of \sqrt{<k_T^2>} = 2.68 ± 0.07(stat) ± 0.34(sys) > GeV/c. > > _______________________________________________ Brahms-l mailing list Brahms-l@lists.bnl.gov http://lists.bnl.gov/mailman/listinfo/brahms-lReceived on Fri May 5 04:08:22 2006
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