Physical Review D 77,9 (2008) 092001;
We present the first measurement of two-particle momentum correlations in jets produced in p (p) over bar collisions at root s = 1.96 TeV. Results are obtained for charged particles within a restricted cone with an opening angle of 0.5 radians around the jet axis and for events with dijet masses between 66 and 563 GeV/c(2). A comparison of the experimental data to theoretical predictions obtained for partons within the framework of resummed perturbative QCD in the next-to-leading log approximation shows that the parton momentum correlations survive the hadronization stage of jet fragmentation, giving further support to the hypothesis of local parton-hadron duality. The extracted value of the next-to-leading-log-approximation parton shower cutoff scale Q(eff) set equal to Lambda(QCD) is found to be (1.4(-0.7)(+0.9)) x 100 MeV.
Astronomy & Astrophysics;; Physics, Particles & Fields
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