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Phys. Rev. D 77, 092001 (2008) [18 pages]

Two-particle momentum correlations in jets produced in pp̅ collisions at s=1.96  TeV

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T. Aaltonen et al. CDF Collaboration
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Received 22 February 2008; published 16 May 2008

We present the first measurement of two-particle momentum correlations in jets produced in pp̅ collisions at 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/c2. 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 Qeff set equal to ΛQCD is found to be (1.4-0.7+0.9)×100  MeV.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevD.77.092001
DOI:
10.1103/PhysRevD.77.092001
PACS:
13.87.−a, 12.38.Qk