QCD tests at CDF

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We present results for the inclusive jet cross section and the dijet mass distribution. The inclusive cross section and dijet mass both exhibit significant deviations from the predictions of NLO QCD for jets with E{sub T}>200 GeV, or dijet masses > 400 GeV/c{sup 2}. We show that it is possible, within a global QCD analysis that includes the CDF inclusive jet data, to modify the gluon distribution at high x. The resulting increase in the jet cross-section predictions is 25-35%. Owing to the presence of k{sub T} smearing effects, the direct photon data does not provide as strong a constraint ... continued below

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6 p.

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Kovacs, E. February 1, 1996.

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Description

We present results for the inclusive jet cross section and the dijet mass distribution. The inclusive cross section and dijet mass both exhibit significant deviations from the predictions of NLO QCD for jets with E{sub T}>200 GeV, or dijet masses > 400 GeV/c{sup 2}. We show that it is possible, within a global QCD analysis that includes the CDF inclusive jet data, to modify the gluon distribution at high x. The resulting increase in the jet cross-section predictions is 25-35%. Owing to the presence of k{sub T} smearing effects, the direct photon data does not provide as strong a constraint on the gluon distribution as previously thought. A comparison of the CDF and UA2 jet data, which have a common range in x, is plagued by theoretical and experimental uncertainties, and cannot at present confirm the CDF excess or the modified gluon distribution.

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6 p.

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INIS; OSTI as DE97053596

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  • 2. recontres du Viet Nam: physics at the frontiers of the standard model and the sun and beyond, Ho Chi Minh City (Viet Nam), 21-28 Oct 1995

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  • Other: DE97053596
  • Report No.: FNAL/C--96/025-E
  • Report No.: CONF-9510324--
  • Grant Number: AC02-76CH03000
  • Office of Scientific & Technical Information Report Number: 622555
  • Archival Resource Key: ark:/67531/metadc691177

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • February 1, 1996

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  • Aug. 14, 2015, 8:43 a.m.

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  • Nov. 10, 2016, 4:26 p.m.

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Kovacs, E. QCD tests at CDF, article, February 1, 1996; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc691177/: accessed October 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.