Inclusive jet cross section measurement at D0 Page: 1 of 4
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FERMI LAB-CONF-06-342-E
June 30, 2006 17:9 Proceedings Trim Size: 9in x 6in hfs-voutilainen
INCLUSIVE JET CROSS SECTION MEASUREMENT AT DO
M. VOUTILAINEN FOR THE DO COLLABORATION
UNIVERSITY OF NEBRASKA IN LINCOLN,
HELSINKI INSTITUTE OF PHYSICS
Fermilab DO M.S. 357,
Batavia, IL 60510-0500, USA
E-mail: mavoutil@fnal.gov
We present a new preliminary measurement of the inclusive jet cross section in
pp collisions based on a integrated luminosity of about 0.8fb-1. The data were
acquired using the DO detector between 2002 and 2005. Jets are reconstructed
using an iterative cone algorithm with radius Rcone = 0.7. The inclusive jet cross
section is presented as a function of transverse jet momentum and rapidity. Predic-
tions from perturbative QCD in next-to-leading order, plus threshold corrections
in 2-loop accuracy describe the shape in the transverse jet momentum.
1. Introduction
The production of particle jets in hadron collisions is described by the
theory of Quantum Chromodynamics (QCD). When the transverse jet mo-
mentum with respect to the hadron beam direction (PT) is large, the contri-
butions from long-distance physics processes with low PT are small and the
production rates of jets can be predicted by perturbative QCD (pQCD).
The inclusive jet cross section in pp collisions at large PT is directly sensi-
tive to the strong coupling constant (a,,) and the parton density functions
(PDFs) of the proton. Furthermore, potential deviations from the pQCD
prediction at high PT, not explained by PDFs, may indicate new physics
beyond the Standard Model.
2. Jet energy scale
The inclusive jet cross section is measured in two central rapidity regions
Iyjet I < 0.4 and 0.4 < Iyjet I < 0.8. We note that the data are corrected for
underlying events when the jet energy scale is computed using
Ecal O
Ec RS (1)
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Voutilainen, M. & Phys., /Nebraska U. /Helsinki Inst. of. Inclusive jet cross section measurement at D0, article, September 1, 2006; Batavia, Illinois. (https://digital.library.unt.edu/ark:/67531/metadc882518/m1/1/: accessed April 24, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.