Triply Differential Jet Cross Sections for Hadron Collisions at Order alphas3 in QCD
Stephen D. Ellis, Davison E. Soper
Abstract
We discuss cross sections for hadron + hadron to 2 jets + anything in which three jet variables are measured. Such cross sections are useful especially for determining parton distributions. We define a new cross section d sigma/dXA dXB d eta* for which the perturbation theory is nicely behaved even in the kinematic regime where the parton distributions are probed at large momentum fractions. The cross section dσ/dET1\, dη1\, dη2, which has been used in the past, is not so well behaved in this region. We calculate these cross sections at order αs3 in QCD.
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