3,231 research outputs found
Next-to-leading order QCD corrections to Higgs production at a future lepton-proton collider
Crucial information on the coupling of the Higgs boson to bottom quarks is
expected from Higgs production in association with a forward tagging jet at a
future high-energy lepton-proton collider. In order to control the theoretical
uncertainties of the signal process, the impact of radiative corrections has to
be quantified. We present the full next-to-leading order QCD corrections to e-
p -> e- j H and e- p -> nu_e j H in the form of a flexible Monte-Carlo program
allowing for the calculation of cross sections and kinematic distributions
within experimentally feasible selection cuts. QCD corrections are found to be
very small for cross sections, while the shape distortion of distributions can
be as large as 20%. Residual scale uncertainties at next-to-leading order are
at the permille level.Comment: 15 pages, 14 figure
Hard exclusive photoproduction of and mesons
We present predictions for differential cross sections for the reaction
and give an outlook to which extent our calculations may
be generalized to the photoproduction of mesons. Our results are
obtained within perturbative QCD treating the proton as a quark-diquark system.Comment: 4 pages, 1 figure, uses Elsevier style espcrc1.st
Longitudinally Polarized Photoproduction of Inclusive Hadrons at Fixed-Target Experiments
We present a detailed phenomenological study of spin-dependent
single-inclusive high-p_T hadron photoproduction with particular emphasis on
the kinematics relevant for the Compass and Hermes fixed-target experiments. We
carefully examine the theoretical uncertainties associated with the only
moderate transverse momenta accessible in such measurements and analyze the
sensitivity of the relevant spin asymmetries to the gluon polarization in the
nucleon as well as to the completely unknown parton content of circularly
polarized photons.Comment: 12 pages, 14 figures; final version to appear in EPJC; comparison to
E155 data and references adde
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