838 research outputs found
Higgs boson production at Tevatron Run II and LHC
The main production channels of the Higgs boson at hadron colliders are
briefly reviewed and recent developments in the calculation of QCD effects are
discussed.Comment: Latex, 4 pages. Invited talk given at the XIII italian meeting on
high energy physics ``LEPTRE'', Rome April 18-20 2001, to appear in the
proceeding
Fracture functions: factorization and evolution
Fracture functions and their evolution equations are reviewed. Some
phenomenological applications are briefly discussed.Comment: latex, 4 pages including 2 postscript figures; Talk given at the
DIS98 Workshop, Brussels, 4-8, 199
The transverse-momentum distribution of the Higgs boson at the LHC
We present QCD predictions for the transverse momentum (q_T) distribution of
the Higgs boson at the LHC. At small q_T the logarithmically-enhanced terms are
resummed to all orders up to next-to-next-to-leading logarithmic accuracy. The
resummed component is consistently matched to the next-to-leading order
calculation valid at large q_T. The results, which implement the most advanced
perturbative predictions available at present for this observable, show a good
stability with respect to theoretical uncertainties. The numerical program HqT,
used to perform the calculation, is briefly discussed.Comment: 4 pages, 2 figures, to appear in the Proceedings of the International
Europhysics Conference on High Energy Physics, July 21st - 27th 2005, Lisboa,
Portuga
An NNLO subtraction formalism in hadron collisions and its application to Higgs boson production at the LHC
We consider higher-order QCD corrections to the production of colourless
high-mass systems (lepton pairs, vector bosons, Higgs bosons,...) in hadron
collisions. We propose a new formulation of the subtraction method to
numerically compute arbitrary infrared-safe observables for this class of
processes. To cancel the infrared divergences, we exploit the universal
behaviour of the associated transverse-momentum (q_T) distributions in the
small-q_T region. The method is illustrated in general terms up to the
next-to-next-to-leading order (NNLO) in QCD perturbation theory. As a first
explicit application, we study Higgs boson production through gluon fusion. Our
calculation is implemented in a parton level Monte Carlo program that includes
the decay of the Higgs boson in two photons. We present selected numerical
results at the LHC.Comment: References adde
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