2,625 research outputs found
Higgs Production at LHC
We review Higgs production at hadron colliders via vector-boson fusion and
via gluon fusion, fully inclusively and in association with one and two jets.
Then we address the issue of the measurement of the coupling of the Higgs to
the vector bosons at LHC.Comment: 6 pages, 7 Postscript figures, uses wqcd03.cls Talk at the
International Workshop on QCD: QCD@Work 2003 - Conversano (Italy) 14-18 June
2003 (eConf C030614
Parton-Parton Elastic Scattering and Rapidity Gaps at SSC and LHC Energies
The theory of the perturbative pomeron, due to Lipatov and collaborators, is
used to compute the probability of observing parton-parton elastic scattering
and rapidity gaps between jets in hadron collisions at SSC and LHC energies.Comment: 7 page
QCD Amplitudes in the High-Energy Limit
Dijet production with a rapidity gap between the jets is considered as a test
ground for the production of a heavy Higgs boson via weak-boson fusion at
hadron supercolliders. It is argued that in order to perform a detailed
analysis of dijet production with a rapidity gap we need an {\cal O}(\al_s^4)
calculation including the relevant collinear enhancements which give structure
to the jets. Such a calculation needs not be exact, but must include the full
leading power in of the rate of dijet production in the
high-energy limit. The QCD amplitudes must be determined to the corresponding
accuracy. Accordingly, the scattering amplitudes necessary to compute the full
leading power in of dijet production to {\cal O}(\al_s^3)
are analysed.Comment: LaTeX, 18 pages. To appear in the Proceedings of LISHEP98, Rio,
Brasil, February 199
Theory of Double Hard Diffraction
In this review talk I consider the physics of rapidity gaps between two jets
at hadron colliders, as a preliminary investigation toward understanding the
production of a Higgs boson via weak boson fusion at the LHC.Comment: LaTeX, 11 pages (including 2 figures). To appear in the Proceedings
of the XI Topical Workshop on P-Pbar Collider Physics, Abano Terme, Italy,
May 199
Next-to-Leading Corrections to the BFKL Equation
Using the helicity formalism in the high-energy limit, we compute the
amplitudes which generate the real next-to-leading-logarithmic corrections to
the BFKL equation. Accordingly, we provide a list of all the off-shell vertices
necessary to build such amplitudes.Comment: LaTeX, 16 pages (including 4 figures). To appear in the Proceedings
of Les Rencontres de Physique de la Vallee d'Aoste, La Thuile, Val d'Aosta,
Italy, March 199
Large Rapidity Gaps between Jets at HERA and at the Tevatron
In this talk I consider the formation of a rapidity gap in hadron production
between two jets.Comment: LaTeX, 5 pages. To appear in the Proceedings of the International
Workshop on Deep Inelastic Scattering and Related Phenomena, Roma, Italy,
April 199
QCD challenges at the LHC
In this talk I review some challenges which await perturbative QCD at the
Large Hadron Collider. In particular, I consider the underlying event, Monte
Carlo methods and next-to-leading order (NLO) calculations.Comment: 4 pages. To appear in the proceedings of 41st Rencontres de Moriond:
QCD and Hadronic Interactions, La Thuile, Italy, 18-25 Mar 200
BFKL in forward jet production
In this talk I consider dijet production at large rapidity intervals in
hadron collisions and forward-jet production in DIS as candidate signatures of
a BFKL evolution. The state of the art on the measurements, and on the
BFKL-motivated phenomenological analyses with emphasis on the different
approximations involved, is reviewed.Comment: LaTeX, 16 pages To appear in the Proceedings of the XIIth Hadron
Collider Physics Workshop, Stony Brook, NY, June 199
QCD at hadron colliders
QCD is an extensively developed and tested gauge theory, which models the
strong interactions in the high-energy regime. In this talk, I shall review the
considerable progress which has been achieved in the last few years in the most
actively studied QCD topics: Monte Carlo models, higher-order corrections, and
parton distribution functions. Thanks to that, QCD in the high-energy regime is
becoming more and more an essential precision toolkit to analyse Higgs and New
Physics scenarios at the LHC.Comment: 12 pages, 1 figure. To appear in the proceedings of WHEPP9,
Bhubaneswar, India, January 200
Quark-antiquark contribution to the multigluon amplitudes in the helicity formalism
Using the helicity formalism, we compute the contribution of a
quark-antiquark pair to the tree-level multigluon amplitudes in the high-energy
limit. The -pair production is absent in the leading-log
formalism, but contributes to the next-to-leading corrections to it, and is
therefore relevant for the computation of parton-parton scattering in the
high-energy limit and of the gluon anomalous dimension at small , at
next-to-leading accuracy.Comment: LaTeX, 24 pages (including 5 compressed uuencoded figures
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