2,308 research outputs found
Multi-Parton Amplitudes in Gauge Theories
In this report we review recent developments in perturbation theory methods
for gauge theories. We present techniques and results that are useful in the
calculation of cross sections for processes with many final state partons which
have applications in the study of multi-jet phenomena in high-energy Colliders.Comment: 84 pages, 12 figures: Latex, preprint version of 1991 Physics Reports
article. Scanned Figure
JIMWLK evolution for multi-particle production with rapidity correlations
We study multi-particle production with rapidity correlations in
proton-nucleus collisions at high energy in the Color Glass Condensate
framework. The high-energy evolution responsible for such correlations is
governed by a generalization of the JIMWLK equation describing the simultaneous
evolution of the strong nuclear color fields in the direct amplitude and the
complex conjugate amplitude. This functional equation can be used to derive
ordinary evolution equations for the cross-sections for particle production,
but the ensuing equations appear to be too complicated to be useful in
practice, including in the limit of a large number of colors Nc. We propose an
alternative formulation based on a Langevin process, which is valid for generic
Nc and is better suited for numerical implementations. For illustration, we
present the stochastic equations which govern two gluon production with
arbitrary rapidity separation.Comment: 8 pages, 6 figures, based on talk given at IS 2013, 8 - 14 Sep 2013,
Illa da Toxa, Spai
The SM and NLO multileg working group: Summary report
This report summarizes the activities of the SM and NLO Multileg Working
Group of the Workshop "Physics at TeV Colliders", Les Houches, France 8-26
June, 2009.Comment: 169 pages, Report of the SM and NLO Multileg Working Group for the
Workshop "Physics at TeV Colliders", Les Houches, France 8-26 June, 200
QCD
We discuss issues of QCD at the LHC including parton distributions, Monte
Carlo event generators, the available next-to-leading order calculations,
resummation, photon production, small x physics, double parton scattering, and
backgrounds to Higgs production.Comment: 115 pages, Latex, 47 figures, to appear in the Report of the ``1999
CERN Workshop on SM Physics (and more) at the LHC'', S. Catani, M. Dittmar,
D. Soper, W.J. Stirling, S. Tapprogge (convenors
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