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SUMMARY:Automatic computation of NLO corrections for multiparticle product
 ion at the LHC
DTSTART;VALUE=DATE-TIME:20101122T110000Z
DTEND;VALUE=DATE-TIME:20101122T120000Z
DTSTAMP;VALUE=DATE-TIME:20260703T041735Z
UID:indico-event-1777@indico.ific.uv.es
DESCRIPTION:Techniques based on Unitarity cuts have produced a lot of prog
 resses in the computation of 1-loop amplitudes. However\, when working in 
 no more than 4 integer dimensions\, only a part of each of these amplitude
 s can be obtained by means of cuts\, thus partially reducing\, at least fr
 om the conceptual point of view\, the complexity of a 1-loop calculation t
 o the easier problem of evaluating tree-level amplitudes. Another part ins
 tead\, needs a fully dedicated 1-loop computation. I will discuss on the e
 ffective Feynman Rules we have developed to allow for the computation of t
 his last part of Standard Model amplitudes\, in the framework of the OPP t
 echnique. I will also discuss how these methods have been recently merged 
 in the Helac Monte Carlo event generator\, allowing for the evaluation at 
 NLO in the strong coupling costant\, of elementary scattering processes of
  crucial interest at LHC. The present limits of the Helac-NLO system will 
 be also pointed out\, and the work to be done to further extend this code\
 , even in the Electroweak sector\, will be briefly sketched.\n\nhttps://in
 dico.ific.uv.es/event/1777/
LOCATION:Edf. Institutos de Investigación Sala Seminarios IFIC
URL:https://indico.ific.uv.es/event/1777/
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