Zobrazeno 1 - 10
of 55
pro vyhledávání: '"Kunszt, Zoltan"'
We discuss the limitations of the covariant derivative expansion prescription advocated to compute the one-loop Standard Model (SM) effective lagrangian when the heavy fields couple linearly to the SM. In particular, one-loop contributions resulting
Externí odkaz:
http://arxiv.org/abs/1602.00126
The success of the experimental program at the Tevatron re-inforced the idea that precision physics at hadron colliders is desirable and, indeed, possible. The Tevatron data strongly suggests that one-loop computations in QCD describe hard scattering
Externí odkaz:
http://arxiv.org/abs/1105.4319
Publikováno v:
Nucl.Phys.B840:214-270,2010
With the advent of generalized unitarity and parametric integration techniques, the construction of a generic Next-to-Leading Order Monte Carlo becomes feasible. Such a generator will entail the treatment of QCD color in the amplitudes. We extend the
Externí odkaz:
http://arxiv.org/abs/0911.1962
Publikováno v:
JHEP 0910:068,2009
We compute fully differential next-to-leading order QCD cross-sections for Higgs boson production via gluon fusion in the Standard Model. We maintain the full dependence of the cross-sections on the top and bottom quark mass. We find that finite quar
Externí odkaz:
http://arxiv.org/abs/0907.2362
Publikováno v:
JHEP 0901:012,2009
We employ the recently developed method of generalized $D$-dimensional unitarity to compute one-loop virtual corrections to all scattering amplitudes relevant for the production of a $W$ boson in association with three jets in hadronic collisions, tr
Externí odkaz:
http://arxiv.org/abs/0810.2762
Publikováno v:
PoSRADCOR2007:020,2007
The unitarity method for calculating one-loop amplitudes provides algorithms of polynomial complexity. This is primarily beneficial for the computation of multi-leg one loop amplitudes and it is therefore of great interest to develop a numerical impl
Externí odkaz:
http://arxiv.org/abs/0802.4227
Publikováno v:
JHEP 0804:049,2008
We establish an efficient polynomial-complexity algorithm for one-loop calculations, based on generalized $D$-dimensional unitarity. It allows automated computations of both cut-constructible {\it and} rational parts of one-loop scattering amplitudes
Externí odkaz:
http://arxiv.org/abs/0801.2237
Publikováno v:
JHEP 0703:111,2007
We present an alternative reduction to master integrals for one-loop amplitudes using a unitarity cut method in arbitrary dimensions. We carry out the reduction in two steps. The first step is a pure four-dimensional cut-integration of tree amplitude
Externí odkaz:
http://arxiv.org/abs/hep-ph/0612277
Publikováno v:
JHEP 0701:082,2007
We compute all two-loop master integrals which are required for the evaluation of next-to-leading order QCD corrections in Higgs boson production via gluon fusion. Many two-loop amplitudes for 2 -> 1 processes in the Standard Model and beyond can be
Externí odkaz:
http://arxiv.org/abs/hep-ph/0611236
Publikováno v:
Phys.Lett.B645:213-216,2007
We develop a unitarity method to compute one-loop amplitudes with massless propagators in d=4-2*epsilon dimensions. We compute double cuts of the loop amplitudes via a decomposition into a four-dimensional and a -2*epsilon-dimensional integration. Th
Externí odkaz:
http://arxiv.org/abs/hep-ph/0609191