72 research outputs found
NNLO W Pair Production at the LHC: Status Report
We discuss the result with full mass dependence for the virtual NNLO QCD
corrections to the W boson pair production in the quark-anti-quark annihilation
channel. We also report on our progress regarding the treatment of the
double-real radiative corrections which, along with the virtual-real
corrections, are the other two necessary ingredients for a theoretical
prediction of the total cross section for W+ W- production to NNLO accuracy.Comment: 7 pages, to appear in the proceedings of The European Physical
Society Conference on High Energy Physics (EPS-HEP 2013), Stockholm, Sweden,
18-24 July, 201
Open Spin Chains and Complexity in the High Energy Limit
In the high energy limit of scattering amplitudes in Quantum Chromodynamics
and supersymmetric theories the dominant Feynman diagrams are characterized by
a hidden integrability. A well-known example is that of Odderon exchange, which
can be described as a bound state of three reggeized gluons and corresponds to
a closed spin chain with periodic boundary conditions. In the
supersymmetric Yang-Mills theory a similar spin chain arises in the multi-Regge
asymptotics of the eight-point amplitude in the planar limit. We investigate
the associated open spin chain in transverse momentum and rapidity variables
solving the corresponding effective Feynman diagrams. We introduce the concept
of complexity in the high energy effective field theory and study its emerging
scaling laws.Comment: 24 pages, 13 figures; references adde
NLO corrections to the gluon induced forward jet vertex from the high energy effective action
We determine both real and virtual next-to-leading order corrections to the
gluon induced forward jet vertex, from the high energy effective action
proposed by Lipatov. For these calculations we employ the same regularization
and subtraction formalism developed in our previous work on the quark-initiated
vertex. We find agreement with previous results in the literature.Comment: 16 page
Heavy quark impact factor at NLO
AbstractWe present the calculation of the finite part of the heavy quark impact factor at next-to-leading logarithmic (NLx) accuracy. The final result is written in a form suitable for phenomenological studies such as the calculation of the cross-section for single heavy quark production at the LHC within the kT-factorization scheme
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