164 research outputs found
The High Energy Radiation Pattern from BFKLex
We discuss a recent study on high-energy jet production in the multi-Regge
limit done with the use of the Monte Carlo event generator BFKLex which
includes collinear improvements in the form of double-log contributions. We
will show results for the average transverse momentum and azimuthal angle of
the final state jets when at least one of them is very forward in rapidity and
another one is very backward. We also discuss the introduction of a new
observable which accounts for the average rapidity ratio among subsequent
emissions.Comment: 6 pages, presented by G. Chachamis at the XXIV International Workshop
on Deep-Inelastic Scattering and Related Subjects, 11-15 April 2016, DESY
Hamburg, German
W Pair Production at the LHC - I. Virtual O(alpha_s^2) Corrections in the High Energy Limit
We present the result for the two-loop and the one-loop squared virtual QCD
corrections to the W boson pair production in the quark-anti-quark-annihilation
channel in the limit where all kinematical invariants are large compared to the
mass of the W boson. The infrared pole structure is in agreement with the
prediction of Catani's general formalism for the singularities of two loop
amplitudes.Comment: 22 pages, 1 figure, references added, typos corrected, final version
as publishe
The NLO N =4 SUSY BFKL Green function in the adjoint representation
We study the solution of the BFKL equation in the adjoint representation for
the N=4 SUSY theory at NLO accuracy. Consistency with the large momentum
transfer solution obtained by Fadin and Lipatov is found. We investigate, for
large and small values of the momentum transfer, the growth with energy of the
Green function, its collinear behaviour and the expansion in azimuthal angle
Fourier components.Comment: 7 pages, 4 figure
Massive particle production to NNLO in QCD
We discuss the recent derivation of the one-loop squared virtual QCD
corrections to the W boson pair production in the quark-anti-quark-annihilation
channel in the limit where all kinematical invariants are large compared to the
mass of the W boson. In particular, we elaborate on the combined use of the
helicity matrix formalism with the Mellin-Barnes representations technique.Comment: Presented at "Loops and Legs in Quantum Field Theory", Sondershausen,
20-25 April 2008, 5 page
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