305 research outputs found
Phenomenology of a SU(2) triplet Higgs.
We study the Renormalization Group (RG) evolution of the couplings in
a model with a real SU(2) triplet in the Higgs sector. Insisting that the
model remain valid up to 1 TeV we show that it is possible for there to
be no light Higgs bosons without any otherwise dramatic deviation from
the physics of the Standard Model
Solution of the BFKL equation at next-to-leading order.
We solve the Balitsky–Fadin–Kuraev–Lipatov (BFKL) equation in the
next–to–leading logarithmic approximation for forward scattering with
all conformal spins using an iterative method
Large-Q_T W-boson production at the Tevatron
The production of W bosons at large transverse momentum at the Tevatron is
dominated by soft-gluon corrections. In this talk we present a calculation of
these corrections at next-to-next-to-leading order. The corrections enhance the
transverse momentum distribution of the W while reducing the scale dependence.Comment: 4 pages, 2 figures, presented at DPF04, Riverside, California, August
26-31, 200
Numerical tools for the theoretical study of QCD at small x
In this contribution we present the status of two numerical tools designed to
study the small x limit of QCD. The first one is a Monte Carlo simulation of
the BFKL evolution equation. In design of this approach emphasis has been
placed on exploiting the linear behaviour that many variants of the BFKL
evolution possess. This allows us to design a procedure which can be used to
study theoretical and phenomenological aspects of different kernels. The second
one is a semi-analytic approach to study Lipatov's effective action which
describes Reggeon interactions. The study of the properties of this action is
very complicated and we propose using a computational tool to handle the large
amount of non--local vertices and the derivation of higher order corrections.Comment: 7 pages, 3 figures. International Workshop on Diffraction in
High-Energy Physics -DIFFRACTION 2006 - September 5-10 2006 Adamantas, Milos
island, Greec
BFKL Effects in Azimuthal Angle Correlations of Forward Jets
The azimuthal angle correlation of Mueller-Navelet jets at hadron colliders
is studied in the NLO BFKL formalism. We highlight the need of collinear
improvements in the kernel to obtain good convergence properties and we obtain
better fits for the Tevatron data than at LO accuracy. We also estimate these
correlations for larger rapidity differences available at the LHC.Comment: Presented at DIS 2007: 15th International Workshop on Deep-Inelastic
Scattering, Munich, Germany, 16-20 Apr 2007, 4 pages, 3 figures, LATE
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
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