10,271 research outputs found
The Mueller-Tang jet impact factor at NLO from the high energy effective action
We report on recent progress in the evaluation of next-to-leading order
observables using Lipatov's QCD high energy effective action. In this
contribution we focus on the determination of the real part of the
next-to-leading order corrections to the Mueller-Tang impact factor which is
the only missing element for a complete NLO BFKL description of quark induced
dijet events with a rapidity gap.Comment: 5 pages, Proceedings of 7th International Workshop on Diffraction in
High Energy Physics (Diffraction 2012
Transverse momentum dependent splitting functions at work: quark-to-gluon splitting
Using the recently obtained Pgq splitting function we extend the low x
evolution equation for gluons to account for contributions originating from
quark-to-gluon splitting. In order to write down a consistent equation we resum
virtual corrections coming from the gluon channel and demonstrate that this
implies a suitable regularization of the Pgq singularity, corresponding to a
soft emitted quark. We also note that the obtained equation is in a
straightforward manner generalized to a nonlinear evolution equation which
takes into account effects due to the presence of high gluon densities.Comment: 13 pages, 3 figures, published versio
Applications of Lipatov's high energy effective action to NLO BFKL jet phenomenology
We report on recent progress in the evaluation of next-to-leading order (NLO)
observables using Lipatov's QCD high energy effective action. We calculate both
real and virtual corrections to the quark induced forward jet vertex at NLO,
making use of a new regularization method and a subtraction mechanism. As a new
result we determine the real part of the NLO Mueller-Tang impact factor which
is the only missing element for a complete NLO BFKL description of dijet events
with a rapidity gap.Comment: 4 pages, 29 figures, proceedings of the XX Workshop on Deep-Inelastic
Scattering and Related Subjects, 26-30 March, University of Bonn (2012
Resummation of Large Logarithms in the Rapidity Evolution of Color Dipoles
Perturbative corrections beyond leading-log accuracy to BFKL and BK
equations, describing the rapidity evolution of QCD scattering amplitudes at
high energy, exhibit strong convergence problems due to radiative corrections
enhanced by large single and double transverse logs. We identify explicitly the
physical origin of double transverse logs and resum them directly in coordinate
space as appropriate for BK equation, in terms of an improved local-in-rapidity
evolution kernel. Numerical results show the crucial role of double-logarithmic
resummation for BK evolution, which is stabilized and slowed down by roughly a
factor of two.Comment: 6 pages, 4 figures; Proceedings of the XXIII International Workshop
on Deep-Inelastic Scattering (27 April-May 1 2015, Dallas (USA)
MODELING U.S. BROILER SUPPLY RESPONSE: A STRUCTURAL TIME SERIES APPROACH
A structural time series model is used to estimate the supply response function for broiler production in the United States using quarterly data and a structural time series model. This model has the advantage of expressing trend and seasonal elements as stochastic components, allowing a dynamic interpretation of the results and improving the forecast capabilities of the model. The results of the estimation indicate the continued importance of feed cost to poultry production and of technology as expressed by the stochastic trend variable. However, seasonal influences appear to have become less important, since the seasonal component was not statistically significant.Livestock Production/Industries,
NACCS 37th Annual Conference
Chicana/o Environmental Justics Struggles for a Post-Neoliberal AgeApril 7-10, 2010Grand Hyatthttps://scholarworks.sjsu.edu/naccs_programs/1027/thumbnail.jp
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