Numerical Methods in the LO Evolution of Nondiagonal Parton Distributions: The DGLAP Case
نویسندگان
چکیده
In this paper, we discuss the algorithms used in the LO evolution program for nondiagonal parton distributions in the DGLAP region and discuss the stability of the code. Furthermore, we demonstrate that we can reproduce the case of the LO diagonal evolution within less than 0.5% of the original code as developed by the CTEQ-collaboration.
منابع مشابه
Methods in the LO Evolution of Nondiagonal Parton Distributions: The DGLAP Case
In this paper, we discuss the algorithms used in the LO evolution program for nondiagonal parton distributions in the DGLAP region and discuss the stability of the code. Furthermore, we demonstrate that we can reproduce the case of the LO diagonal evolution within 1% of the original code as developed by the CTEQ-collaboration. PACS: 12.38.Bx, 13.85.Fb, 13.85.Ni
متن کاملar X iv : h ep - p h / 97 03 44 9 v 1 2 8 M ar 1 99 7 Nondiagonal Parton Distribution in the Leading Logarithmic Approximation
In this paper we make predictions for nondiagonal parton distributions in a proton in the LLA. We calculate the DGLAP-type evolution kernels in the LLA, solve the nondiagonal GLAP evolution equations with a modified version of the CTEQ-package and comment on the range of applicability of the LLA in the asymmetric regime. We show that the nondiagonal gluon distribution x 2 G(x 1 , x 2 , Q 2) can...
متن کاملMarkovian Monte Carlo program EvolFMC v.2 for solving QCD evolution equations
We present the program EvolFMC v.2 that solves the evolution equations in QCD for the parton momentum distributions by means of the Monte Carlo technique based on the Markovian process. The program solves the DGLAP-type evolution as well as modified-DGLAP ones. In both cases the evolution can be performed in the LO or NLO approximation. The quarks are treated as massless. The overall technical ...
متن کاملحل معادله تحولی DGLAP برای فرایند ترکش گلوئون در LO و NLO
In this work, we calculate DGLAP evolution equation at LO and NLO by Laplace method for fragmentation function of gluon to meson or baryon. To prove the validity of this method, we evolve the fragmentation functions of andby using this method. In this method, it is not necessary to calculate these functions in Laplace space. This method is just used for simplifing the equations
متن کاملUltra - High Energy Neutrino - Nucleon Scattering and Parton Distributions at Small x
The cross section for ultra-high energy neutrino-nucleon scattering is very sensitive to the parton distributions at very small values of Bjorken x (x ≤ 10−4). We numerically investigate the effects of modifying the behavior of the gluon distribution function at very small x in the DGLAP evolution equation. We then use the Color Glass Condensate formalism to calculate the neutrino-nucleon cross...
متن کامل