Modified perturbation theory approach for production and decay
نویسندگان
چکیده
منابع مشابه
Analytic Perturbation Theory Model for QCD and Upsilon Decay
An elegant and more precise (Denominator) formula for the 3-loop perturbative QCD coupling is discussed. It improves the common expression (e.g., canonized by PDG) in few GeV region. On its base, we propose simple analytic Model for ghostfree QCD running couplings and their effective powers within the Analytic Perturbation Theory, in both the space-like (Euclidean) and time-like (Minkowskian) r...
متن کاملProposal for a modified Møller-Plesset perturbation theory
Alejandro Cabo, Francisco Claro, Eduardo Menéndez-Proupin,* Norge Cruz-Hernández, and Javier Fernández-Sanz Grupo de Física Teórica, Instituto de Cibernética, Matematica y Física, Calle E, No. 309, Vedado, La Habana, Cuba Facultad de Física, Pontificia Universidad Católica de Chile, Vicuña Mackenna 4860 Santiago, Chile Departamento de Física, Facultad de Ciencias, Universidad de Chile, Las Palm...
متن کاملA Proposal for a Modified Møller-Plesset Perturbation Theory
A modified version of the Møller-Plesset approach for obtaining the correlation energy associated to a Hartree-Fock ground state is proposed. The method is tested in a model of interacting fermions that allows for an exact solution. Using up to third order terms improved results are obtained, even in the limit of loosely bound particles. The study of molecules and larger systems is seriously co...
متن کاملModified homotopy perturbation method for solving non-linear oscillator's equations
In this paper a new form of the homptopy perturbation method is used for solving oscillator differential equation, which yields the Maclaurin series of the exact solution. Nonlinear vibration problems and differential equation oscillations have crucial importance in all areas of science and engineering. These equations equip a significant mathematical model for dynamical systems. The accuracy o...
متن کاملPseudoscalar Decay Constants in Staggered Chiral Perturbation Theory
In a continuation of an ongoing program, we use staggered chiral perturbation theory to calculate the one-loop chiral logarithms and analytic terms in the pseudoscalar meson leptonic decay constants, f π + 5 and f K + 5. We consider the partially quenched, " full QCD " (with three dynamical flavors), and quenched cases.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physics Letters B
سال: 2002
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(02)02549-2