Physical Nucleon Form Factors from Lattice QCD.

Matevosyan, H. ; Thomas, A. W. ; Miller, G. A.

Technical Information Center Oak Ridge Tennessee

关键词: Nucleons;    Quantum chromodynamics;    Form factors;    Analytical functions;    Bag model;   

RP-ID  :  DE2006862419

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

We explore the possibility of extrapolating state of the art lattice QCD calculations of nucleon form factors to the physical regime. We find that the lattice results can be reproduced using the Light Front Cloudy Bag Model and the Extended Gari-Krmpelmann Model by letting their paramters be analytical functions of the quark mass. We then use the models to extend the lattice calculations to large values of Q(sup 2) of interest to current and planned experiments. These functions for the first model are also used to define extrapolations to the physical value of the pion mass, thereby allowing us to study how the predicted zero in G(sub E)Q(sup 2)/G(sub M)Q(sup 2) varies as a function of quark mass.