Nucleon matrix elements and baryon masses in the Dirac orbital model |
| |
Authors: | Yu A Simonov and M A Trusov |
| |
Institution: | (1) Institute of Theoretical and Experimental Physics, Moscow, Russia |
| |
Abstract: | Using the expansion of the baryon wave function in a series of products of single-quark bispinors (Dirac orbitals), the nonsinglet
axial and tensor charges of a nucleon are calculated. The leading term yields g
A
= 1.27 in good agreement with experiment. Calculation is essentially parameter-free and depends only on the strong coupling
constant value α
s
. The importance of lower Dirac bispinor component, yielding 18% to the wave-function normalization is stressed. As a check,
the baryon decupletmasses in the formalism of this model are also computed using standard values of the string tension σ and the strangequark mass m
s
; the results being in a good agreement with experiment.
The text was submitted by the authors in English. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|