arXiv:nucl-th/0108042·v2·Nuclear Theory
Matrix Elements of Twist-2 Operators in Quenched Chiral Perturbation Theory
Jiunn-Wei Chen🇺🇸 · Martin J. Savage🇺🇸
Abstract
We compute the leading non-analytic quark mass dependence of the matrix elements of isovector twist-2 operators between octet baryon states in quenched QCD using quenched chiral perturbation theory. There are contributions of the form m_q log m_q, in analogy with QCD, but there are also contributions of the form log m_q from hairpin interactions. The nucleon does not receive such hairpin contributions.
Comments: 16 pages, 5 eps figs., latex