Matrix Elements of Twist-2 Operators in Quenched Chiral Perturbation Theory

Details Matrix Elements of Twist-2 Operators in Quenched Chiral Perturbation Theory Matrix Elements of Twist-2 Operators in Quenched Chiral Perturbation Theory

2001-08-16

arxiv.org/abs/nucl-th/0108042v2

Nucl.Phys. A707 (2002) 452-468

Physics

Nuclear Physics

Nuclear Theory

16 pages, 5 eps figs., latex

Scientific paper

10.1016/S0375-9474(02)00994-6

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.

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