Journal or Book Title
PHYSICAL REVIEW LETTERS
A new calculation of the isospin and hypercharge axial-vector current propagators [ ΔA33μν(q2) and ΔA88μν(q2)] to two loops in SU(3)×SU(3) chiral perturbation theory is used to derive chiral spectral function sum rules valid to second order in the light quark masses. Explicit forms are given for the three-pion isospin axial-vector spectral functions at low energy, and application of the sum rules to the determination of counterterms of the chiral Lagrangian is discussed.
Golowich, E and Kambor, J, "Chiral sum rules to second order in quark mass" (1997). PHYSICAL REVIEW LETTERS. 478.
Retrieved from https://scholarworks.umass.edu/physics_faculty_pubs/478