U(3) chiral perturbation theory with infrared regularization

Details U(3) chiral perturbation theory with infrared regularization U(3) chiral perturbation theory with infrared regularization

2001-05-15

arxiv.org/abs/hep-ph/0105132v1

Phys.Rev. D63 (2001) 074019

Physics

High Energy Physics

High Energy Physics - Phenomenology

29 pages

Scientific paper

10.1103/PhysRevD.63.074019

We include the eta-prime in chiral perturbation theory without employing 1/N_c counting rules. The method is illustrated by calculating the masses and decay constants of the Goldstone boson octet (pions, kaons, eta) and the singlet eta-prime up to one-loop order. The effective Lagrangian describing the interactions of the eta-prime with the Goldstone boson octet is presented up to fourth chiral order and the loop integrals are evaluated using infrared regularization, which preserves Lorentz and chiral symmetry.

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