Double chiral logs in the $ππ$ scattering amplitude

Details Double chiral logs in the $ππ$ scattering amplitude Double chiral logs in the $ππ$ scattering amplitude

1995-02-13

arxiv.org/abs/hep-ph/9502285v2

Phys.Lett. B350 (1995) 85-91; Erratum-ibid. B361 (1995) 234

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, plain latex, no figures. One algebraic error in the expansion of $F_pi$ corrected. Consequent numerical changes are

Scientific paper

10.1016/0370-2693(95)01162-J

By using the Renormalization Group Equations in Chiral Perturbation Theory,
one can calculate the double chiral logs that appear at two loops in any matrix
element. We calculate them in the $\pi \pi$ scattering amplitude, where they
represent the potentially largest two loop contribution. It is shown that their
correction is reasonably small.

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