Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-02-25
Physics
High Energy Physics
High Energy Physics - Phenomenology
Invited talk at the "Frontiers of Fundamental Physics" Symposium, B. M. Birla Science Centre, Hyderabad, India, December 30, 1
Scientific paper
Chiral perturbation theory, the low energy effective theory of the strong interactions for the light pseudoscalar degrees of freedom, is based on effective Lagrangian techniques and is an expansion in the powers of the external momenta and the powers of the quark masses, which correct the soft-pion theorems. Our primary emphasis will be on the problem of $\pi\pi$ scattering. After briefly reviewing these features and some results, we review some features of $\pi-N$ scattering.
Ananthanarayan Balasubramanian
Büttiker Paul
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