HEP/Astro Seminar, Wednesday 1st April 1998

Regularization Methods for Nucleon-Nucleon Effective Field Theory

Jim Steele (Ohio State)

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Abstract

There are many controversies over the nonperturbative use of effective
field theory (EFT) methods to describe nonrelativistic nucleon-nucleon
scattering.  I will discuss the characteristics of a meaningful EFT
analysis and compare them with traditional phenomenological approaches
to nucleon-nucleon scattering.  A clear graphical determination of the
radius of convergence for the EFT momentum expansion is obtained and
used to compare different regularization schemes within a simple model
for illustration.  The naturalness of the parameters and predictions
for other observables such as bound-state energies are discussed.

Wednesday, 3:30pm, Smith Lab 4079