Scattering From Effective Field Theory
نویسنده
چکیده
We examine the role of the ∆∆ intermediate state in NN scattering in the S0 channel. The computation is performed at lowest order in an effective field theory involving local four-fermion operators and one pion exchange using dimensional regularization with MS. As first discussed by Weinberg, in the theory with only nucleons the large scattering length in this channel requires a small scale for the local N operators. When ∆’s are included (but without pions) a large scattering length can be obtained from operators with a scale
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تاریخ انتشار 1996