Subtractive renormalization of the chiral potentials up to next-to-next-to-leading order in higher NN partial waves

Understand

We develop a subtractive renormalization scheme to evaluate the P-wave NN scattering phase shifts using chiral effective theory potentials.

• This allows us to consider arbitrarily high cutoffs in the Lippmann-Schwinger equation (LSE).
• We employ NN potentials computed up to next-to-next-to-leading order (NNLO) in chiral effective theory, using both dimensional regularization and spectral-function regularization.
• Our results obtained from the subtracted P-wave LSE show that renormalization of the NNLO potential can be achieved by using the generalized NN scattering lengths as input--an alternative to fitting the constant that multiplies the P-wave contact interaction in the chiral effective theory NN force.