Renormalization of the NN interaction with multiple subtractions and power counting: The 3P0 channel
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Artigo de evento
Date
2011
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Proceedings of Science
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0
Authors
Szpigel S.
Timoteo V.S.
Timoteo V.S.
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Abstract
© Copyright owned by the author(s).We investigate the nucleon-nucleon scattering in the 3P0 partial-wave channel within the multiple subtractions renormalization approach known as subtracted kernel method (SKM). We consider the chiral expansion up to next-to-next-to-leading-order (NNLO) using two different power counting schemes and present a systematic analysis of the predicted phase-shifts and the corresponding relative errors for several values of the renormalization scale. The results for the modified power counting scheme, in which some higher-order contact interactions are promoted to lower-order, exhibit a considerable improvement over Weinberg’s power counting scheme, which is based on naive dimensional analysis.
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Keywords
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Contact interaction , Dimensional analysis , Multiple subtraction , Next to next to leading orders , Nucleon-nucleon , Relative errors , Renormalization , Systematic analysis