Volume 94, Number 4, May 2011
|Number of page(s)||5|
|Section||The Physics of Elementary Particles and Fields|
|Published online||05 May 2011|
Effective range expansion in various scenarios of EFT(/π)
Department of Physics, East China Normal University - Shanghai 200241, China
2 Kavli Institute for Theoretical Physics China, Chinese Academy of Sciences - Beijing 100190, China
Accepted: 7 April 2011
Using rigorous solutions, we compare the ERE parameters obtained in three different scenarios of EFT() in nonperturbative regime. A scenario with unconventional power counting (like KSW) is shown to be disfavored by the PSA data, while the one with elaborate prescription of renormalization but keeping conventional power counting intact seems more promising.
PACS: 13.75.Cs – Nucleon-nucleon interactions (including antinucleons, deuterons, etc.) / 11.10.Gh – Renormalization / 11.55.-m – S-matrix theory; analytic structure of amplitudes
© EPLA, 2011
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