Removing pions from two-nucleon effective field theory

被引：47

作者：

Steele, JV ^{[1
]}

Furnstahl, RJ ^{[1
]}

机构：

[1] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA

来源：

NUCLEAR PHYSICS A | 1999年 / 645卷 / 03期

基金：

美国国家科学基金会;

关键词：

effective field theory; modified effective range; nucleon-nucleon scattering;

D O I：

10.1016/S0375-9474(98)00619-8

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Two-nucleon effective field theory (EFT) beyond momenta of order the pion mass is studied for both cutoff regularization and dimensional regularization with power divergence subtraction (PDS). Models with two mass scales illustrate how effects of long-distance pion physics must be removed from the coefficients that encode short-distance physics. The modified effective range expansion shows that treating pions perturbatively, as in the PDS power counting, limits the radius of convergence of the EFT. Predictions from both regularization schemes with one-pion contributions are compared to data. The breakdown of the effective field theory occurs for momenta of order 300 MeV, even using the modified effective range expansion. This behavior is shown to be consistent with that expected from two-pion contributions. (C) 1999 Elsevier Science B.V.

引用

页码：439 / 461

页数：23

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