RADIATIVE NEUTRON-PROTON CAPTURE IN EFFECTIVE CHIRAL LAGRANGIANS

被引:89
作者
PARK, TS
MIN, DP
RHO, M
机构
[1] SEOUL NATL UNIV,CTR THEORET PHYS,SEOUL 151742,SOUTH KOREA
[2] CEA SACLAY,SERV PHYS THEOR,F-91191 GIF SUR YVETTE,FRANCE
关键词
D O I
10.1103/PhysRevLett.74.4153
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We calculate the cross section for the thermal n+pd+ process in chiral perturbation theory to next-to-next-to-leading order using heavy-fermion formalism. The exchange current correction is found to be (4.50.3)% in amplitude, and the chiral perturbation at one-loop order gives the cross section th=3342 mb, which is in agreement with the experimental value 334.20.5 mb. Together with the axial-charge transitions, this provides a strong support for the power of chiral Lagrangians for nuclear physics. © 1995 The American Physical Society.
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页码:4153 / 4156
页数:4
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