AN→NN weak interaction in effective-field theory -: art. no. 051601

被引：13
|
作者：
Parreño, A
Bennhold, C
Holstein, BR
机构：
[1] Univ Barcelona, Fac Fis, Dept ECM, E-08028 Barcelona, Spain
[2] George Washington Univ, Ctr Nucl Studies, Dept Phys, Washington, DC 20052 USA
[3] Univ Massachusetts, Dept Phys, LGRT, Amherst, MA 01003 USA
[4] Thomas Jefferson Natl Accelerator Facil, Theory Grp, Newport News, VA 23606 USA
来源：
PHYSICAL REVIEW C | 2004年 / 70卷 / 05期
关键词：
D O I：
10.1103/PhysRevC.70.05.051601
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：
The nonleptonic weak \DeltaS\ = 1 LambdaN interaction, responsible for the dominant nonmesonic decay of all but the lightest hypernuclei, is studied in the framework of an effective-field theory. The long-range physics is described through tree-level exchange of the SU(3) Goldstone bosons, while the short-range potential is parametrized in terms of the lowest-order contact terms. We obtain reasonable fits to available weak hypernuclear decay rates and quote the values for the parity-violating asymmetry as predicted by the present effective-field theory.
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页数：5
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