CHARGE-SYMMETRY BREAKING IN THE NUCLEON-NUCLEON INTERACTION

被引:20
作者
LANGACKER, P
SPARROW, DA
机构
[1] Department of Physics, University of Pennsylvania, Philadelphia
关键词
D O I
10.1103/PhysRevLett.43.1559
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
New calculations of charge-symmetry breaking in the NN interaction lead to radically altered predictions for the difference between nn and pp scattering lengths. Inclusion of the η′ meson and use of realistic magnetic couplings for the vector meson changes the sign as well as the magnitude of earlier results. This sensitivity arises in part from cancellations within the pseudoscalar and vector contributions separately, making precise calculations difficult. Meson mixing is determined from quark mass differences, and the finite width of the ρ meson is included. © 1979 The American Physical Society.
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页码:1559 / 1562
页数:4
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