NEW EVALUATION OF THE PARITY VIOLATING PION-NUCLEON COUPLING

被引：36

作者：

BUCCELLA, F ^{[1
]}

LUSIGNOLI, M ^{[1
]}

MAIANI, L ^{[1
]}

PUGLIESE, A ^{[1
]}

机构：

[1] NATL INST NUCL PHYS,ROME,ITALY

来源：

NUCLEAR PHYSICS B | 1979年 / 152卷 / 3-4期

关键词：

D O I：

10.1016/0550-3213(79)90092-0

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We evaluate the parity violating pion-nucleon coupling, Aπ, in the framework of the standard model of weak and electromagnetic interactions, including QCD corrections. We point out that important contributions to Aπ have been overlooked previously. Taking into account the uncertainties in the determination of the coefficients of the effective Hamiltonian, we find Aπ = (16-29) (Aπ)C, where (Aπ)C is the prediction of the Cabibbo theory, related to hyperon decay S-wave amplitudes. The sign of Aπ with respect to the strong pion-nucleon coupling is also determined. © 1979.

引用

页码：461 / 477

页数：17