$CP$ -nonconserving effects in quantum chromodynamics

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1 April 1979

journal article
research article
Published by American Physical Society (APS) in Physical Review D

Vol. 19 (7) , 2227-2230
DOI:10.1103/physrevd.19.2227

Abstract

The instanton-generated

CP

-violating perturbation is shown to have a form

\frac{3 \bar{θ} m_{u} m_{d} m_{s}}{(m_{u} m_{d} + m_{u} m_{s} + m_{d} m_{s})} (\bar{ψ} i γ_{5} ψ)

for

\bar{θ} ≪ 1

. The induced neutron electric dipole moment, evaluated in the framework of the MIT bag model, is

d_{n} = 8.2 \times 10^{- 16} \bar{θ} e

cm.

Keywords

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