Atomic parity nonconservation and nuclear anapole moments

作者：Haxton WC^*; Wieman CE

来源：Annual Review of Nuclear and Particle Science, 2001, 51(1): 261-293.

DOI：10.1146/annurev.nucl.51.101701.132458

• radiative corrections
• hadronic weak interactions

Anapole moments are parity-odd, time-reversal-even moments of the El projection of the electromagnetic current. Although it was recognized, soon after the discovery of parity violation in the weak interaction, that elementary particles and composite systems such as nuclei must have anapole moments, it proved difficult to isolate this weak radiative correction. The first successful measurement, an extraction of the nuclear anapole moment of (131)Cs from the hyperfine dependence of the atomic parity violation, was obtained only recently. An important anapole moment bound in thallium also exists. We discuss these measurements and their significance as tests of the hadronic weak interaction, focusing on the mechanisms that operate within the nucleus to generate the anapole moment. The atomic results place new constraints on weak meson-nucleon couplings, constraints we compare to existing bounds from a variety of (p) over right arrow + p and nuclear tests of parity nonconservation.

• 出版日期2001