J. Eills,1,2,* J. W. Blanchard,3,† L. Bougas,2 M. G. Kozlov,4,5 A. Pines,6,7 and D. Budker2,3,8,9 1School of Chemistry and Institute for Life Sciences, University of Southampton, Southampton, United Kingdom 2Johannes Gutenberg-Universität Mainz, 55128 Mainz, Germany 3Helmholtz-Institut Mainz, 55099 Mainz, Germany 4Petersburg Nuclear Physics Institute, Gatchina, 188300, Russia 5St. Petersburg El...

The amplitude of the parity-nonconserving transition between the 6S and 7S states of cesium was precisely measured with the use of a spin-polarized atomic beam. This measurement gives Im(E1pnc)/beta = -1.5935(56) millivolts per centimeter and provides an improved test of the standard model at low energy, including a value for the S parameter of -1.3(3)exp (11)theory. The nuclear spin-dependent ...

Total and parity-projected level densities of iron-region nuclei are calculated microscopically by using Monte Carlo methods for the nuclear shell model in the complete (pf + 0g9/2)-shell. The calculated total level density is found to be in good agreement with the experimental level density. The Monte Carlo calculations offer a significant improvement over the thermal Hartree-Fock approximatio...

Ann. Phys. (N.Y.) 124, 449 (1980); B. Desplanques, in Proceedings of the Eight International Conference on High Energy Physics and Nuclear Structure, Vancouver, 1979 (to be published). T. deForest, Jr. , and J.D. Walecka, Adv. Phys. 15, 1 (1966). F. Ajzenberg-Selove, Nucl. Phys. A300, 1 (1978); J. Keinonen et al. , Phys. Bev. C 22, 351 (1980). W. C. Haxton, B. F. Gibson, and E. M. Henley, unpub...

(February 9, 2008) Until 40 years ago, physicists had assumed that the fundamental forces of nature did not distinguish between left and right. That is, it was believed that the laws of physics in a mirror-symmetric universe would be the same as in ours. Then in 1957, following a suggestion by Lee and Yang [1], experimenters discovered that the weak force, which is responsible for beta decay in...

There have been suggestions to measure atomic parity nonconservation (PNC) along an isotopic chain, by taking ratios of observables in order to cancel complicated atomic structure effects. Precise atomic PNC measurements could make a significant contribution to tests of the Standard Model at the level of one loop radiative corrections. However, the results also depend upon certain features of n...