An Improved Search for the Neutron Electric Dipole Moment
Abstract
A permanent electric dipole moment of fundamental spin-1/2 particles violates both parity (P) and time re- versal (T) symmetry, and hence, also charge-parity (CP) symmetry since there is no sign of CPT-violation. The search for a neutron electric dipole moment (nEDM) probes CP violation within and beyond the Stan- dard Model. The experiment, set up at the Paul Scherrer Institute (PSI), an improved, upgraded version of the apparatus which provided the current best experimental limit, dn < 2.9E-26 ecm (90% C.L.), by the RAL/Sussex/ILL collaboration: Baker et al., Phys. Rev. Lett. 97, 131801 (2006). In the next two years we aim to improve the sensitivity of the apparatus to sigma(dn) = 2.6E-27 ecm corresponding to an upper limit of dn < 5E-27 ecm (95% C.L.), in case for a null result. In parallel the collaboration works on the design of a new apparatus to further increase the sensitivity to sigma(dn) = 2.6E-28 ecm.
Keywords
Cite
@article{arxiv.1110.1505,
title = {An Improved Search for the Neutron Electric Dipole Moment},
author = {M. Burghoff and A. Schnabel and G. Ban and T. Lefort and Y. Lemiere and O. Naviliat-Cuncic and E. Pierre and G. Quemener and J. Zejma and M. Kasprzak and P. Knowles and A. Weis and G. Pignol and D. Rebreyend and S. Afach and G. Bison and J. Becker and N. Severijns and S. Roccia and C. Plonka-Spehr and J. Zennerz and W. Heil and H. C. Koch and A. Kraft and T. Lauer and Yu. Sobolev and Z. Chowdhuri and J. Krempel and B. Lauss and A. Mtchedlishvili and P. Schmidt-Wellenburg and G. Zsigmond and M. Fertl and B. Franke and M. Horras and K. Kirch and F. Piegsa},
journal= {arXiv preprint arXiv:1110.1505},
year = {2011}
}
Comments
APS Division for particles and fields, Conference Proceedings, Two figures