Limits on Spin-Mass Couplings within the Axion Window
| Autor: | A. N. Youdin, D. Krause, Steve K. Lamoreaux, L. R. Hunter, K. Jagannathan |
|---|---|
| Rok vydání: | 1996 |
| Předmět: | |
| Zdroj: | Physical Review Letters. 77:2170-2173 |
| ISSN: | 1079-7114 0031-9007 |
| DOI: | 10.1103/physrevlett.77.2170 |
| Popis: | We compare the relative precession frequencies of Hg and Cs magnetometers as a function of the position of two 475 kg lead masses with respect to an applied magnetic field. Our observations limit the size of a possible monopole-dipole interaction expected to be produced by a pseudoscalar particle such as the axion. For a range of 20 cm, the products of the scalar and pseudoscalar couplings $({g}_{s}{g}_{p}/\ensuremath{\Elzxh}c)$ are found to be less than $2.3\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}29}$ and $3.6\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}29}$ for couplings to the electron and neutron spins, respectively. The $e(n)$ limits are approximately 3 (4) orders of magnitude better than earlier experiments. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|