ar X iv : h ep - p h / 95 02 25 6 v 1 8 F eb 1 99 5 Axion detection by ring lasers ∗
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چکیده
A ring-laser experiment, similar to the Canterbury ring laser, to detect axion-and qed-induced vacuum birefringence is proposed. It uses a slowly modulated magnetic field and a novel polarization geometry. Both axion coupling and vacuum birefringence would modulate the Sagnac beat frequency. A null result could place sensitive bounds on the axion mass and on two-photon coupling. The axion was originally introduced [1] to explain the absence of CP violation in the strong interaction. Axions also arise in supersymmetric and superstring theories and are candidates for dark matter in the universe. Laboratory experiments and a host of astrophysical arguments [2] constrain the axion mass to between 10 −6 eV and 10 −3 eV. A number of optical experiments have searched for such axions which couple to two photons either directly or via " triangle diagrams " of charged particles. Sikivie [3] suggested that relic axions could be detected through their conversion to photons in a resonant cavity bathed in a strong magnetic field. Experiments of this sort, which rely on the assumption that axions form a significant component of the galactic halo, have yet to confirm the presence of axions [4]. Attempts to produce axions and detect their * hep-ph/9502256, submitted to Phys.
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تاریخ انتشار 1995