New Experimental Limit on the Photon Rest Mass with a Rotating Torsion Balance

Details New Experimental Limit on the Photon Rest Mass with a Rotating Torsion Balance New Experimental Limit on the Photon Rest Mass with a Rotating Torsion Balance

Feb 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003phrvl..90h1801l&link_type=abstract

Physical Review Letters, vol. 90, Issue 8, id. 081801

Physics

47

Experimental Tests, Photons, Particle-Theory And Field-Theory Models Of The Early Universe

Scientific paper

A rotating torsion balance method is used to detect the product of the photon mass squared and the ambient cosmic vector potential Ae. The signal is modulated by rotating the torsion balance to ensure the effectiveness of detection for all possible orientations of the vector potential. The influences of sidereal disturbances of environment are also removed by virtue of this modulation method. The experimental result shows μ2γAe<1.1×10-11 T m/m2, with μ-1γ as the characteristic length associated with photon mass. If the ambient cosmic vector potential Ae is 1012 T m due to cluster level fields, we obtain a new upper limit on photon mass of 1.2×10-51 g.

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