Experimental Limits on the Photon Mass and Cosmic Magnetic Vector Potential
نویسنده
چکیده
A novel experimental approach based on a toroid Cavendish balance is used to evaluate the product of photon mass squared and the ambient cosmic magnetic vector potential A. The method is based on the energy density of the vector potential in the presence of photon mass, not on measurement of the magnetic field. The experiment discloses Amg , 2 3 10 29 T mym2, with m21 g as the characteristic length associated with photon mass. Consequently, if the ambient magnetic vector potential is A ø 1012 T m due to cluster level fields, m21 g . 2 3 10 10 m. If we conservatively use galactic fields prior to a reversal, then m21 g . 1 3 10 9 m, a figure still superior to that derived from the Jovian magnetic field. [S0031-9007(98)05451-9]
منابع مشابه
ar X iv : h ep - p h / 03 03 14 3 v 1 1 8 M ar 2 00 3 Can the Limits on Photon Mass be Obtained from the Recent Experiments ?
In the recent two experiments [Phys. Rev. Lett. 80, 1826–1829 (1998) and Phys. Rev. Lett. 90, 081801 (2003)] only the product, μ2γAamb, is observed. In order to get a limit on photon mass μγ , one must determine the ambient cosmic magnetic vector potential Aamb. In this note we point out that the ambient vector potential Aamb cannot be uniquely determined by the definition of the vector potenti...
متن کاملNew experimental limit on the photon rest mass with a rotating torsion balance.
A rotating torsion balance method is used to detect the product of the photon mass squared and the ambient cosmic vector potential A(e). 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....
متن کاملA study on the lateral distribution of Cherenkov light in extensive air showers
The dependence of the lateral distribution of Cherenkov light in simulated extensive air showers to the energy and the mass of the primary cosmic rays has been studied. It has been shown that a previous claim about mass independent proportionality of shower energy to the total Cherenkov photon number is not valid in energies below EEAS ~ 1014 eV. We have found that the core distance of the so c...
متن کاملConstraining resonant photon-axion conversions in the Early Universe
The presence of a primordial magnetic field would have induced resonant conversions between photons and axion-like particles (ALPs) during the thermal history of the Universe. These conversions would have distorted the blackbody spectrum of the cosmic microwave background (CMB). In this context, we derive bounds on the photon-ALP resonant conversions using the high precision CMB spectral data c...
متن کاملThe BMV project: Search for photon oscillations into massive particles
In this contribution to PSAS08 we report on the research activities developed in our Toulouse group, in the framework of the BMV project, concerning the search for photon oscillations into massive particles, such as axion-like particles in the presence of a strong transverse magnetic field. We recall our main result obtained in collaboration with LULI at École Polytechnique (Palaiseau, France)....
متن کامل