Abstract
A strong electromagnetic field may modify the refractive index of the normal vacuum, which can be reduced to the light-light scattering amplitude via virtual vacuum polarizations in a microscopic sense. In order to observe the increase of the refractive index, Cherenkov light emissions associated with relativistic electrons into the strong field can be utilized as an experimental probe. In this letter, we will present the results of an experimental search for Cherenkov emission with a laser intensity of 1017 W/cm2 with a wavelength of 800 nm and an electron beam of 35.4 MeV/c, in which the expected Compton energy and indications of unexpected lower energies in the visible range were observed.
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References
J. Magueijo, “New Varying Speed of Light Theories,” Rep. Prog. Phys. 66, 2025 (2003).
K. Adcox, et al., “Formation of Dense Partonic Matter in Relativistic Nucleus Nucleus Collisions at Rhic: Experimental Evaluation by the Phenix Collaboration,” Nucl. Phys. A 757, 184–283 (2005).
G. Amelino-Camelia, John R. Ellis, N. E. Mavromatos, D. V. Nanopoulos, and Subir Sarkar, “Potential Sensitivity of Gamma-Ray Burster Observations to Wave Dispersion in Vacuo,” Nature 393, 763–765 (1998).
S. Julian Schwinger, “On Gauge Invariance and Vacuum Polarization”, Phys. Rev. 82, 664–679 (1951).
A. Ringwald, “Pair Production from Vacuum at the Focus of an X-ray Free Electron Laser,” Phys. Lett. 6510, 107–116 (2001).
I. M. Dremin, “Cherenkov Radiation and Pair Production by Particles Traversing Laser Beams,” JETP Lett. 76, 151–154 (2002).
Johann Rafelski, “Electromagnetic Fields in the qcd Vacuum,” hep-ph/9806389, 1998.
P. Chen, G. Horton-Smith, T. Ohgaki, et al., “Cain: Gonglomerat d’Abel et d’Interactions Nonlineaires,” Nucl. Instrum. Methods A 355, 107–110 (1995).
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Original Text © Astro, Ltd., 2006.
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Homma, K., Haruna, K., Kohara, R. et al. A test of virtual vacuum polarizations in a strong electromagnetic field. Laser Phys. 16, 278–283 (2006). https://doi.org/10.1134/S1054660X06020125
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DOI: https://doi.org/10.1134/S1054660X06020125