The vacuum polarization tensor in strong external magnetic fields has been evaluated numerically for various strengths of magnetic fields and momenta of photons under the threshold of the e± pair creation. The fitting formula has been obtained which reproduces the calculated results within 10% of error. The proper time method is employed further to obtain the retarded polarization tensor for finite temperature plasmas.
|ジャーナル||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|出版ステータス||Published - 2002 2 15|
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