ar X iv : 1 50 7 . 07 80 2 v 1 [ he p - ph ] 2 8 Ju l 2 01 5 Critical Schwinger pair production
نویسندگان
چکیده
We investigate Schwinger pair production in spatially inhomogeneous electric backgrounds. A critical point for the onset of pair production can be approached by fields that marginally provide sufficient electrostatic energy for an off-shell long-range electron-positron fluctuation to become a real pair. Close to this critical point, we observe features of universality which are analogous to continuous phase transitions in critical phenomena with the pair-production rate serving as an order parameter: electric backgrounds can be subdivided into universality classes and the onset of pair production exhibits characteristic scaling laws. An appropriate design of the electric background field can interpolate between power-law scaling, essential BKT-type scaling and a power-law scaling with log corrections. The corresponding critical exponents only depend on the large-scale features of the electric background, whereas the microscopic details of the background play the role of irrelevant perturbations not affecting criticality.
منابع مشابه
ar X iv : 0 80 7 . 10 58 v 2 [ he p - ph ] 1 4 Ju l 2 00 8 July 14 , 2008 top 2008 Conference Summary
This is a summary of the talks presented at the International Workshop on Top Quark Physics (top2008) held in Elba, Italy, May 18-24, 2008.
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