Worldline sphaleron for thermal Schwinger pair production

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http://hdl.handle.net/10138/249027

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Gould , O , Rajantie , A & Xie , C 2018 , ' Worldline sphaleron for thermal Schwinger pair production ' , Physical Review D , vol. 98 , no. 5 , 056022 . https://doi.org/10.1103/PhysRevD.98.056022

Title: Worldline sphaleron for thermal Schwinger pair production
Author: Gould, Oliver; Rajantie, Arttu; Xie, Cheng
Contributor: University of Helsinki, Helsinki Institute of Physics
Date: 2018-09-25
Language: eng
Number of pages: 15
Belongs to series: Physical Review D
ISSN: 2470-0010
URI: http://hdl.handle.net/10138/249027
Abstract: With increasing temperatures, Schwinger pair production changes from a quantum tunneling to a classical, thermal process, determined by a worldline sphaleron. We show this and calculate the corresponding rate of pair production for both spinor and scalar quantum electrodynamics, including the semiclassical prefactor. For electron-positron pair production from a thermal bath of photons and in the presence of an electric field, the rate we derive is faster than both perturbative photon fusion and the zero temperature Schwinger process. We work to all-orders in the coupling and hence our results are also relevant to the pair production of (strongly coupled) magnetic monopoles in heavy-ion collisions.
Subject: NONRELATIVISTIC QUANTUM ELECTRODYNAMICS
WEINBERG-SALAM THEORY
HEAVY-ION COLLISIONS
FINITE-TEMPERATURE
FIELD-THEORY
ELECTROMAGNETIC-FIELD
MAGNETIC MONOPOLES
PHASE-TRANSITIONS
SMALL DISTANCES
EARLY UNIVERSE
114 Physical sciences
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