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- W2965625846 abstract "We show that the on-shell effective theory (OSEFT) is the quantum field theory counterpart of a Foldy-Wouthuysen diagonalization of relativistic quantum mechanics for massless fermions. Thus, it is free of the Zitterbewegung oscillations that would yield an ill-defined meaning to the semiclassical transport approach at short distances if derived from the pure Dirac picture. We present a detailed derivation of the collision terms in the chiral kinetic theory using the OSEFT. Collision integrals are derived up to order 1/E, where E is the energy of an on-shell fermion. At this order, the collision terms depends on the spin tensor of the fermion, and in the presence of chiral imbalance, it describes how a massless fermion of a given helicity interacts differently with the transverse photons of different circular polarization. In order to back up our results, we check that they allow us to reproduce the fermion decay rate in an ultradegenerate plasma with a chiral imbalance computed directly from QED." @default.
- W2965625846 created "2019-08-13" @default.
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- W2965625846 date "2019-08-01" @default.
- W2965625846 modified "2023-10-18" @default.
- W2965625846 title "Collision terms in Chiral Kinetic Theory from the On-Shell Effective Field Theory" @default.
- W2965625846 hasPublicationYear "2019" @default.
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