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Second-order chiral kinetic theory from the Wigner function approach
Phys. Rev. D 112, 016001 – Published 2 July, 2025
DOI: https://doi.org/10.1103/r12y-8g4k
Abstract
We present a systematic method to derive the chiral kinetic theory from the Wigner equations based on quantum field theory order by order. We take special effort to derive the chiral kinetic theory in seven-dimensional phase space from the eight-dimensional chiral kinetic theory. We give the seven-dimensional chiral kinetic theory up to second order of semiclassical expansion. We find some new second-order contributions compared with other approaches.
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