TY - JOUR
T1 - Reevaluation of heavy-fermion-induced electron EDM at three loops
AU - Ema, Yohei
AU - Gao, Ting
AU - Pospelov, Maxim
N1 - Publisher Copyright:
© 2022 The Author(s)
PY - 2022/12/10
Y1 - 2022/12/10
N2 - Motivated by improved limits on electric dipole moments (EDMs), we revisit the three-loop light-by-light mechanism that transmits CP violation from a heavy fermion to a light one. Applying it to the electron EDM induced by EDMs of heavier flavors, we find additional contributions at the order me/mμ or me/mτ that were missing before and that make the result 1.4 times larger. Consequently we improve bounds on the tau EDM, and update indirect limits on the muon EDM as well as charm and bottom quark color EDMs.
AB - Motivated by improved limits on electric dipole moments (EDMs), we revisit the three-loop light-by-light mechanism that transmits CP violation from a heavy fermion to a light one. Applying it to the electron EDM induced by EDMs of heavier flavors, we find additional contributions at the order me/mμ or me/mτ that were missing before and that make the result 1.4 times larger. Consequently we improve bounds on the tau EDM, and update indirect limits on the muon EDM as well as charm and bottom quark color EDMs.
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U2 - 10.1016/j.physletb.2022.137496
DO - 10.1016/j.physletb.2022.137496
M3 - Article
AN - SCOPUS:85139843239
SN - 0370-2693
VL - 835
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
M1 - 137496
ER -