Reevaluation of heavy-fermion-induced electron EDM at three loops

Yohei Ema; Ting Gao; Maxim Pospelov

Physics Letters B (Dec 2022)

Reevaluation of heavy-fermion-induced electron EDM at three loops

Yohei Ema,
Ting Gao,
Maxim Pospelov

Affiliations

Yohei Ema: William I. Fine Theoretical Physics Institute, School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455, USA
Ting Gao: School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455, USA; Corresponding author.
Maxim Pospelov: William I. Fine Theoretical Physics Institute, School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455, USA; School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455, USA

Journal volume & issue: Vol. 835
p. 137496

Abstract

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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.

Published in Physics Letters B

ISSN: 0370-2693 (Print); 1873-2445 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Science: Physics
Website: http://www.journals.elsevier.com/physics-letters-b/

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