Improved indirect limits on charm and bottom quark EDMs

Abstract

We derive indirect limits on the charm and bottom quark electric dipole moments (EDMs) from paramagnetic AMO and neutron EDM experiments. The charm and bottom quark EDMs generate $CP$-odd photon-gluon operators and light quark EDMs at the $c$- and $b$-quark mass thresholds. These $CP$-odd operators induce the $CP$-odd semi-leptonic operator $C_S$ and the neutron EDM below the QCD scale that are probed by the paramagnetic and neutron EDM experiments, respectively. The bound from $C_S$ is $|d_c|<1.3\times 10^{-20}e\mathrm{cm}$ for the charm quark and $|d_b|<7.6\times 10^{-19}e\mathrm{cm}$ for the bottom quark, with its uncertainty estimated as 10%. The neutron EDM provides a stronger bound, $|d_c|<6\times 10^{-22}e\mathrm{cm}$ and $|d_b|<2\times 10^{-20}e\mathrm{cm}$, though with a larger hadronic uncertainty.

19 pages, 3 figures

References in corpus (7)

• Measurement of the Positive Muon Anomalous Magnetic Moment to 0.46 ppm
• Measurement of the permanent electric dipole moment of the neutron
• Reevaluation of Neutron Electric Dipole Moment with QCD Sum Rules
• Upper limits on electric dipole moments of tau-lepton, heavy quarks, and W-boson
• Search for a muon EDM using the frozen-spin technique
• Electric dipole moments, from e to tau
• Beautiful and charming chromodipole moments

Cited by in corpus (5)

• Reevaluation of heavy-fermion-induced electron EDM at three loops
• Nonlocal gluon condensates in QCD sum rules
• ALP contribution to the Strong CP problem
• Electric Dipole Moments as Probes of $B$ Anomaly
• Precise Measurement of Chromoelectric Dipole Moment of the Charm Quark