Speaker
Víctor Enguita-Vileta
(Instituto de Física Teórica (IFT UAM-CSIC))
Description
We compute the one-loop contribution to the $\bar \theta$-parameter of an axion-like particle (ALP) with CP-odd derivative couplings. Its contribution to the neutron electric dipole moment is shown to be orders of magnitude larger than that stemming from the one-loop ALP contributions to the up- and down-quark electric and chromoelectric dipolemoments. This strongly improves existing bounds on ALP-fermion CP-odd interactions, and also sets limits on previously unconstrained couplings. The case of a general singlet scalar is analyzed as well. In addition, we explore how the bounds are modified in the presence of a Peccei-Quinn symmetry.
| Title of the Poster/Talk | Improved nEDM limits on ALP couplings to fermions |
|---|---|
| Related Papers/Preprints | 2403.12133 |
Primary authors
Belen Gavela
(Universidad Autónoma de Madrid)
Benjamin Grinstein
(University of California San Diego)
Dr
Pablo Quilez Lasanta
(University of California San Diego)
Víctor Enguita-Vileta
(Instituto de Física Teórica (IFT UAM-CSIC))
