ALP contribution to the strong C P problem

Enguita, V. (ORCID:0000000159779635); Gavela, B. (ORCID:0000000223219190); Grinstein, B. (ORCID:0000000324474756); Quílez, P. (ORCID:0000000243272706)

doi:10.1103/physrevd.110.015024

DOE OSTI · 2474214

ALP contribution to the strong C P problem

Enguita, V. (ORCID:0000000159779635)·Gavela, B. (ORCID:0000000223219190)·Grinstein, B. (ORCID:0000000324474756)·Quílez, P. (ORCID:0000000243272706)

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Abstract

We compute the one-loop contribution to the θ ¯ parameter of an faxionlike particle (ALP) with C P -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 dipole moments. This strongly improves existing bounds on ALP-fermion C P -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. Published by the American Physical Society 2024

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BibTeX RIS

Enguita, V. (ORCID:0000000159779635), Gavela, B. (ORCID:0000000223219190), Grinstein, B. (ORCID:0000000324474756), Quílez, P. (ORCID:0000000243272706). 2024-07-23. ALP contribution to the strong C P problem. https://doi.org/10.1103/physrevd.110.015024

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