ALP contribution to the strong <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>C</mml:mi><mml:mi>P</mml:mi></mml:math> problem-Reference-Cited by-同舟云学术

ALP contribution to the strong CP problem

Published:2024-07-23 Issue:1 Volume:110 Page:
ISSN:2470-0010
Container-title:Physical Review D
language:en
Short-container-title:Phys. Rev. D

Author:

Enguita V.¹²^ORCID,Gavela B.¹²^ORCID,Grinstein B.³^ORCID,Quílez P.³^ORCID

Affiliation:

1. Universidad Autónoma de Madrid

2. IFT UAM-CSIC

3. University of California

Abstract

We compute the one-loop contribution to the θ¯ parameter of an faxionlike 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 dipole moments. 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.

Published by the American Physical Society

2024

Funder

Horizon 2020 Framework Programme

H2020 Marie Sklodowska-Curie Actions

U.S. Department of Energy

Ministerio de Ciencia, Innovación y Universidades

Agencia Estatal de Investigación

Ministerio de Ciencia e Innovación

Publisher

American Physical Society (APS)

Link

http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevD.110.015024/fulltext

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