Header

UZH-Logo

Maintenance Infos

Consistent Treatment of Axions in the Weak Chiral Lagrangian


Bauer, Martin; Neubert, Matthias; Renner, Sophie; Schnubel, Marvin; Thamm, Andrea (2021). Consistent Treatment of Axions in the Weak Chiral Lagrangian. Physical Review Letters, 127(8):081803.

Abstract

We present a consistent implementation of weak decays involving an axion or axionlike particle in the context of an effective chiral Lagrangian. We argue that previous treatments of such processes have used an incorrect representation of the flavor-changing quark currents in the chiral theory. As an application, we derive model-independent results for the decays K−→π−a and π−→e−¯νea at leading order in the chiral expansion and for arbitrary axion couplings and mass. In particular, we find that the K−→π−a branching ratio is almost 40 times larger than previously estimated.

Abstract

We present a consistent implementation of weak decays involving an axion or axionlike particle in the context of an effective chiral Lagrangian. We argue that previous treatments of such processes have used an incorrect representation of the flavor-changing quark currents in the chiral theory. As an application, we derive model-independent results for the decays K−→π−a and π−→e−¯νea at leading order in the chiral expansion and for arbitrary axion couplings and mass. In particular, we find that the K−→π−a branching ratio is almost 40 times larger than previously estimated.

Statistics

Citations

Dimensions.ai Metrics
26 citations in Web of Science®
27 citations in Scopus®
Google Scholar™

Altmetrics

Downloads

19 downloads since deposited on 27 Aug 2021
3 downloads since 12 months
Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Physics Institute
Dewey Decimal Classification:530 Physics
Scopus Subject Areas:Physical Sciences > General Physics and Astronomy
Uncontrolled Keywords:General Physics and Astronomy
Language:English
Date:20 August 2021
Deposited On:27 Aug 2021 15:23
Last Modified:25 Feb 2024 02:42
Publisher:American Physical Society
ISSN:0031-9007
OA Status:Hybrid
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.1103/physrevlett.127.081803
Project Information:
  • : FunderUniversität Zürich
  • : Grant ID
  • : Project Title
  • : FunderDeutsche Forschungsgemeinschaft
  • : Grant ID
  • : Project Title
  • : FunderInstituto Nazionale di Fisica Nucleare
  • : Grant ID
  • : Project Title
  • : FunderPauli Center
  • : Grant ID
  • : Project Title
  • Content: Published Version
  • Licence: Creative Commons: Attribution 4.0 International (CC BY 4.0)