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Improved hot dark matter bound on the QCD axion
We obtain a reliable cosmological bound on the axion mass <math display="inline"><msub><mi>m</mi><mi>a</mi></msub></math> by (1) deriving the production rate directly from pion-pion scattering data, which overcomes the breakdown of chiral per...
| Autores principales: | , , |
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| Lenguaje: | eng |
| Publicado: |
2022
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1103/PhysRevLett.131.011004 http://cds.cern.ch/record/2840599 |