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White dwarfs as a probe of exceptionally light QCD axions

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arxiv 2211.02661 v2 pith:AZ7TC4JL submitted 2022-11-04 hep-ph astro-ph.HEastro-ph.SR

White dwarfs as a probe of exceptionally light QCD axions

classification hep-ph astro-ph.HEastro-ph.SR
keywords axionsdwarfswhiteaxionexceptionallylightprobestellar
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We study the effects of exceptionally light QCD axions on the stellar configuration of white dwarfs. At finite baryon density, the non-derivative coupling of the axion to nucleons displaces the axion from its in-vacuum minimum which implies a reduction of the nucleon mass. This dramatically alters the composition of stellar remnants. In particular, the modifications of the mass-radius relationship of white dwarfs allow us to probe large regions of unexplored parameter space without requiring that axions are dark matter.

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Cited by 8 Pith papers

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