Axion-electron coupling from the RGB tip of Globular Clusters

Alessandro Mirizzi; Inmaculata Dominguez; Maurizio Giannotti; Oscar Straniero

Axion-electron coupling from the RGB tip of Globular Clusters

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arxiv 1802.10357 v1 pith:K5M3LTEY submitted 2018-02-28 astro-ph.SR

Oscar Straniero , Inmaculata Dominguez , Maurizio Giannotti , Alessandro Mirizzi This is my paper

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keywords axion-electronclustercouplingglobularavailableclustersconstraintdevoted

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We present a preliminary study of the Globular Cluster RGB devoted to improve the available constraint for the axion-electron coupling. By means of multi-band IR photometry of the cluster M3 we obtain g_{ae}/10^{-13} < 2.57 (95\% C.L.).

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Core Composition Effects on the QCD Axion Mass Limit from Neutron Star Cooling
hep-ph 2026-06 unverdicted novelty 4.0 of 10

Varying neutron star core composition with hyperons and Delta resonances mildly affects the QCD axion mass limit from cooling, potentially bringing the DFSZ limit into the IAXO sensitivity window.

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