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arXiv · 2109.03562

Solar Kaluza-Klein axion search with NEWS-G

G collaboration·Q. Arnaud·L. Balogh·C. Beaufort·A. Brossard·J. -F. Caron·M. Chapellier·J. -M. Coquillat·E. C. Corcoran·S. Crawford·A. Dastgheibi-Fard·Y. Deng·K. Dering·D. Durnford·C. Garrah·G. Gerbier·I. Giomataris·G. Giroux·P. Gorel·M. Gros·P. Gros·O. Guillaudin·E. W. Hoppe·I. Katsioulas·F. Kelly·P. Knights·S. Langrock·P. Lautridou·R. D. Martin·J. -P. Mols·J. -F. Muraz·T. Neep·K. Nikolopoulos·P. O'Brien·M. -C. Piro·D. Santos·G. Savvidis·I. Savvidis·F. A. Vazquez de Sola Fernandez·M. Vidal·R. Ward·M. Zampaolo
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Abstract

Kaluza-Klein (KK) axions appear in theories with extra dimensions as higher mass, significantly shorter lifetime, excitations of the Peccei-Quinn axion. When produced in the Sun, they would remain gravitationally trapped in the solar system, and their decay to a pair of photons could provide an explanation of the solar corona heating problem. A low-density detector would discriminate such a signal from the background, by identifying the separation of the interaction point of the two photons. The NEWS-G collaboration uses large volume Spherical Proportional Counters, gas-filled metallic spheres with a spherical anode in their centre. After observation of a single axionlike event in a 42 day long run with the SEDINE detector, a $90\%$ C.L. upper limit of $g_{a\gamma\gamma}<8.99\cdot10^{-13}\,GeV^{-1}$ is set on the axion-photon coupling for a KK axion density on Earth of $n_{a}=4.07\cdot10^{13}\,m^{-3}$ and two extra dimensions of size $R = 1\,eV^{-1}$.

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G collaboration, Q. Arnaud, L. Balogh, C. Beaufort, A. Brossard, J. -F. Caron, M. Chapellier, J. -M. Coquillat, E. C. Corcoran, S. Crawford, A. Dastgheibi-Fard, Y. Deng, K. Dering, D. Durnford, C. Garrah, G. Gerbier, I. Giomataris, G. Giroux, P. Gorel, M. Gros, P. Gros, O. Guillaudin, E. W. Hoppe, I. Katsioulas, F. Kelly, P. Knights, S. Langrock, P. Lautridou, R. D. Martin, J. -P. Mols, J. -F. Muraz, T. Neep, K. Nikolopoulos, P. O'Brien, M. -C. Piro, D. Santos, G. Savvidis, I. Savvidis, F. A. Vazquez de Sola Fernandez, M. Vidal, R. Ward, M. Zampaolo. 2021-09-08. Solar Kaluza-Klein axion search with NEWS-G. https://doi.org/10.1103/physrevd.105.012002

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