Search for solar axion emission from 7Li and D(p, γ)3He nuclear decays with the CAST γ-ray calorimeter

CAST collaboration; S. Andriamonje; S. Aune; D. Autiero; K. Barth; A. Belov; B. Beltrán; H. Bräuninger; J.M. Carmona; S. Cebrián; J.I. Collar; T. Dafni; M. Davenport; L. Di Lella; C. Eleftheriadis; J. Englhauser; G. Fanourakis; E. Ferrer-Ribas; H. Fischer; J. Franz; P. Friedrich; T. Geralis; I. Giomataris; S. Gninenko; H. Gómez; M. Hasinoff; F.H. Heinsius; D.H.H. Hoffmann; I.G. Irastorza; J. Jacoby; K. Jakovcić; D. Kang; K. Königsmann; R. Kotthaus; M. Krcmar; K. Kousouris; M. Kuster; B. Lakić; C. Lasseur; A. Liolios; A. Ljubicić; G. Lutz; G. Luzón; D.W. Miller; J. Morales; A. Ortiz; T. Papaevangelou; A. Placci; G. Raffelt; H. Riege; A. Rodríguez; J. Ruz; I. Savvidis; Y. Semertzidis; P. Serpico; L. Stewart; J. D. Vieira; J. Villar; J. Vogel; L. Walckiers; K. Zioutas

doi:10.1088/1475-7516/2010/03/032

Journal of Cosmology and Astroparticle Physics

Search for solar axion emission from ⁷Li and D(p, γ)³He nuclear decays with the CAST γ-ray calorimeter

CAST collaboration, S. Andriamonje¹, S. Aune¹, D. Autiero², K. Barth², A. Belov³, B. Beltrán⁴, H. Bräuninger⁵, J.M. Carmona⁴, S. Cebrián⁴, J.I. Collar⁶, T. Dafni^1,11, M. Davenport², L. Di Lella², C. Eleftheriadis⁷, J. Englhauser⁵, G. Fanourakis⁸, E. Ferrer-Ribas¹, H. Fischer⁹, J. Franz⁹, P. Friedrich⁵, T. Geralis⁸, I. Giomataris¹, S. Gninenko³, H. Gómez⁴, M. Hasinoff¹⁰, F.H. Heinsius⁹, D.H.H. Hoffmann¹¹, I.G. Irastorza^1,4, J. Jacoby¹², K. Jakovcić¹³, D. Kang⁹, K. Königsmann⁹, R. Kotthaus¹⁴, M. Krcmar¹³, K. Kousouris⁸, M. Kuster¹¹, B. Lakić¹³, C. Lasseur², A. Liolios⁷, A. Ljubicić¹³, G. Lutz¹⁴, G. Luzón⁴, D.W. Miller⁶, J. Morales⁴, A. Ortiz⁴, T. Papaevangelou^1,2, A. Placci², G. Raffelt¹⁴, H. Riege¹¹, A. Rodríguez⁴, J. Ruz⁴, I. Savvidis⁷, Y. Semertzidis¹⁵, P. Serpico^2,14, L. Stewart², J. D. Vieira⁶, J. Villar⁴, J. Vogel⁹, L. Walckiers² and K. Zioutas^2,15

Published 30 March 2010 • Published under licence by IOP Publishing Ltd
Journal of Cosmology and Astroparticle Physics, Volume 2010, March 2010 Citation CAST collaboration et al JCAP03(2010)032 DOI 10.1088/1475-7516/2010/03/032

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Author affiliations

¹ DAPNIA, Centre d'Études Nucléaires de Saclay, Gif-sur-Yvette, France

² European Organization for Nuclear Research (CERN),CH-1211 Genève 23, Switzerland

³ Institute for Nuclear Research, Russian Academy of Sciences, Moscow, Russia

⁴ Instituto de Física Nuclear y Altas Energías, Universidad de Zaragoza, Zaragoza, Spain

⁵ Max-Planck-Institut für extraterrestrische Physik, Giessenbachstrasse, 85748 Garching, Germany

⁶ Enrico Fermi Institute and KICP, University of Chicago, Chicago, IL, U.S.A.

⁷ Aristotle University of Thessaloniki, Thessaloniki, Greece

⁸ National Center for Scientific Research ``Demokritos'', Athens, Greece

⁹ Albert-Ludwigs-Universität Freiburg, Freiburg, Germany

¹⁰ Department of Physics and Astronomy, University of British Columbia, Vancouver, Canada

¹¹ Technische Universität Darmstadt, Institut für Kernphysik, Schlossgartenstrasse 9, 64289 Darmstadt, Germany

¹² Johann Wolfgang Goethe-Universität, Institut für Angewandte Physik, Frankfurt am Main, Germany

¹³ Rudjer Bošković Institute, Bijenicka cesta 54, P.O.Box 180, HR-10002 Zagreb, Croatia

¹⁴ Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), Föhringer Ring 6, 80805 München, Germany

¹⁵ University of Patras, Patras, Greece

Dates

Received 21 August 2009
Accepted 5 March 2010
Published 30 March 2010

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Abstract

We present the results of a search for a high-energy axion emission signal from ⁷Li (0.478 MeV) and D(p, γ)³He (5.5 MeV) nuclear transitions using a low-background γ-ray calorimeter during Phase I of the CAST experiment. These so-called ``hadronic axions'' could provide a solution to the long-standingstrong-CP problem and can be emitted from the solar core from nuclear M1 transitions. This is the first such search for high-energy pseudoscalar bosons with couplings to nucleons conducted using a helioscope approach. No excess signal above background was found.

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