CAST constraints on the axion-electron coupling

In non-hadronic axion models, which have a tree-level axion-electron interaction, the Sun produces a strong axion flux by bremsstrahlung, Compton scattering, and axiorecombination, the "BCA processes." Based on a new cal
In non-hadronic axion models, which have a tree-level axion-electron interaction, the Sun produces a strong axion flux by bremsstrahlung, Compton scattering, and axiorecombination, the "BCA processes." Based on a new calculation of this flux, including for the first time  axio-recombination, we derive limits on the axion-electron Yukawa coupling gae and axion-photon interaction strength ga  using the CAST phase-I data (vacuum phase). For ma <~ 10 meV/c2 we find ga  gae < 8.1 × 10−23 GeV−1 at 95% CL. We stress that a next-generation axion helioscope such as the proposed IAXO could push this sensitivity into a range beyond stellar energy-loss limits and test the hypothesis that white-dwarf cooling is dominated by axion emission.
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Author:Klaus Barth, Alexander Belov, Berta Beltran, Heinrich Bräuninger, José Manuel Carmona, Juan I. Collar, Theopisti Dafni, Martyn Davenport, Luigi Di Lella, Christos Eleftheriadis, Jakob Englhauser, George Fanourakis, Ester Ferrer-Ribas, Horst Fischer, Jürgen Franz, Peter Friedrich, Javier Galán, J. A. García, Theodoros Geralis, Ioanis Giomataris, Sergei Gninenko, Héctor Gómez, Michael D. Hasinoff, Fritz Herbert Heinsius, Dieter H. H. Hoffmann, Igor Garcia Irastorza, Joachim Jacoby, Kresimir Jakovčić, Donghwa Kang, Kay Königsmann, Rainer Kotthaus, Konstantinos Kousouris, Milica Krčmar, M. Kuster, Biljana Lakić, Anastasios Liolios, Ante Ljubičić, Gerhard Lutz, Gloria Luzón, David W. Miller, Thomas Papaevangelou, Mike J. Pivovaroff, Georg Raffelt, Javier Redondo, Hans Riege, A. Rodríguez, Jaime Ruz, Ilias Savvidis, Yannis Semertzidis, Laura Stewart, Karl van Bibber, Joaquin D. Vieira, José A. Villar, Julia K. Vogel, Louis Walckiers, Konstantin Zioutas
URN:urn:nbn:de:hebis:30:3-259158
DOI:http://dx.doi.org/10.1088/1475-7516/2013/05/010
ISSN:1475-7516
ArXiv Id:http://arxiv.org/abs/1302.6283
Parent Title (English):Journal of cosmology and astroparticle physics
Publisher:IOP
Place of publication:London
Document Type:Article
Language:English
Date of Publication (online):2013/05/09
Date of first Publication:2013/05/09
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2013/06/14
Tag:axions; dark matter experiments; solar physics; white and brown dwarfs
Volume:2013
Issue:5
Pagenumber:17
Note:
c 2013 IOP Publishing Ltd and Sissa Medialab srl. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 License. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
HeBIS PPN:347115691
Institutes:Physik
Dewey Decimal Classification:530 Physik
PACS-Classification:14.80.Mz Axions and other Nambu-Goldstone bosons (Majorons, familons, etc.)
97.10.Ld Magnetic and electric fields; polarization of starlight
97.10.Me Mass loss and stellar winds
97.20.Rp Faint blue stars (including blue stragglers), white dwarfs, degenerate stars, nuclei of planetary nebulae (for planetary nebulae, see 98.38.Ly or 98.58.Li)
Sammlungen:Universitätspublikationen
Licence (German):License LogoCreative Commons - Namensnennung 3.0

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