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arxiv 1403.0475 v4 pith:TXIGE5ET submitted 2014-03-03 astro-ph.HE hep-ph

A search for bremsstrahlung solar axions using the Majorana low-background BEGe detector at Kimballton (MALBEK)

N. Abgrall , E. Aguayo , F.T. Avignone III , A.S. Barabash , F.E. Bertrand , M. Boswell , V. Brudanin , M. Busch
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A.S. Caldwell Y-D. Chan C.D. Christofferson D.C. Combs R.J. Cooper R.J. Creswick J.A. Detwiler P.J. Doe Yu. Efremenko V. Egorov S.R. Elliott J.E. Fast P. Finnerty F.M. Fraenkle A. Galindo-Uribarri G.K. Giovanetti J. Goett M.P. Green J. Gruszko V.E. Guiseppe K. Gusev A. Hegai R. Henning E.W. Hoppe S. Howard M.A. Howe K.J. Keeter M.F. Kidd A. Knecht O. Kochetov S.I. Konovalov R.T. Kouzes B.D. LaFerriere J. Leon L.E. Leviner J.C. Loach J. MacMullin S. MacMullin M.G. Marino R.D. Martin S. Mertens J.L. Orrell C. O'Shaughnessy N.R. Overman D.G. Phillips II A.W.P. Poon K. Pushkin D.C. Radford K. Rielage R.G.H. Robertson M.C. Ronquest A.G. Schubert B. Shanks M. Shirchenko K.J. Snavely N. Snyder D. Steele A.M. Suriano J. Thompson V. Timkin R.L. Varner S. Vasilyev K. Vetter K. Vorren B.R. White J.F. Wilkerson W. Xu E. Yakushev A.R. Young C.H. Yu V. Yumatov
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classification astro-ph.HE hep-ph
keywords axionssolardetectorgermaniumlow-backgroundmajoranasearchannual
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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A low-background, high-purity germanium detector has been used to search for evidence of low-energy, bremsstrahlung-generated solar axions. An upper bound of $1.36\times 10^{-11}$ $(95% CL)$ is placed on the direct coupling of DFSZ model axions to electrons. The prospects for the sensitivity of the Majorana Demonstrator array of point-contact germanium detectors to solar axions are discussed in the context of the model-independent annual modulation due to the seasonal variation of the earth-sun distance.

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