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

N Abgrall,E Aguayo,F T Avignone,A S Barabash,F E Bertrand,M Boswell,V B Brudanin,Michael P Busch,A S Caldwell,Yd Chan,C D Christofferson,D C Combs,R J Cooper, R J Creswick,J A Detwiler,P J Doe,Y V Efremenko,V Egorov, S R Elliott,J Fast, P Finnerty, F M Fraenkle,A Galindouribarri,G K Giovanetti,J Goett,M P Green,J Gruszko,V E Guiseppe,K Gusev,A Hegai,Reyco 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 Oshaughnessy,N R Overman,D G Phillips,A W P Poon,K Pushkin,D C Radford,K Rielage,R G H Robertson,M Ronquest,A Schubert,B Shanks,M Shirchenko,K J Snavely,N Snyder,D Steele,A M Suriano,John A Thompson,V Timkin,R L Varner,Sergey Vasilyev,K Vetter,K Vorren,B R White,J F Wilkerson,Wei Xu,E Yakushev,A R Young,C H Yu, V Yumatov

mag（2014）

Cited 23|Views21

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Abstract

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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