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A search for bremsstrahlung solar axions using the Majorana low-background BEGe detector at Kimballton (MALBEK)
- Abgrall, N;
- Aguayo, E;
- III, FT Avignone;
- Barabash, AS;
- Bertrand, FE;
- Boswell, M;
- Brudanin, V;
- Busch, M;
- Caldwell, AS;
- Chan, Y-D;
- Christofferson, CD;
- Combs, DC;
- Cooper, RJ;
- Creswick, RJ;
- Detwiler, JA;
- Doe, PJ;
- Efremenko, Yu;
- Egorov, V;
- Elliott, SR;
- Fast, JE;
- Finnerty, P;
- Fraenkle, FM;
- Galindo-Uribarri, A;
- Giovanetti, GK;
- Goett, J;
- Green, MP;
- Gruszko, J;
- Guiseppe, VE;
- Gusev, K;
- Hegai, A;
- Henning, R;
- Hoppe, EW;
- Howard, S;
- Howe, MA;
- Keeter, KJ;
- Kidd, MF;
- Knecht, A;
- Kochetov, O;
- Konovalov, SI;
- Kouzes, RT;
- LaFerriere, BD;
- Leon, J;
- Leviner, LE;
- Loach, JC;
- MacMullin, J;
- MacMullin, S;
- Marino, MG;
- Martin, RD;
- Mertens, S;
- Orrell, JL;
- O'Shaughnessy, C;
- Overman, NR;
- II, DG Phillips;
- Poon, AWP;
- Pushkin, K;
- Radford, DC;
- Rielage, K;
- Robertson, RGH;
- Ronquest, MC;
- Schubert, AG;
- Shanks, B;
- Shirchenko, M;
- Snavely, KJ;
- Snyder, N;
- Steele, D;
- Suriano, AM;
- Thompson, J;
- Timkin, V;
- Varner, RL;
- Vasilyev, S;
- Vetter, K;
- Vorren, K;
- White, BR;
- Wilkerson, JF;
- Xu, W;
- Yakushev, E;
- Young, AR;
- Yu, CH;
- Yumatov, V
- et al.
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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