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Your search keyword '"Hasinoff, M.D."' showing total 2 results
Start Over Author "Hasinoff, M.D." Topic dark matter
2 results on '"Hasinoff, M.D."'

1. Search for solar axions by the CERN axion solar telescope with 3He buffer gas: closing the hot dark matter gap

Author

Arik, M., Aune, S., Barth, K., Belov, A., Borghi, S., Bräuninger, H., Cantatore, G., Carmona, J.M., Cetin, S.A., Collar, J.I., Da Riva, E., Dafni, T., Davenport, M., Eleftheriadis, C., Elias, N., Fanourakis, G., Ferrer-Ribas, E., Friedrich, P., Galán, J., García, J.A., Gardikiotis, A., Garza, J.G., Gazis, E.N., Geralis, T., Georgiopoulou, E., Giomataris, I., Gninenko, S., Gómez, H., Gómez Marzoa, M., Gruber, E., Guthörl, T., Hartmann, R., Hauf, S., Haug, F., Hasinoff, M.D., Hoffmann, D.H.H., Iguaz, F.J., Irastorza, I.G., Jacoby, J., Jakovčić, Krešimir, Karuza, Marin, Königsmann, K., Kotthaus, R., Krčmar, Milica, Kuster, M., Lakić, Biljana, Lang, P.M., Laurent, J.M., Liolios, A., Ljubičić, Ante, Luzón, G., Neff, S., Niinikoski, T., Nordt, A., Papaevangelou, T., Pivovaroff, M.J., Raffelt, G., Riege, H., Rodríguez, A., Rosu, M., Ruz, J., Savvidis, I., Shilon, I., Silva, P.S., Solanki, S.K., Stewart, L., Tomás, A., Tsagri, M., van Bibber, K., Vafeiadis, T., Villar, J., Vogel, J.K., Yildiz, S.C., and Zioutas, K.

Subjects
Physics::Instrumentation and Detectors, High Energy Physics::Phenomenology, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics, solar axions, photons, dark matter
Abstract

The CERN Axion Solar Telescope has finished its search for solar axions with 3He buffer gas, covering the search range 0.64 eV < m_a < 1.17 eV. This closes the gap to the cosmological hot dark matter limit and actually overlaps with it. From the absence of excess X-rays when the magnet was pointing to the Sun we set a typical upper limit on the axion-photon coupling of g_aγ < 3.3×10^(−10) GeV^(−1) at 95% C.L., with the exact value depending on the pressure setting. Future direct solar axion searches will focus on increasing the sensitivity to smaller values of g_aγ, for example by the currently discussed next generation helioscope International AXion Observatory.

Published
2013

2. Search for solar axions with the CAST experiment

Author

Lakić, Biljana, Aune, S., Barth, K., Belov, A., Borghi, S., Bräuninger, H., Cantatore, G., Carmona, J.M., Cetin, S.A., Collar, J.I., Dafni, T., Davenport, M., Eleftheriadis, C., Elias, N., Ezer, C., Fanourakis, G., Ferrer-Ribas, E., Fischer, H., Franz, J., Friedrich, P., Galán, J., Gardikiotis, A., Gazis, E.N., Geralis, T., Giomataris, I., Gninenko, S., Gómez, H., Gruber, E., Guthörl, T., Hartmann, R., Haug, F., Hasinoff, M.D., Hoffmann, D.H.H., Iguaz, F.J., Irastorza, I.G., Jacoby, J., Jakovčić, Krešimir, Kang, D., Karageorgopoulou, T., Karuza, Marin, Königsmann, K., Kotthaus, R., Krčmar, Milica, Kousouris, K., Kuster, M., Lang, P., Lasseur, C., Laurent, J.M., Liolios, A., Ljubičić, Ante, Lozza, V., Lutz, G., Luzón, G., Miller, D.W., Mirizzi, A., Morales, J., Niinikoski, T., Nordt, A., Papaevangelou, T., Pivovaroff, M.J., Raiteri, G., Raffelt, G., Rashba, T., Riege, H., Rodríguez, A., Rosu, M., Ruz, J., Savvidis, I., Semertzidis, Y., Serpico, P., Silva, P.S., Solanki, S.K., Soufli, R., Stewart, L., Tomás, A., Tsagri, M., van Bibber, K., Vafeiadis, T., Villar, J., Vogel, J.K., Walckiers, L., Wong, Y., Yildiz, S.C., Zioutas, K, O'Loughlin, Martyn, Stanič, Samo, and Veberič, Darko

Subjects
High Energy Physics::Theory, Physics::Instrumentation and Detectors, High Energy Physics::Phenomenology, axions, solar physics, dark matter
Abstract

Axions are hypothetical particles arising in models which may solve the CP problem of strong interactions. They are practically stable neutral pseudoscalar particles and also viable candidates for the dark matter of the Universe. Most of the axion experimental searches are based on the axion coupling to two photons. As a consequence of this coupling, axion could transform into photon and vice versa in external electric and magnetic fields. Axions could be produced in the solar core by conversion of thermal photons in the Coulomb fields of nuclei and electrons – the Primakoff process, and back-converted into photons in a laboratory magnetic field. The CERN Axion Solar Telescope (CAST) is designed to search for these axions by using a Large Hadron Collider prototype dipole magnet which follows the Sun during sunrise and sunset throughout the year. To explore as wide as possible range of axion masses, the operation of CAST is divided in two phases. During the phase I the experiment operated with vacuum inside the magnet bores and scanned axion masses up to 0.02 eV. In order to extend the sensitivity to higher axion masses, the magnet bores are filled with a buffer gas at various densities. In the first part of the CAST phase II, 4He was used as a buffer gas. In the ongoing second part of the phase II, CAST has been using 3He to cover axion masses up to 1 eV. So far, no evidence of axion signal has been found and CAST set the most stringent experimental limit on the axion-photon coupling constant over a broad range of axion masses.

Published
2011

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