Improved search for solar chameleons with a GridPix detector at CAST

Anastassopoulos, V. ; Aune, S. ; Barth, K. ; Belov, A. ; Brauninger, H. ; Cantatore, G. ; Carmona, J.M. (Universidad de Zaragoza) ; Castel, J.F. (Universidad de Zaragoza) ; Cetin, S.A. ; Christensen, F. ; Dafni, T. (Universidad de Zaragoza) ; Davenport, M. ; Dermenev, A. ; Desch, K. ; Dobrich, B. ; Eleftheriadis, C. ; Fanourakis, G. ; Ferrer-Ribas, E. ; Fischer, H. ; Funk, W. ; Garcia, J.A. ; Gardikiotis, A. ; Garza, J.G. ; Gazis, E.N. ; Geralis, T. ; Giomataris, I. ; Gninenko, S. ; Hailey, C.J. ; Hasinoff, M.D. ; Hoffmann, D.H.H. ; Iguaz, F.J. ; Irastorza, I.G. (Universidad de Zaragoza) ; Jakobsen, A. ; Jacoby, J. ; Jakovcic, K. ; Kaminski, J. ; Karuza, M. ; Kostoglou, S. ; Kralj, N. ; Krcmar, M. ; Krieger, C. ; Lakic, B. ; Laurent, J.M. ; Liolios, A. ; Ljubicic, A. ; Luzon, G. (Universidad de Zaragoza) ; Maroudas, M. ; Miceli, L. ; Neff, S. ; Ortega, I. ; Papaevangelou, T. ; Paraschou, K. ; Pivovaroff, M.J. ; Raffelt, G. ; Rosu, M. ; Ruz, J. ; Choliz, E.R. (Universidad de Zaragoza) ; Savvidis, I. ; Schmidt, S. ; Semertzidis, Y.K. ; Solanki, S.K. ; Stewart, L. ; Vafeiadis, T. ; Vogel, J.K. ; Vretenar, M. ; Wuensch, W. ; Yildiz, S.C. ; Zioutas, K. ; Brax, P.

Resumen: We report on a new search for solar chameleons with the CERN Axion Solar Telescope (CAST). A GridPix detector was used to search for soft X-ray photons in the energy range from 200 eV to 10 keV from converted solar chameleons. No significant excess over the expected background has been observed in the data taken in 2014 and 2015. We set an improved limit on the chameleon photon coupling, beta(gamma) less than or similar to 5.7 x 10(10) for 1 < beta(m) < 10(6) at 95% C.L. improving our previous results by a factor two and for the first time reaching sensitivity below the solar luminosity bound for tachocline magnetic fields up to 12.5 T.

Idioma: Inglés

DOI: 10.1088/1475-7516/2019/01/032

Año: 2019

Publicado en: Journal of Cosmology and Astroparticle Physics 2019, 1 (2019), 032 [18 pp.]
ISSN: 1475-7516

Factor impacto JCR: 5.21 (2019)

Categ. JCR: PHYSICS, PARTICLES & FIELDS rank: 5 / 29 = 0.172 (2019) - Q1 - T1
Categ. JCR: ASTRONOMY & ASTROPHYSICS rank: 13 / 68 = 0.191 (2019) - Q1 - T1

Factor impacto SCIMAGO: 0.813 - Astronomy and Astrophysics (Q2)

Financiación: info:eu-repo/grantAgreement/EC/FP7/ 240054/EU/Novel Developments in Time Projection Chambers (TPCs) for Rare Event Searches in Underground Astroparticle EXperiments/TREX
Financiación: info:eu-repo/grantAgreement/ES/MINECO-FEDER/FPA2011-24058
Financiación: info:eu-repo/grantAgreement/ES/MINECO-FEDER/FPA2013-41085-P

Tipo y forma: Article (Published version)

Área (Departamento): Proy. investigación HCA (Dpto. Física Teórica)
Área (Departamento): Área Física Atóm.Molec.y Nucl. (Dpto. Física Teórica)