000077226 001__ 77226 000077226 005__ 20250722154010.0 000077226 0247_ $$2doi$$a10.1088/1475-7516/2019/01/032 000077226 0248_ $$2sideral$$a110550 000077226 037__ $$aART-2019-110550 000077226 041__ $$aeng 000077226 100__ $$aAnastassopoulos, V. 000077226 245__ $$aImproved search for solar chameleons with a GridPix detector at CAST 000077226 260__ $$c2019 000077226 5060_ $$aAccess copy available to the general public$$fUnrestricted 000077226 5203_ $$aWe 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. 000077226 536__ $$9info:eu-repo/grantAgreement/ES/MINECO-FEDER/FPA2013-41085-P$$9info:eu-repo/grantAgreement/ES/MINECO-FEDER/FPA2011-24058$$9info:eu-repo/grantAgreement/EC/FP7/240054/EU/Novel Developments in Time Projection Chambers (TPCs) for Rare Event Searches in Underground Astroparticle EXperiments/TREX 000077226 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/ 000077226 590__ $$a5.21$$b2019 000077226 591__ $$aPHYSICS, PARTICLES & FIELDS$$b5 / 29 = 0.172$$c2019$$dQ1$$eT1 000077226 591__ $$aASTRONOMY & ASTROPHYSICS$$b13 / 68 = 0.191$$c2019$$dQ1$$eT1 000077226 592__ $$a0.813$$b2019 000077226 593__ $$aAstronomy and Astrophysics$$c2019$$dQ2 000077226 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion 000077226 700__ $$aAune, S. 000077226 700__ $$aBarth, K. 000077226 700__ $$aBelov, A. 000077226 700__ $$aBrauninger, H. 000077226 700__ $$aCantatore, G. 000077226 700__ $$0(orcid)0000-0003-2264-2306$$aCarmona, J.M.$$uUniversidad de Zaragoza 000077226 700__ $$0(orcid)0000-0003-3532-7540$$aCastel, J.F.$$uUniversidad de Zaragoza 000077226 700__ $$aCetin, S.A. 000077226 700__ $$aChristensen, F. 000077226 700__ $$0(orcid)0000-0002-8921-910X$$aDafni, T.$$uUniversidad de Zaragoza 000077226 700__ $$aDavenport, M. 000077226 700__ $$aDermenev, A. 000077226 700__ $$aDesch, K. 000077226 700__ $$aDobrich, B. 000077226 700__ $$aEleftheriadis, C. 000077226 700__ $$aFanourakis, G. 000077226 700__ $$aFerrer-Ribas, E. 000077226 700__ $$aFischer, H. 000077226 700__ $$aFunk, W. 000077226 700__ $$0(orcid)0000-0002-7399-7353$$aGarcia, J.A. 000077226 700__ $$aGardikiotis, A. 000077226 700__ $$0(orcid)0000-0003-0800-1588$$aGarza, J.G. 000077226 700__ $$aGazis, E.N. 000077226 700__ $$aGeralis, T. 000077226 700__ $$aGiomataris, I. 000077226 700__ $$aGninenko, S. 000077226 700__ $$aHailey, C.J. 000077226 700__ $$aHasinoff, M.D. 000077226 700__ $$aHoffmann, D.H.H. 000077226 700__ $$0(orcid)0000-0001-6327-9369$$aIguaz, F.J. 000077226 700__ $$0(orcid)0000-0003-1163-1687$$aIrastorza, I.G.$$uUniversidad de Zaragoza 000077226 700__ $$aJakobsen, A. 000077226 700__ $$aJacoby, J. 000077226 700__ $$aJakovcic, K. 000077226 700__ $$aKaminski, J. 000077226 700__ $$aKaruza, M. 000077226 700__ $$aKostoglou, S. 000077226 700__ $$aKralj, N. 000077226 700__ $$aKrcmar, M. 000077226 700__ $$aKrieger, C. 000077226 700__ $$aLakic, B. 000077226 700__ $$aLaurent, J.M. 000077226 700__ $$aLiolios, A. 000077226 700__ $$aLjubicic, A. 000077226 700__ $$0(orcid)0000-0002-5352-1884$$aLuzon, G.$$uUniversidad de Zaragoza 000077226 700__ $$aMaroudas, M. 000077226 700__ $$aMiceli, L. 000077226 700__ $$aNeff, S. 000077226 700__ $$aOrtega, I. 000077226 700__ $$aPapaevangelou, T. 000077226 700__ $$aParaschou, K. 000077226 700__ $$aPivovaroff, M.J. 000077226 700__ $$aRaffelt, G. 000077226 700__ $$aRosu, M. 000077226 700__ $$0(orcid)0000-0002-3253-7027$$aRuz, J. 000077226 700__ $$0(orcid)0000-0002-2417-7121$$aCholiz, E.R.$$uUniversidad de Zaragoza 000077226 700__ $$aSavvidis, I. 000077226 700__ $$aSchmidt, S. 000077226 700__ $$aSemertzidis, Y.K. 000077226 700__ $$aSolanki, S.K. 000077226 700__ $$aStewart, L. 000077226 700__ $$aVafeiadis, T. 000077226 700__ $$aVogel, J.K. 000077226 700__ $$aVretenar, M. 000077226 700__ $$aWuensch, W. 000077226 700__ $$aYildiz, S.C. 000077226 700__ $$aZioutas, K. 000077226 700__ $$aBrax, P. 000077226 7102_ $$12004$$2X$$aUniversidad de Zaragoza$$bDpto. Física Teórica$$cProy. investigación HCA 000077226 7102_ $$12004$$2390$$aUniversidad de Zaragoza$$bDpto. Física Teórica$$cÁrea Física Atóm.Molec.y Nucl. 000077226 773__ $$g2019, 1 (2019), 032 [18 pp.]$$pJ. Cosmol. Astropart. Phys.$$tJournal of Cosmology and Astroparticle Physics$$x1475-7516 000077226 8564_ $$s568740$$uhttps://zaguan.unizar.es/record/77226/files/texto_completo.pdf$$yVersión publicada 000077226 8564_ $$s99793$$uhttps://zaguan.unizar.es/record/77226/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada 000077226 909CO $$ooai:zaguan.unizar.es:77226$$particulos$$pdriver 000077226 951__ $$a2025-07-22-15:35:40 000077226 980__ $$aARTICLE