Typ

Artikel in einem Journal

Gebiet

Anderes Gebiet

Autor

V. Anastassopoulos, …, K. Desch, J. Kaminski, C. Krieger, S. Schmidt et al (für die CAST-Kollaboration)

Titel

Improved Search for Solar Chameleons with a GridPix Detector at CAST

Datum

2019-01

Reportnummer

JCAP01(2019)032

Kurzfassung

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 signiffcant 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, β_γ < 5.7e10 for 1 < β_m < e6 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.

Journal

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