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| Contribution to a conference proceedings/Contribution to a book | PUBDB-2016-05913 |
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2014
Verlag Deutsches Elektronen-Synchrotron
Hamburg
ISBN: 978-3-935702-59-1
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Please use a persistent id in citations: doi:10.3204/DESY-PROC-2014-03/gastaldi_ugo
Abstract: During 2014 the PVLAS experiment has started data taking with a new apparatus installed at the INFN Section of Ferrara, Italy. The main target of the experiment is the observation of magnetic birefringence of vacuum. According to QED, the ellipticity generated by the magnetic birefringence of vacuum in the experimental apparatus is expected to be $\psi^{\rm(QED)} \approx 5\times10^{-11}$. No ellipticity signal is present so far with a noise floor $\psi^{\rm(noise)} \approx 2.5\times10^{-9}$ after 210 hours of data taking. The resulting ellipticity limit provides the best model independent upper limit on the coupling of axions to $\gamma\gamma$ for axion masses above $10^{-3}$~eV.
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Book/Proceedings/Report
Axions, WIMPs and WISPs: Proceedings, 10th Patras workshop, PATRAS 2014, AXION-WIMP 2014, Geneva, Switzerland, June 29-July 4, 2014
10th Patras Workshop on Axions, WIMPs and WISPs, AXION-WIMP 2014, GenevaGeneva, Switzerland, 29 Jun 2014 - 4 Jul 2014
Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-PROC 207 p (2014) [10.3204/DESY-PROC-2014-03]
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