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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 (QED) ≈ 5 × 10-11. No ellipticity signal is present so far with a noise floor Φ(noise) ≈ 2.5 × 10-9 after 210 hours of data taking. The resulting ellipticity limit provides the best model independent upper limit on the coupling of axions to for axion masses above 10-3 eV.

Della Valle, F., Ejlli, A., Gastaldi, U., Messineo, G., Milotti, E., Pengo, R., et al. (2014). New PVLAS model independent limit for the axion coupling to γγ for axion masses above 1 meV. In Proceedings of the 10th Patras Workshop on Axions, WIMPs and WISPs, PATRAS 2014 (pp.67-70). Hamburg : Verlag Deutsches Elektronen-Synchrotron [10.3204/DESY-PROC-2014-03/gastaldi_ugo].

New PVLAS model independent limit for the axion coupling to γγ for axion masses above 1 meV

Della Valle F.;
2014-01-01

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 (QED) ≈ 5 × 10-11. No ellipticity signal is present so far with a noise floor Φ(noise) ≈ 2.5 × 10-9 after 210 hours of data taking. The resulting ellipticity limit provides the best model independent upper limit on the coupling of axions to for axion masses above 10-3 eV.
2014
978-393570259-1
Della Valle, F., Ejlli, A., Gastaldi, U., Messineo, G., Milotti, E., Pengo, R., et al. (2014). New PVLAS model independent limit for the axion coupling to γγ for axion masses above 1 meV. In Proceedings of the 10th Patras Workshop on Axions, WIMPs and WISPs, PATRAS 2014 (pp.67-70). Hamburg : Verlag Deutsches Elektronen-Synchrotron [10.3204/DESY-PROC-2014-03/gastaldi_ugo].
4.1 Contributo in Atti di convegno
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/1116768