| Title | Limits on low energy photon-photon scattering from an experiment on magnetic vacuum birefringence |
|---|---|
| Publication Type | Articolo su Rivista peer-reviewed |
| Year of Publication | 2008 |
| Authors | Bregant, M., Cantatore G., Carusotto S., Cimino R., F. Valle Della, Di Domenico G., Gastaldi U., Karuza M., Lozza V., Milotti E., Polacco E., Raiteri G., Ruoso G., Zavattini E., and Zavattini G. |
| Journal | Physical Review D - Particles, Fields, Gravitation and Cosmology |
| Volume | 78 |
| Abstract | Experimental bounds on induced vacuum magnetic birefringence can be used to improve present photon-photon scattering limits in the electronvolt energy range. Measurements with the Polarizzazione del Vuoto con Laser apparatus at both λ=1064 and 532 nm lead to bounds on the parameter Ae, describing nonlinear effects in QED, of Ae(1064)<6.6×10-21T-2@1064nm and Ae(532)<6.3×10-21T-2@532nm, respectively, at 95% confidence level, compared to the predicted value of Ae=1.32×10-24T-2. The total photon-photon scattering cross section may also be expressed in terms of Ae, setting bounds for unpolarized light of σγγ(1064)<4. 6×10-62m2 and σγγ(532)<2.7×10-60m2. Compared to the expected QED scattering cross section these results are a factor of 2×107 higher and represent an improvement of a factor about 500 on previous bounds based on ellipticity measurements and of a factor of about 1010 on bounds based on direct stimulated scattering measurements. © 2008 The American Physical Society. |
| Notes | cited By 47 |
| URL | https://www.scopus.com/inward/record.uri?eid=2-s2.0-49749118674&doi=10.1103%2fPhysRevD.78.032006&partnerID=40&md5=ac380acd372b78c6613e6912e51debdf |
| DOI | 10.1103/PhysRevD.78.032006 |
| Citation Key | Bregant2008 |
