Limits on Low Energy Photon-Photon Scattering from an Experiment on Magnetic Vacuum Birefringence

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dc.creatorBregant, M.
dc.creatorCantatore, G.
dc.creatorCarusotto, S.
dc.creatorCimino, R.
dc.creatorDella Valle, F.
dc.creatorDi Domenico, G.
dc.creatorGastaldi, U.
dc.creatorKaruza, M.
dc.creatorLozza, V.
dc.creatorMilotti, E.
dc.creatorPolacco, E.
dc.creatorRaiteri, G.
dc.creatorRuoso, G.
dc.creatorZavattini, E.
dc.creatorZavattini, G.
dc.date2008-05-20
dc.date.accessioned2026-07-07T11:50:57Z
dc.date.available2026-07-07T11:50:57Z
dc.descriptionExperimental bounds on induced vacuum magnetic birefringence can be used to improve present photon-photon scattering limits in the electronvolt energy range. Measurements with the PVLAS apparatus (E. Zavattini {\it et al.}, Phys. Rev. D {\bf77} (2008) 032006) at both $λ= 1064$ nm and 532 nm lead to bounds on the parameter {\it A$_{e}$}, describing non linear effects in QED, of $A_{e}^{(1064)} < 6.6\cdot10^{-21}$ T$^{-2}$ @ 1064 nm and $A_{e}^{(532)} < 6.3\cdot10^{-21}$ T$^{-2}$ @ 532 nm, respectively, at 95% confidence level, compared to the predicted value of $A_{e}=1.32\cdot10^{-24}$ T$^{-2}$. The total photon-photon scattering cross section may also be expressed in terms of $A_e$, setting bounds for unpolarized light of $σ_{γγ}^{(1064)} < 4.6\cdot10^{-62}$ m$^{2}$ and $σ_{γγ}^{(532)} < 2.7\cdot10^{-60}$ m$^{2}$. Compared to the expected QED scattering cross section these results are a factor of $\simeq2\cdot10^{7}$ higher and represent an improvement of a factor about 500 on previous bounds based on ellipticity measurements and of a factor of about $10^{10}$ on bounds based on direct stimulated scattering measurements.
dc.identifierhttps://arxiv.org/abs/0805.3036
dc.identifierhttp://arxiv.org/abs/0805.3036
dc.identifierPhys.Rev.D78:032006,2008
dc.identifierdoi:10.1103/PhysRevD.78.032006
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/203731
dc.subjectHigh Energy Physics - Experiment
dc.titleLimits on Low Energy Photon-Photon Scattering from an Experiment on Magnetic Vacuum Birefringence
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