% IMPORTANT: The following is UTF-8 encoded. This means that in the presence % of non-ASCII characters, it will not work with BibTeX 0.99 or older. % Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or % “biber”. @ARTICLE{Dai:826211, author = {Dai, Lingyun and Pennington, M. R.}, title = {{P}ion polarizabilities from a γ γ → π π analysis}, journal = {Physical review / D}, volume = {94}, number = {11}, issn = {2470-0010}, address = {Woodbury, NY}, publisher = {Inst.}, reportid = {FZJ-2017-00457}, pages = {116021}, year = {2016}, abstract = {We present results for pion polarizabilities predicted using dispersion relations from our earlier amplitude analysis of world data on two photon production of meson pairs. The helicity-zero polarizabilities are rather stable and insensitive to uncertainties in cross-channel exchanges. The need is first to confirm the recent result on (α1−β1) for the charged pion by COMPASS at CERN to an accuracy of $10\%$ by measuring the γγ→π+π− cross section to an uncertainty of $1\%.$ Then the same polarizability, but for π0, is fixed to be (α1−β1)π0=(0.9±0.2)×10−4 fm3. By analyzing the correlation between uncertainties in the meson polarizability and those in γγ cross sections, we suggest experiments need to measure these cross sections between √s≃350 and 600 MeV. The π0π0 cross section then makes the (α2−β2)π0 the easiest helicity-two polarizability to determine.}, cin = {IAS-4 / IKP-3}, ddc = {530}, cid = {I:(DE-Juel1)IAS-4-20090406 / I:(DE-Juel1)IKP-3-20111104}, pnm = {511 - Computational Science and Mathematical Methods (POF3-511) / 531 - Condensed Matter and Molecular Building Blocks (POF3-531)}, pid = {G:(DE-HGF)POF3-511 / G:(DE-HGF)POF3-531}, typ = {PUB:(DE-HGF)16}, UT = {WOS:000391016800012}, doi = {10.1103/PhysRevD.94.116021}, url = {https://juser.fz-juelich.de/record/826211}, }