Photon-photon scattering, pion polarizability, and chiral symmetry
نویسندگان
چکیده
منابع مشابه
Photon-photon scattering, pion polarizability, and chiral symmetry.
Recent attempts to detect the pion polarizability via analysis of γγ → ππ measurements are examined. The connection between calculations based on dispersion relations and on chiral perturbation theory is established by matching the low energy chiral amplitude with that given by a full dispersive treatment. Using the values for the polarizability required by chiral symmetry, predicted and experi...
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Hadronic interactions of two quasi-real photons have been studied extensively both during the LEP1 and the LEP2 data taking periods. The higher energies available at LEP2 in particular opened regions of phase space where hadronic processes can be predicted reliably by perturbative QCD calculations, usually available to next-to-leading order in the strong coupling constant for the process concer...
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Kevin T. Engel, Hiren H. Patel, and Michael J. Ramsey-Musolf California Institute of Technology, Pasadena, California 91125, USA Department of Physics, University of Wisconsin, Madison, Wisconsin 53706, USA Department of Physics, University of Wisconsin, Madison, Wisconsin 53706, USA and Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, California 91125, USA (Received ...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 1993
ISSN: 0556-2821
DOI: 10.1103/physrevd.48.137