Abstract
Very general assumptions are used to derive super-convergence type sum rules for elastic γγ scattering. Among the results is a proof that tensor meson decays into two photons must involve predominantly photons with opposite helicities, and estimates for the f → γγ and ɛ → γγ widths. Since these sum rules use full (s, t, u) — crossing, we can also discuss the analytic continuation of the pomeron from {t ≤ O, s large} to {t > O, s ≤ O}. We argue that the pomeron is responsible for the apparent small deviation from ideal mixing in the tensor nonet, in pushing the f meson mass down from its “bare” nonet value, and making its coupling to other states somewhat larger.
Seminar given at XV. Internationale Universitätswochen für Kernphysik,Schladming,Austria,February 16–27,1976.
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Grassberger, P. (1976). Sum Rules for Elastic γγ Scattering? Meson Couplings to Two Photons, and the f-P Relationship. In: Urban, P. (eds) Current Problems in Elementary Particle and Mathematical Physics. Few-Body Systems, vol 15/1976. Springer, Vienna. https://doi.org/10.1007/978-3-7091-8462-2_17
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DOI: https://doi.org/10.1007/978-3-7091-8462-2_17
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