Charmed quark component of the photon wave function

A.V. Sarantsev; L.G. Dakhno; V.A. Nikonov; V.N. Markov; V.V. Anisovich

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Charmed quark component of the photon wave function

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arxiv hep-ph/0410361 v1 pith:OGQENWPT submitted 2004-10-27 hep-ph

V.V. Anisovich , L.G. Dakhno , V.N. Markov , V.A. Nikonov , A.V. Sarantsev This is my paper

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keywords gamma-gammawavec-anti-ccomponentfunctionphotonobtainedpartial

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We determine the c-anti-c component of the photon wave function on the basis of (i) the data on the transitions e+ e- -> J/psi(3096), psi(3686), psi(4040), psi(4415), (ii) partial widths of the two-photon decays eta_{c0}(2979), chi_{c0}(3415), chi_{c2}(3556) -> gamma-gamma, and (iii) wave functions of the charmonium states obtained by solving the Bethe-Salpeter equation for the c-anti-c system. Using the obtained c-anti-c component of the photon wave function we calculate the gamma-gamma decay partial widths for radial excitation 2S state, eta_{c0}(3594) -> gamma-gamma, and 2P states chi_{c0}(3849), chi_{c2}(3950) -> gamma-gamma.

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