Recent Results on Two-photon Physics at BABAR

By V. Druzhinin. 2009

167 citations recorded by the source corpus.

Recent BABAR results on two-photon processes are presented. A high statistics study of the twophoton production of the charmonium states ηc and ηc(2S) is performed. The mass and width of ηc and ηc(2S) are measured; the ratio of the decay probabilities to KSK + π − and K + K − π + π − π 0 are determined. The latter mode is studied for the first time. The reactions e + e − → e + e − γ ∗ γ ∗ → e + e − + pseudoscalar meson are studied in the single-tag mode for π 0 , η, η ′ , and ηc. From the measured differential cross sections the Q 2 dependencies of the photon-meson transition form factors are extracted. From these measurements we conclude that the pion distribution amplitude strongly differs from the distribution amplitudes of η and η ′ mesons.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/832fa95ecb606ba3b9104e3495ea435cdf979601

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In Nuclear and High Energy Physics

1. Marcos Mariño
2. C. Vafa
3. B. Eynard
4. Phil Saad
5. A. Klemm
6. M. Unsal
7. Sanefumi Moriyama
8. Mina Aganagic

Citations in the corpus

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