We study the process e+e−→e+e−η′ in the double-tag mode and measure for the first time the γ⋆γ⋆→η′ transition form factor Fη′(Q21,Q22) in the momentum-transfer range 2<Q21, Q22<60 GeV2. The analysis is based on a data sample corresponding to an integrated luminosity of around 469 fb−1 collected at the PEP-II e+e− collider with the BABAR detector at center-of-mass energies near 10.6 GeV.
Measurement of the γ∗γ∗ →η′ transition form factor
Lanceri, L.;Vitale, L.;
2018-01-01
Abstract
We study the process e+e−→e+e−η′ in the double-tag mode and measure for the first time the γ⋆γ⋆→η′ transition form factor Fη′(Q21,Q22) in the momentum-transfer range 2File in questo prodotto:
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