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Measurements of the γγ* → π^0 and γγ* → ηc transition form factors at BABAR
作者姓名:V.  P.  Druzhinin
作者单位:Budker Institute of Nuclear Physics, Novosibirsk 630090, Russia
摘    要:We present measurements of the γγ* → π^0 transition form factor for the momentum transfer range Q^2=4-40 GeV^2 and the γγ* → ηc transition form factor for the range Q^2=2-50 GeV^2. The current status of measurements of the meson-photon transition form factors for the η and η' mesons is discussed. The results of the measurement of the ηc mass, total and two-photon widths are also presented.

关 键 词:外形尺寸  π  宽度测量  双光子  amp  介子  因数
收稿时间:2010-1-26
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