Study of conversion decays φ→ηe⁺e⁻ and η→γe⁺e⁻ in the experiment with SND detector at VEPP-2M collider

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• 作者：Achasov ; M.N. ; Aulchenko ; V.M. ; Beloborodov ; K.I. ; Berdyugin ; A.V. ; Bogdanchikov ; A.G. ; Bozhenok ; A.V. ; et. al.
• 关键词：13.20.-v ; 13.40.Gp ; e⁺e^&minus ; collisions ; Conversion decay ; Transition form factor
• 刊名：Physics Letters B
• 出版年：2001
• 期刊代码：58_03702693
• 类别：ph
• 出版时间：April 19, 2001
• 卷：504
• 期：4
• 页码：275-281
• 文件大小：159 K

摘要

The conversion decays φ→ηe⁺e^− and η→γe⁺e^− were studied by the SND detector using φ-meson production in e⁺e^−-annihilation at VEPP-2M collider. The branching ratios of these decays were measured: Br(φ→ηe⁺e^−)=(1.19±0.19±0.07)×10^−4 and Br(η→γe⁺e^−)=(5.15±0.62±0.39)×10^−3. The e⁺e^−-pair mass spectra and transition form factors were also studied.