Measurement of the eta and eta(') transition form factors at q(2)=112 GeV2

Journal article

We report a study of the processes e+e-→ηγ and e+e-→η′γ at a center-of-mass energy of 10.58 GeV, using a 232fb-1 data sample collected with the BABAR detector at the PEP-II collider at SLAC. We observe 20-5+6ηγ and 50-7+8η′γ events over small backgrounds, and measure the cross sections σ(e+e- →ηγ)=4.5-1.1+1.2±0.3fb and σ(e+e- →η′γ)=5.4±0.8±0.3fb. The corresponding transition form factors at q2=112GeV2 are q2|Fη(q2)|=0.229±0. 030±0.008GeV, and q2|Fη′(q2)|=0.251±0.019±0. 008GeV, respectively. © 2006 The American Physical Society.

Authors: Aubert, B; Barate, R; Bona, M; Boutigny, D; Couderc, F

• Publication status: Published
• Journal: Physical Review D
• Volume: 74
• Issue: 1
• Publication date: 2006-07-01
• DOI: 10.1103/PhysRevD.74.012002
• EISSN: 1550-2368
• ISSN: 1550-7998
• Language: English