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

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BaBar Collaborat (Including:

Aubert, B., Barate, R., Bona, M., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J. P., Poireau, V., Tisserand, V., Zghiche, A. et al.
). (2006) Measurement of the eta and eta(') transition form factors at q(2)=112 GeV2. PHYSICAL REVIEW D, 74 (1). -. ISSN 1550-7998

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Abstract

We report a study of the processes e(+)e(-)->eta gamma and e(+)e(-)->eta(')gamma at a center-of-mass energy of 10.58 GeV, using a 232 fb(-1) data sample collected with the BABAR detector at the PEP-II collider at SLAC. We observe 20(-5)(+6)eta gamma and 50(-7)(+8)eta(')gamma events over small backgrounds, and measure the cross sections sigma(e(+)e(-)->eta gamma)=4.5(-1.1)(+1.2)+/- 0.3 fb and sigma(e(+)e(-)->eta(')gamma)=5.4 +/- 0.8 +/- 0.3 fb. The corresponding transition form factors at q(2)=112 GeV2 are q(2)vertical bar F-eta(q(2))vertical bar=0.229 +/- 0.030 +/- 0.008 GeV, and q(2)vertical bar F-eta(')(q(2))vertical bar=0.251 +/- 0.019 +/- 0.008 GeV, respectively.

Item Type: Journal Article
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Journal or Publication Title: PHYSICAL REVIEW D
Publisher: AMERICAN PHYSICAL SOC
ISSN: 1550-7998
Date: July 2006
Volume: 74
Number: 1
Number of Pages: 14
Page Range: -
Identification Number: 10.1103/PhysRevD.74.012002
Publication Status: Published
URI: http://wrap.warwick.ac.uk/id/eprint/33210

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