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http://hdl.handle.net/2445/131407
Title: | Measurement of the η and η′ transition form factors at q2 = 112 GeV2 |
Author: | Graugés Pous, Eugeni BABAR Collaboration |
Keywords: | Física de partícules Experiments Particle physics Experiments |
Issue Date: | 10-Jul-2006 |
Publisher: | American Physical Society |
Abstract: | We report a study of the processes e + e − → η γ and e + e − → η ′ γ 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 + 6 − 5 η γ and 50 + 8 − 7 η ′ γ events over small backgrounds, and measure the cross sections σ ( e + e − → η γ ) = 4.5 + 1.2 − 1.1 ± 0.3 fb and σ ( e + e − → η ′ γ ) = 5.4 ± 0.8 ± 0.3 fb . The corresponding transition form factors at q 2 = 112 GeV 2 are q 2 | F η ( q 2 ) | = 0.229 ± 0.030 ± 0.008 GeV , and q 2 | F η ′ ( q 2 ) | = 0.251 ± 0.019 ± 0.008 GeV , respectively. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.74.012002 |
It is part of: | Physical Review D, 2006, vol. 74, num. 1, p. 012002 |
URI: | http://hdl.handle.net/2445/131407 |
Related resource: | https://doi.org/10.1103/PhysRevD.74.012002 |
ISSN: | 1550-7998 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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