Measurement of the gamma gamma[superscript *]-->eta[subscript c] transition form factor
Name
Lees-2010-Measurement of the γγ→ηc transition form factor.pdf
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Author(s)
Dujmic, Denis
Sciolla, Gabriella
Yamamoto, R. K.
Zhao, M.
Fisher, Peter H
Cowan, Ray F
Alternative Title
Measurement of the γγ*→ηc transition form factor
Date Issued
March 2010
Journal
Physical Review D
Publisher
American Physical Society
Citation
Lees, J. P. et al. “Measurement of the gamma gamma *--> eta [subscript c] transition form factor.” Physical Review D 81.5 (2010): 052010. © 2010 The American Physical Society.
Version
Final published version
Abstract
We study the reaction e+e- -->e+e-eta c, eta c-->KSK±pi∓ and obtain eta c mass and width values 2982.2±0.4±1.6 MeV/c2 and 31.7±1.2±0.8 MeV, respectively. We find Γ(eta c-->γγ)B(eta c-->KK[over-bar]pi)=0.374±0.009±0.031 keV, and measure the γγ*-->eta c transition form factor in the momentum transfer range from 2 to 50 GeV[superscript 2]. The analysis is based on 469 fb[superscript -1] of integrated luminosity collected at PEP-II with the BABAR detector at e+e- center-of-mass energies near 10.6 GeV.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.81.052010
