We study the reaction e+e-→e+e -ηc, ηc→KSK±π" ; obtain ηc mass ; width values 2982.2±0.4±1.6MeV/c2 ; 31.7±1.2±0.8MeV, respectively. We find Γ(ηc→γ γ)B(ηc→KK̄π)=0.374±0.009±0.031keV, ; measure the γγ*→ηc transition form factor in the momentum transfer range from 2 to 50GeV2. The analysis is based on 469fb-1 of integrated luminosity collected at PEP-II with the BABAR detector at e+e- center-of-mass energies near 10.6 GeV. © 2010 The American Physical Society.

Measurement of the γγ*→ηc transition form factor

PALANO, Antimo;PAPPAGALLO, MARCO IGNAZIO;
2010-01-01

Abstract

We study the reaction e+e-→e+e -ηc, ηc→KSK±π" ; obtain ηc mass ; width values 2982.2±0.4±1.6MeV/c2 ; 31.7±1.2±0.8MeV, respectively. We find Γ(ηc→γ γ)B(ηc→KK̄π)=0.374±0.009±0.031keV, ; measure the γγ*→ηc transition form factor in the momentum transfer range from 2 to 50GeV2. The analysis is based on 469fb-1 of integrated luminosity collected at PEP-II with the BABAR detector at e+e- center-of-mass energies near 10.6 GeV. © 2010 The American Physical Society.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11586/179857
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