Measurement of the γγ*→[eta]c transition form factor
We study the reaction e+e−→e+e−ηc, ηc→KSK±π∓ and obtain ηc mass and width values 2982.2±0.4±1.6 MeV/c2 and 31.7±1.2±0.8 MeV, respectively. We find Γ(ηc→γγ)B(ηc→K¯¯¯¯Kπ)=0.374±0.009±0.031 keV, and measure the γγ∗→ηc transition form factor in the momentum transfer range from 2 to 50 GeV2. The analysis...
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| Hauptverfasser: | , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
30 March 2010
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| In: |
Physical review. D, Particles, fields, gravitation, and cosmology
Year: 2010, Jahrgang: 81, Heft: 5, Pages: 1-18 |
| ISSN: | 1550-2368 |
| DOI: | 10.1103/PhysRevD.81.052010 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevD.81.052010 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.81.052010 |
| Verfasserangaben: | J.P. Lees, A. Adametz, J. Marks, S. Schenk, U. Uwer [und 456 weitere Personen] |
MARC
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| 520 | |a We study the reaction e+e−→e+e−ηc, ηc→KSK±π∓ and obtain ηc mass and width values 2982.2±0.4±1.6 MeV/c2 and 31.7±1.2±0.8 MeV, respectively. We find Γ(ηc→γγ)B(ηc→K¯¯¯¯Kπ)=0.374±0.009±0.031 keV, and measure the γγ∗→ηc transition form factor in the momentum transfer range from 2 to 50 GeV2. The analysis is based on 469 fb−1 of integrated luminosity collected at PEP-II with the BABAR detector at e+e− center-of-mass energies near 10.6 GeV. | ||
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