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Measurement of χ2 production in two-photon collisions
- Source :
- Physics Letters B. 540:33-42
- Publication Year :
- 2002
- Publisher :
- Elsevier BV, 2002.
-
Abstract
- The production of the \chi_{c2} charmonium state in two-photon collisions has been measured with the Belle detector at the KEKB e^+e^- collider. A clear signal for \chi_{c2} --> \gamma J/\psi, J/\psi --> l^+l^- is observed in a 32.6fb^{-1} data sample accumulated at center-of-mass energies near 10.6GeV, and the product of its two-photon decay width and branching fraction is determined to be \Gamma_{\gamma\gamma}(\chi_{c2})B(\chi_{c2} --> \gamma J/\psi) B(J/\psi --> l^+l^-)= 13.5 +/- 1.3(stat.) +/- 1.1(syst.)eV.<br />Comment: 16 pages, 5 figures, to be submitted to Phys. Lett. B
Details
- ISSN :
- 03702693
- Volume :
- 540
- Database :
- OpenAIRE
- Journal :
- Physics Letters B
- Accession number :
- edsair.doi.dedup.....ac3a1cba2e242a3a21a88837944d0327