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Observation of double cć production in e+e- annihilation at squareroot[s] approximately 10.6 GeV.
- Source :
-
Physical review letters [Phys Rev Lett] 2002 Sep 30; Vol. 89 (14), pp. 142001. Date of Electronic Publication: 2002 Sep 16. - Publication Year :
- 2002
-
Abstract
- We report the observation of prompt J/psi via double cc; production from the e+e- continuum. In this process one cc; pair fragments into a J/psi meson while the remaining pair either produces a charmonium state or fragments into open charm. Both cases have been experimentally observed. We find cross sections of sigma[e+e- -->J/psieta(c)(gamma)]xB(eta(c)-->>or=4 charged)=(0.033(+0.007)(-0.006)+/-0.009) pb and sigma(e+e- -->J/psiD(*+)X)=(0.53(+0.19)(-0.15)+/-0.14) pb and infer sigma(e+e- -->J/psicc;)/sigma(e+e- -->J/psiX)=0.59(+0.15)(-0.13)+/-0.12. These results are obtained from a 46.2 fb(-1) data sample collected near the Upsilon(4S) resonance, with the Belle detector at the KEKB collider.
Details
- Language :
- English
- ISSN :
- 0031-9007
- Volume :
- 89
- Issue :
- 14
- Database :
- MEDLINE
- Journal :
- Physical review letters
- Publication Type :
- Academic Journal
- Accession number :
- 12366036
- Full Text :
- https://doi.org/10.1103/PhysRevLett.89.142001