Cargando…
Measurement of the open beauty and charm production cross sections in two photon collisions with DELPHI
Heavy b and c quark production in gamma gamma collisions has been measured through semileptonic decays with the DELPHI detector at LEP. The 413 p/sup -1/1 data were collected at center-of-mass energies from 189 GeV to 209 GeV. The corresponding extracted cross sections sigma (e/sup +/e/sup -/ to e/s...
| Autor principal: | |
|---|---|
| Lenguaje: | eng |
| Publicado: |
2004
|
| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1016/j.nuclphysbps.2003.11.031 http://cds.cern.ch/record/816666 |
| Sumario: | Heavy b and c quark production in gamma gamma collisions has been measured through semileptonic decays with the DELPHI detector at LEP. The 413 p/sup -1/1 data were collected at center-of-mass energies from 189 GeV to 209 GeV. The corresponding extracted cross sections sigma (e/sup +/e/sup -/ to e/sup +/e/sup -/bbX) and sigma (e/sup +/e- to e/sup +/e/sup -/ccX) are compared to NLO perturbative QCD calculations. The cross section for b production is found to exceed QCD predictions by a factor of about 3. K-lepton double tagging, used for the first time in gamma gamma physics, confirms this excess. (16 refs). |
|---|