The data collected during 1990 and 1991 LEP runs with the DELPHI detector have been analyzed to measure the probability [chi] for a [ital B] meson to undergo mixing before decay. A study based on events containing two identified leptons lying on opposite detector sides yielded [chi]=0.121[plus minus][sub 0.040][sup 0.044](stat.)[plus minus]0.017(syst.); a comparison between the charge of a high [ital p][sub [ital t]] muon and the one of the jet recoiling in the opposite direction gave [chi]=0.075[plus minus]0.053 (stat. [direct sum] syst.); the combined result is [chi]=0.101[plus minus]0.035 (stat. [direct sum] syst.). No signal of CP violation has been observed.
A measurement of B bar{B} mixing with the DELPHI detector at LEP
SIMONETTO, FRANCO
1993
Abstract
The data collected during 1990 and 1991 LEP runs with the DELPHI detector have been analyzed to measure the probability [chi] for a [ital B] meson to undergo mixing before decay. A study based on events containing two identified leptons lying on opposite detector sides yielded [chi]=0.121[plus minus][sub 0.040][sup 0.044](stat.)[plus minus]0.017(syst.); a comparison between the charge of a high [ital p][sub [ital t]] muon and the one of the jet recoiling in the opposite direction gave [chi]=0.075[plus minus]0.053 (stat. [direct sum] syst.); the combined result is [chi]=0.101[plus minus]0.035 (stat. [direct sum] syst.). No signal of CP violation has been observed.
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