We report on a new measurement of B0-BBAR0 mixing at the CERN SppBARS Collider. Mixing is measured in the non-isolated high mass dimuon sample using data from the 1988-1989 collider runs. The measured value of the mixing parameter, chi, is 0.145 +/- 0.035(stat.) +/- 0.014(syst.). The average of this measurement and that from our 1984-1985 data is chi = 0.148 +/- 0.029(stat.) +/- 0.017(syst.) assuming fully correlated systematic errors. Using the measurement of chi-d from ARGUS and CLEO, we obtain chi-s = 0.50 +/- 0.20, which gives a limit of chi-s > 0.17 (0.12) at 90% (95%) CL. Including the measurements of chi from the ALEPH and L3 experiments gives chi-s = 0.53 +/- 0.15, and a limit of chi-s > 0.27 (0.23) at 90% (95%) CL.
Measurement of B0-bbar0 Mixing At the Cern Sppbars Collider
BETTINI, ALESSANDRO;BUSETTO, GIOVANNI;CENTRO, SANDRO;MENEGUZZO, ANNA TERESA;ZOTTO, PIERLUIGI
1991
Abstract
We report on a new measurement of B0-BBAR0 mixing at the CERN SppBARS Collider. Mixing is measured in the non-isolated high mass dimuon sample using data from the 1988-1989 collider runs. The measured value of the mixing parameter, chi, is 0.145 +/- 0.035(stat.) +/- 0.014(syst.). The average of this measurement and that from our 1984-1985 data is chi = 0.148 +/- 0.029(stat.) +/- 0.017(syst.) assuming fully correlated systematic errors. Using the measurement of chi-d from ARGUS and CLEO, we obtain chi-s = 0.50 +/- 0.20, which gives a limit of chi-s > 0.17 (0.12) at 90% (95%) CL. Including the measurements of chi from the ALEPH and L3 experiments gives chi-s = 0.53 +/- 0.15, and a limit of chi-s > 0.27 (0.23) at 90% (95%) CL.Pubblicazioni consigliate
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