The B0B0BAR average mixing parameter-chi has been extracted from e-mu and ee events produced in ppBAR collisions at square-root = 1.8 TeV. In a sample of 900 e-mu-events, the like-sign to opposite-sign charge ratio R is measured to be 0.556 +/- 0.048(stat)-0.042(+0.05)(syst). In the absence of mixing, the expected value of R would be 0.23 + 0.06. The corresponding number for 212 ee events is 0.573 +/- 0.116(stat) +/- 0.047(syst) with an expected nonmixing value of 0.24 +/- 0.07. The observed excess in R leads to a combined determination of chi = 0.176 +/- 0.031 (stat + syst) +/- 0.032(model), where the last uncertainty is due to Monte Carlo modeling.

F., A., D., A., G., A., M., A., P., A., A. R., B., et al. (1991). Measurement of B0bbar0 Mixing At the Fermilab Tevatron Collider. PHYSICAL REVIEW LETTERS, 67(24), 3351-3355 [10.1103/PhysRevLett.67.3351].

Measurement of B0bbar0 Mixing At the Fermilab Tevatron Collider

PAOLETTI, RICCARDO;TURINI, NICOLA;
1991-01-01

Abstract

The B0B0BAR average mixing parameter-chi has been extracted from e-mu and ee events produced in ppBAR collisions at square-root = 1.8 TeV. In a sample of 900 e-mu-events, the like-sign to opposite-sign charge ratio R is measured to be 0.556 +/- 0.048(stat)-0.042(+0.05)(syst). In the absence of mixing, the expected value of R would be 0.23 + 0.06. The corresponding number for 212 ee events is 0.573 +/- 0.116(stat) +/- 0.047(syst) with an expected nonmixing value of 0.24 +/- 0.07. The observed excess in R leads to a combined determination of chi = 0.176 +/- 0.031 (stat + syst) +/- 0.032(model), where the last uncertainty is due to Monte Carlo modeling.
1991
F., A., D., A., G., A., M., A., P., A., A. R., B., et al. (1991). Measurement of B0bbar0 Mixing At the Fermilab Tevatron Collider. PHYSICAL REVIEW LETTERS, 67(24), 3351-3355 [10.1103/PhysRevLett.67.3351].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11365/41068
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