Research Papers in Physics and Astronomy


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Published by American Physical Society. Phys. Rev. Lett. 82, 3576 (1999). Copyright © 1999 American Physical Society. Permission to use.


A search for Bs0-B̅s0 oscillations is performed in a sample of Bs0 semileptonic decays collected using dilepton triggers at the Tevatron Collider during 1992–1995. The Bs0 is reconstructed using φ mesonlepton correlations; its initial production flavor is determined with the second lepton in the event. From a signal of 1068 with a Bs0 purity of 61%, we obtain a limit on the Bs0-B̅s0 oscillation frequency of Δms>5.8 ps-1 at 95% confidence level.

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