Measurement of the B{sup degree}{ovr B}{sup degree} oscillation frequency using l{sup -}D{sup *+} pairs and lepton flavor tags.
The oscillation frequency {Delta}m{sub d} of B{sup 0}{ovr B}{sup 0} mixing is measured using the partially reconstructed semileptonic decay {ovr B}{sup 0} {yields} l{sup -}{ovr v}D{sup *+}X. The data sample was collected with the CDF detector at the Fermilab Tevatron collider during 1992 - 1995 by triggering on the existence of two lepton candidates in an event, and corresponds to about 110 pb{sup -1} of p{ovr p} collisions at {radical}s = 1.8 TeV. We estimate the proper decay time of the {ovr B}{sup 0} meson from the measured decay length and reconstructed momentum of the l{sup -}D{sup *+} system. The charge of the lepton in the final state identifies the flavor of the {ovr B}{sup 0} meson at its decay. The second lepton in the event is used to infer the flavor of the {ovr B}{sup 0} meson at production. We measure the oscillation frequency to be {Delta}m{sub d} = 0.516 {+-} 0.099{sub -0.035}{sup +0.029}ps{sup -1}, where the first uncertainty is statistical and the second is systematic.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- National Science Foundation (NSF)
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 942863
- Report Number(s):
- ANL-HEP-PR-00-18; TRN: US0904484
- Journal Information:
- Phys. Rev. D, Vol. 60, Issue 112004 ; Dec. 1, 1999; ISSN 1550-7998
- Country of Publication:
- United States
- Language:
- ENGLISH
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