Measurement of the B{sup 0}B(bar sign){sup 0} oscillation frequency using l{sup -}D{sup *+} pairs and lepton flavor tags
- Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
- Waseda University, Tokyo 169, (Japan)
- Rockefeller University, New York, New York 10021 (United States)
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States)
- Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637 (United States)
- Istituto Nazionale di Fisica Nucleare, University and Scuola Normale Superiore of Pisa, I-56100 Pisa, (Italy)
- University of Michigan, Ann Arbor, Michigan 48109 (United States)
- Institute of Physics, Academia Sinica, Taipei, Taiwan 11529, Republic of China (China)
The oscillation frequency {delta}m{sub d} of B{sup 0}B(bar sign){sup 0} mixing is measured using the partially reconstructed semileptonic decay B(bar sign){sup 0}{yields}l{sup -}{nu}(bar sign)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(bar sign)p collisions at {radical}(s)=1.8 TeV. We estimate the proper decay time of the B(bar sign){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 B(bar sign){sup 0} meson at its decay. The second lepton in the event is used to infer the flavor of the B(bar sign){sup 0} meson at production. We measure the oscillation frequency to be {delta}m{sub d}=0.516{+-}0.099{sub -0.035}{sup +} {sup 0.029} ps{sup -1}, where the first uncertainty is statistical and the second is systematic. (c) 1999 The American Physical Society.
- OSTI ID:
- 20218034
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 60, Issue 11; Other Information: PBD: 1 Dec 1999; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
Similar Records
Measurement of the $B^0 \overline{B}^0$ oscillation frequency using $\ell^- D^{*+}$ pairs and lepton flavor tags
A Study of Time-Dependent CP-Violating Asymmetries and Flavor Oscillations in Neutral B Decays at the Upsilon(4S)