Measurement of the $B^0 \overline{B}^0$ oscillation frequency using $\ell^- D^{*+}$ pairs and lepton flavor tags

Affolder, T.

doi:10.1103/PhysRevD.60.112004

Measurement of the $$B^0 \overline{B}^0$$ oscillation frequency using $$\ell^- D^{*+}$$ pairs and lepton flavor tags

Journal Article · Thu Jul 01 04:00:00 EDT 1999 · Phys.Rev.D

DOI:https://doi.org/10.1103/PhysRevD.60.112004· OSTI ID:1893487

Affolder, T.

The oscillation frequency Delta-md of B0 anti-B0 mixing is measured using the partially reconstructed semileptonic decay anti-B0 -> l- nubar D*+ 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-1 of pbar p collisions at sqrt(s) = 1.8 TeV. We estimate the proper decay time of the anti-B0 meson from the measured decay length and reconstructed momentum of the l- D*+ system. The charge of the lepton in the final state identifies the flavor of the anti-B0 meson at its decay. The second lepton in the event is used to infer the flavor of the anti-B0 meson at production. We measure the oscillation frequency to be Delta-md = 0.516 +/- 0.099 +0.029 -0.035 ps-1, where the first uncertainty is statistical and the second is systematic.

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Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)

Contributing Organization:: CDF

DOE Contract Number:: AC02-07CH11359

OSTI ID:: 1893487

Report Number(s):: FERMILAB-PUB-99-210-E; CDF-PUB-BOTTOM-PUBLIC-4966; arXiv:hep-ex/9907053; oai:inspirehep.net:504668

Journal Information:: Phys.Rev.D, Journal Name: Phys.Rev.D Vol. 60

Country of Publication:: United States

Language:: English

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