Measurement of B{sup 0}-{bar B}{sup 0} flavor oscillations using jet-charge and lepton flavor tagging in p{bar p} collisions at {radical} (s) =1.8 TeV
Journal Article
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· Physical Review, D
OSTI ID:698885
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- Argonne National Laboratory, Argonne, Illinois 60439 (United States)
- Istituto Nazionale di Fisica Nucleare, University of Bologna, I-40127 Bologna (Italy)
- Brandeis University, Waltham, Massachusetts 02254 (United States)
- University of California at Los Angeles, Los Angeles, California 90024 (United States)
- University of Chicago, Chicago, Illinois 60637 (United States)
- Duke University, Durham, North Carolina 27708 (United States)
- Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States)
- University of Florida, Gainesville, Florida 32611 (United States)
- Laboratori Nazionali di Frascati, Istituto Nazionale di Fisica Nucleare, I-00044 Frascati (Italy)
- University of Geneva, CH-1211 Geneva 4 (Switzerland)
We present a measurement of the mass difference {Delta}m{sub d} for the B{sup 0} meson and the statistical power of the {ital b} flavor tagging methods used. The measurement uses 90 pb{sup {minus}1} of data from p{bar p} collisions at {radical} (s) =1.8 TeV collected with the CDF detector. An inclusive lepton trigger is used to collect a large sample of {ital B} hadron semileptonic decays. The mass difference {Delta}m{sub d} is determined from the proper time dependence of the fraction of {ital B} hadrons that undergo flavor oscillations. The flavor at decay is inferred from the charge of the lepton from semileptonic {ital B} decay. The initial flavor is inferred by determining the flavor of the other {ital B} hadron produced in the collision, either from its semileptonic decay (soft-lepton tag) or from its jet charge. The measurement yields {Delta}m{sub d}=(0.500{plus_minus}0.052{plus_minus}0.043){h_bar} ps{sup {minus}1}, where the first uncertainty is statistical and the second uncertainty is systematic. The statistical powers ({epsilon}D{sup 2}) of the soft-lepton and jet-charge flavor taggers are (0.91{plus_minus}0.10{plus_minus}0.11){percent} and (0.78{plus_minus}0.12{plus_minus}0.08){percent}, respectively. {copyright} {ital 1999} {ital The American Physical Society}
- OSTI ID:
- 698885
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 7 Vol. 60; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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