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DECAMP 1991D
ALEPH collaboration; Decamp, D. et al.
Measurement of B-
Mixing at the Zo
Phys. Lett. 258B (1991) 236;
Abstracts
From more than 175000 hadronic Zo decays observed with the ALEPH detector at LEP, we select 823 events with pairs of leptons in the final state. From these we measure 
, the probability that a b hadron which is observed to decay originated as an anti-b hadron. We find =0.132+0.027-0.026.
Accelerator CERN-LEP Detectors ALEPH
Related references
See also
A. Pais and S. B. Treiman, Phys. Rev. D12 (1975) 2744;
Particle Data Group, Review of Particle Properties, J. J. Hernandez et al., Phys. Lett. 239B (1990) 1;
J. Ellis, M. K. Gaillard, and D. V. Nanopoulos, Nucl. Phys. B109 (1976) 213;
P. J. Franzini, Phys. Rept. 173 (1989) 1;
UA1 Coll., C. Albajar et al., Phys. Lett. 186B (1987) 247;
UA1 Coll., C. Albajar et al., Phys. Lett. 187B (1987) 565(E);
MAC Coll., H. R. Band et al., Phys. Lett. 200B (1988) 221;
MAC Coll., E. Fernandez et al., Phys. Rev. Lett. 50 (1983) 2054;
Mark II Coll., A. J. Weir et al., Phys. Lett. 192B (1987) 289;
Mark II Coll., R. A. Ong et al., Phys. Rev. Lett. 60 (1988) 2587;
ARGUS Coll., H. Albrecht et al., Phys. Lett. 192B (1987) 245;
CLEO Coll., M. Artuso et al., Phys. Rev. Lett. 62 (1989) 2233;
ALEPH Coll., D. Decamp et al., Nucl. Instr. and Meth. A294 (1990) 121;
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JADE Coll., W. Bartel et al., Z. Phys. C33 (1986) 23;
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MARK J Coll., B. Adeva et al., Phys. Rev. Lett. 51 (1983) 443;
CELLO Coll., H. J. Berend et al., Z. Phys. C19 (1983) 291;
TASSO Coll., M. Althoff et al., Z. Phys. C22 (1984) 219;
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TPC Coll., H. Aihara et al., Phys. Rev. D31 (1985) 2719;
TPC Coll., H. Aihara et al., Z. Phys. C27 (1985) 39;
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L. B. Okun', V. I. Zakharov, and B. Pontecorvo, Lett. Nuovo Cim. 15 (1975) 218;
Reactions
e+ e–  Zo
|
91.3 GeV (Ecm) | ||
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Zo 2e+ X
|
p, pt | ||
Zo  + e+ X
|
p, pt | ||
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Zo 2+ X
|
p, pt | ||
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Zo 2e– X
|
p, pt | ||
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Zo – e– X
|
p, pt | ||
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Zo 2– X
|
p, pt | ||
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Zo e– e+ X
|
p, pt | ||
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Zo – e+ X
|
p, pt | ||
|
Zo + e– X
|
p, pt | ||
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Zo – + X
|
p, pt | ||
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Zo 2jet
|
p, pt | ||
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Zo 2l+ X
|
p, pt | ||
|
Zo 2l– X
|
p, pt | ||
|
Zo l+ l– X
|
p, pt | ||
Zo  b
|
qnc | ||
|
Zo 2bottom
|
qnc | ||
Zo 2
|
qnc | ||
|
Bo o
|
amp, qnc, const | ||
|
Bs s
|
amp, qnc, const | ||
|
o Bo
|
amp, qnc, const | ||
|
s Bs
|
amp, qnc, const | ||
|
bottom
|
amp, qnc, const | ||
|
bottom
|
amp, qnc, const |
