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ADEVA 1990R

L3 collaboration; Adeva, B. et al.
A Measurement of B^{o o} Mixing in Z^o Decays
Phys. Lett. 252B (1990) 703;

Abstracts
We have observed B^{o o} mixing in Z⁰ b decays using hadronic events containing dileptons. The data sample corresponds to 118200 hadron events at = M_Z. From a fit to the dilepton p and p_bot spectra, we determine the mixing parameter to be _B = 0.178^+0.049_-0.040.

Accelerator CERN-LEP Detectors L3

Related references
More (earlier) information appears in
L3 Collab., B. Adeva et al., Phys. Lett. 241B (1990) 416;

Experiment comments
Total integrated luminosity 5.5 pb^-1.

Reactions

	e+ e– e– e+ X	88.2-94.2 GeV (Ecm)	p, pt
	e+ e– – + X	88.2-94.2 GeV (Ecm)	p, pt
	e+ e– 2+ X	88.2-94.2 GeV (Ecm)	p, pt
	e+ e– 2e+ X	88.2-94.2 GeV (Ecm)	p, pt
	e+ e– 2e– X	88.2-94.2 GeV (Ecm)	p, pt
	e+ e– 2– X	88.2-94.2 GeV (Ecm)	p, pt
	e+ e– + e– X	88.2-94.2 GeV (Ecm)	p, pt
	e+ e– – e+ X	88.2-94.2 GeV (Ecm)	p, pt
	e+ e– + e+ X	88.2-94.2 GeV (Ecm)	p, pt
	e+ e– – e– X	88.2-94.2 GeV (Ecm)	p, pt
	e+ e– Zo	88.2-94.2 GeV (Ecm)
	Zo Bo o
	Zo Bs s
	Bo o		amp, qnc, const
	Bs s		amp, qnc, const
	o Bo		amp, qnc, const
	s Bs		amp, qnc, const
	Bo + X
	Bo e+ X
	Bs + X
	Bs e+ X

Particles studied

	Bo	pw
	o	pw
	Bs	pw
	s	pw

Record comments
Another confirmation of B_s-_s mixing.

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