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ARTUSO 1989C

CLEO collaboration; Artuso, M. et al.
B^o anti-B^o Mixing at the Υ(4S)
Phys. Rev. Lett. 62 (1989) 2233;

Abstracts
We have measured B^o anti-B^o mixing by observing like-sign dilepton events in Υ(4S) decay. Assuming that the semileptonic branching fraction of the charged and neutral B mesons are equal and that the Υ(4S) decays to B⁺ B^– 55% of the time and to B^o anti-B^o 45% of the time, we measure the mixing parameter r to be 0. 19 ± 0.06 ± 0.06, where the first error is statistical and the second is systematic.

Accelerator CESR Detectors CLEO

Related references
See also
ARGUS Coll., H. Albrecht et al., Phys. Lett. 162B (1985) 395;
ARGUS Coll., H. Albrecht et al., Phys. Lett. 192B (1987) 245;
CLEO Coll., A. Bean et al., Phys. Rev. Lett. 58 (1987) 183;
I. I. Bigi and A. I. Sanda, Phys. Rev. D29 (1984) 1393;
Particle Data Group, Review of Particle Properties, G. P. Yost et al., Phys. Lett. 204B (1988) 1;
D. Andrews et al., Nucl. Instr. and Meth. 211 (1983) 47;
G. Altarelli et al., Nucl. Phys. B208 (1982) 365;
P. Haas et al., Phys. Rev. Lett. 55 (1985) 1248;
C. Bebek et al., Phys. Rev. D36 (1987) 1289;
K. Chadwick et al., Phys. Rev. D27 (1983) 475;

Reactions

	e+ e– Υ(4S)	10.58 GeV (Ecm)
	Υ(4S) Bo anti-Bo
	Υ(4S) B+ B–
	B l+ ν X
	anti-B l– ν X
	Bo anti-Bo

Particles studied

	Bo	mass
	anti-Bo	mass

Record comments
Confirmation of B^o- anti-B^o mixing.

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