Measurement of $B^0 \overline{B}^0$ mixing at the Fermilab Tevatron collider - INSPIRE

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Measurement of $B^0 \overline{B}^0$ mixing at the Fermilab Tevatron collider

CDF

Collaboration

1991

15 pages

Published in:

Phys.Rev.Lett. 67 (1991) 3351-3355

DOI:

10.1103/PhysRevLett.67.3351

PDG:

\chi _{\mathit b}

Report number:

FERMILAB-PUB-91-201-E,
CDF-PUB-HEAVYFLAVOR-PUBLIC-1442

Experiments:

FNAL-E-0741

View in:

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Abstract: (APS)

The B0 B¯ 0 average mixing parameter χ has been extracted from eμ and ee events produced in pp¯ collisions at √s =1.8 TeV. In a sample of 900 eμ events, the like-sign to opposite-sign charge ratio R is measured to be 0.556±0.048(stat)−0.042+0.035(syst). In the absence of mixing, the expected value of R would be 0.23±0.06. The corresponding number for 212 ee events is 0.573±0.116(stat)±0.047(syst) with an expected nonmixing value of 0.24±0.07. The observed excess in R leads to a combined determination of χ=0.176±0.031(stat+syst) ±0.032 (model), where the last uncertainty is due to Monte Carlo modeling.

colliding beams: anti-p p
anti-p p: inclusive reaction
B: hadroproduction
hadroproduction: B
B: pair production
pair production: B
B0 anti-B0: mixing
B0: semileptonic decay
semileptonic decay: B0
final state: (2electron)

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