Measurement of the Average Time-Integrated Mixing Probability of $b$-Flavored Hadrons Produced at the Tevatron

Acosta, D.; Affolder, T.; Akimoto, H.; Albrow, M.G.; Ambrose, D.; Amidei, D.; Anikeev, K.; Antos, J.; Apollinari, G.; Arisawa, T.

doi:10.1103/PhysRevD.69.012002

Measurement of the Average Time-Integrated Mixing Probability of $b$ -Flavored Hadrons Produced at the Tevatron

CDF

Collaboration

Sep, 2003

47 pages

Published in:

Phys.Rev.D 69 (2004) 012002

e-Print:

hep-ex/0309030 [hep-ex]

DOI:

10.1103/PhysRevD.69.012002

PDG:

\chi _{\mathit b}

AT HIGH ENERGY

Report number:

FERMILAB-PUB-03-257-E

Experiments:

FNAL-E-0830

View in:

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Abstract:

We have measured the number of like-sign (LS) and opposite-sign (OS) lepton pairs arising from double semileptonic decays of

b

and

\bar{b}

-hadrons, pair-produced at the Fermilab Tevatron collider. The data samples were collected with the Collider Detector at Fermilab (CDF) during the 1992-1995 collider run by triggering on the existence of

\mu \mu

and

e \mu

candidates in an event. The observed ratio of LS to OS dileptons leads to a measurement of the average time-integrated mixing probability of all produced

b

-flavored hadrons which decay weakly,

\bar{\chi} = 0.152 \pm 0.007

(stat.)

\pm 0.011

(syst.), that is significantly larger than the world average

\bar{\chi} = 0.118 \pm 0.005

.

Note:

47 pages, 10 figures, 15 tables Submitted to Phys. Rev. D Report-no: Fermilab-Pub-03/257-E

13.85.Qk
13.20.Jf
anti-p p: colliding beams
anti-p p: inclusive reaction
bottom: pair production
bottom: semileptonic decay
charge: dilepton
B0 anti-B0: mixing
B/s0 anti-B/s0: interference
yield: (beauty charm)

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