Measurement of the average time-integrated mixing probability of b-flavored hadrons produced at the Tevatron

Details Measurement of the average time-integrated mixing probability of b-flavored hadrons produced at the Tevatron Measurement of the average time-integrated mixing probability of b-flavored hadrons produced at the Tevatron

2003-09-08

arxiv.org/abs/hep-ex/0309030v1

Phys.Rev.D69:012002,2004

Physics

High Energy Physics

High Energy Physics - Experiment

47 pages, 10 figures, 15 tables Submitted to Phys. Rev. D

Scientific paper

10.1103/PhysRevD.69.012002

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 $\bar{\chi} = 0.118 \pm 0.005$.

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