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

D. Acosta
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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 $μμ$ and $e μ$ 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, $\barχ = 0.152 \pm 0.007$ (stat.) $\pm 0.011$ (syst.), that is significantly larger than the world average $\barχ = 0.118 \pm 0.005$.

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D. Acosta. 2003-09-08. Measurement of the average time-integrated mixing probability of b-flavored hadrons produced at the Tevatron. https://doi.org/10.1103/physrevd.69.012002

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