Measurement of the correlated b-bbar production in p-pbar collisions at 1960 GeV

We present a measurement of the correlated bb production cross section. The data used in this analysis were taken with the upgraded CDF (CDF II) detector at the Fermilab Tevatron collider, and correspond to an integrated luminosity of 742 pb-1. We utilize muon pairs with invariant mass 5 &le m&mu&mu &le 80 GeV/c2 produced by bb double semileptonic decays. For muons with pT &ge 3 GeV/c and |&eta| &le 0.7, which in turn are produced by b and b quarks with pT &ge 2 GeV/c and |y| &le 1.3, we measure &sigmab&rarr&mu, b&rarr&mu = 1549 ± 133 pb. We compare this result with theoretical predictions and previous measurements. We also report the measurement of &sigmac&rarr&mu, c&rarr&mu, a by-product of the study of the background to bb production.

The results have been approved as of May 24, 2007.

A more detailed summary of the results can be found here: ps , pdf .

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