Measurement of the rate of b anti-b b anti-b events in hadronic Z decays and the extraction of the gluon splitting into b anti-b

Abreu, P.;Cortina Gil, Eduardo;DELPHI Collaboration;et.al.
(1999) Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics — Vol. 462, n° 3-4, p. 425-439 (1999)

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The rate View the MathML source was measured using about 2×106 hadronic decays collected by the DELPHI experiment in 1994 and 1995. Events were forced into 3-jets with ymin>0.06 and a b-tag was required for every jet. The rate was measured to be: View the MathML source where the invariant mass of every View the MathML source system is above twice the b quark mass. Using the value of R4b the probability of secondary production of a View the MathML source pair from a gluon per hadronic Z decay, gbb, was extracted and found to be: gbb=(3.3±1.0(stat.)±0.8(syst.))×10−3.
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Abreu, P., Cortina Gil, E., DELPHI Collaboration, & et al. (1999). Measurement of the rate of b anti-b b anti-b events in hadronic Z decays and the extraction of the gluon splitting into b anti-b. Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, 462(3-4), 425-439. https://doi.org/10.1016/S0370-2693(99)00905-3 (Original work published 1999)