Abstract
We present a measurement of the Z → bb̄ production cross section in pp collisions at √s = 1.96 TeV . We use a data set of 5.46 fb-1 collected by the CDF experiment at the Tevatron collider during Run II using a dedicated trigger path which required a displaced vertex compatible with a b-hadron decay. A data-driven procedure is applied to estimate the dijet mass spectrum of the non-resonant multijet background. Using a similar strategy we set one of the most stringent upper limits on the production of a Higgs-like particle in association with b quarks. We also set a limit on the inclusive SM H → bb̄.
Highlights
With the Higgs boson discovery at the ATLAS and CMS [1][2] experiments, high-energy physics is in transition: after a long period of search and exploration, an era of consolidation and precise measurements has just started, complementing the direct search for new physics beyond the Standard Model (SM)
We report a search for a narrow neutral scalar particle φ decaying into b-quark jets in events with an additional b-quark jet
Observation of the Z → bbdecay at CDF has been reported and the production cross section times the branching ratio measured with a final value of 1.11 ± 0.08(stat) ± 0.13(sys) nb
Summary
We use a sample of 5.4 fb−1 of data collected by the CDF detector requiring at least one displaced secondary vertex in the event compatible with a b-hadron decay. The evaluation of the bb QCD background using a data-driven technique is presented is Section 2.2.
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