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A Measurement of the Ratio of Inclusive Cross Sections $\sigma(p\bar{p}\rightarrow Z+b{\rm\, jet})/ \sigma(p\bar{p}\rightarrow Z+{\rm jet})$ at $\sqrt{s}=1.96$ TeV
Stockholm University, Faculty of Science, Department of Physics. (Elementarpartikelfysik)
2011 (English)In: Physical Review D, ISSN 1550-7998, Vol. 83, 031105- p.Article in journal (Refereed) Published
Abstract [en]

The ratio of the cross section for pp̅ interactions producing a Z boson and at least one b-quark jet to the inclusive Z+jet cross section is measured using 4.2  fb-1 of pp̅ collisions collected with the D0 detector at the Fermilab Tevatron collider at √s=1.96  TeV. The Z→ℓ+- candidate events with at least one b jet are discriminated from Z+charm and light jet(s) events by a novel technique that exploits the properties of the tracks associated to the jet. The measured ratio is 0.0193±0.0027 for events having a jet with transverse momentum pT>20  GeV and pseudorapidity |η|≤2.5, which is the most precise to date and is consistent with theoretical predictions.

Place, publisher, year, edition, pages
2011. Vol. 83, 031105- p.
National Category
Subatomic Physics
Research subject
URN: urn:nbn:se:su:diva-62698DOI: 10.1103/PhysRevD.83.031105ISI: 000287797900001OAI: diva2:444003
Swedish Research Council

authorCount :412

Available from: 2011-09-27 Created: 2011-09-27 Last updated: 2012-12-05Bibliographically approved

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Åsman, Barbro
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