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Search for a Fourth Generation $t^\prime$ Quark in $p\bar{p}$ Collisions at $\sqrt{s}=1.96$ TeV
Stockholm University, Faculty of Science, Department of Physics.
2011 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 107, no 8, 082001- p.Article in journal (Refereed) Published
Abstract [en]

We present a search for pair production of a fourth generation t' quark and its antiparticle, followed by their decays to a W boson and a jet, based on an integrated luminosity of 5: 3 fb(-1) of proton-antiproton collisions at root s = 1.96 TeV collected by the D0 Collaboration at the Fermilab Tevatron Collider. We set upper limits on the t'(t) over bar' production cross section that exclude at the 95% C. L. a t' quark that decays exclusively to W + jet with a mass below 285 GeV. We observe a small excess in the mu + jets channel which reduces the mass range excluded compared to the expected limit of 320 GeV in the absence of a signal.

Place, publisher, year, edition, pages
2011. Vol. 107, no 8, 082001- p.
National Category
Subatomic Physics
Research subject
URN: urn:nbn:se:su:diva-63095DOI: 10.1103/PhysRevLett.107.082001ISI: 000293921000006OAI: diva2:446682
Swedish Research Council
Publikationen har totalt 421 författare, V. Abazov et al.Available from: 2011-10-08 Created: 2011-10-08 Last updated: 2012-01-26Bibliographically approved

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