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Search for Heavy Bottomlike Quarks Decaying to an Electron or Muon and Jets in p(p)over-bar Collisions at root s=1.96 TeV

Aaltonen, T; Gonzalez, BA; Amerio, S; Amidei, D; Anastassov, A; Annovi, A; Antos, J; ... CDF Collaboration; + view all (2011) Search for Heavy Bottomlike Quarks Decaying to an Electron or Muon and Jets in p(p)over-bar Collisions at root s=1.96 TeV. PHYS REV LETT , 106 (14) , Article 141803. 10.1103/PhysRevLett.106.141803. Green open access

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Abstract

We report the most sensitive direct search for pair production of fourth-generation bottomlike chiral quarks (b') each decaying promptly to tW. We search for an excess of events with an electron or muon, at least five jets (one identified as due to a b or c quark), and an imbalance of transverse momentum by using data from b (b) over bar collisions collected by the CDF II detector at Fermilab with an integrated luminosity of 4: 8 fb(-1). We observe events consistent with background expectation, calculate upper limits on the b' pair-production cross section (sigma b (b) over bar less than or similar to 30 fb for m(b') > 375 GeV/c(2)), and exclude m(b') < 372 GeV/c(2) at 95% confidence level assuming a 100% branching ratio of b0 to tW.

Type: Article
Title: Search for Heavy Bottomlike Quarks Decaying to an Electron or Muon and Jets in p(p)over-bar Collisions at root s=1.96 TeV
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.106.141803
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.106.141803
Language: English
Additional information: © 2011 American Physical Society
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
URI: https://discovery-pp.ucl.ac.uk/id/eprint/1304461
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