Search for Heavy Bottomlike Quarks Decaying to an Electron or Muon and Jets in pp̅ Collisions at √s=1.96 TeV
Author(s)Bauer, Gerry P.; Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Makhoul, Khaldoun; Paus, Christoph M. E.
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We report the most sensitive direct search for pair production of fourth-generation bottomlike chiral quarks (b′)[(b prime)] 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 pp̅ collisions collected by the CDF II detector at Fermilab with an integrated luminosity of 4.8 fb-1 [fb superscript -1]. We observe events consistent with background expectation, calculate upper limits on the b′ [b prime] pair-production cross section (σbb̅ ′≲30 fb for mb′>375 GeV/c2) [delta subscript b b overstrike prime ≲ 30 fb for m subscript b prime > 375 GeV / c superscript 2)], and exclude mb′<372 GeV/c2 [m subscript b prime < 372 GeV / c superscript 2] at 95% confidence level assuming a 100% branching ratio of b′ [b prime] to tW.
DepartmentMassachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
Physical review letters
American Physical Society
aaltonen, T. et al. "Search for Heavy Bottomlike Quarks Decaying to an Electron or Muon and Jets in pp̅ Collisions at √s=1.96 [square root = 1.96] TeV" Phys. Rev. Lett. v.106, 141803 (2011) © 2011 American Physical Society
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