Search for heavy bottom-like quarks decaying to an electron or muon and jets at CDF
D. Whiteson1, T. Schwarz2, A. Ivanov3
A. Lister4, R. Erbacher2, J. Conway2
1 University of California, Irvine
2 University of California, Davis
3 Kansas State
4 Geneva
for the CDF Collaboration
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Abstract
We present a search for pair production of a heavy bottom-like fourth-generati
on quark
$b'$ decaying via $b'\rightarrow Wt\rightarrow WWb$ in the
lepton+jets channel.
We construct a variable "Jet-HT", defined as
- Jet-HT = HT, if Njets=5
- Jet-HT = HT+1000, if Njets=6
- Jet-HT = HT+2000, if Njets=7 or more
which is sensitive to the large-HT and large jet multiplicity of our signal. We perform a template fit to the data.
We observe events consistent with
background expectation and exclude
m<372 GeV at 95% CL
Jet-HT plot
Jet multiplicity
Limit plot