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

Abstract

We report the most sensitive direct search for pair production of fourth-generation bottom-like 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 indentified as due to a b or c quark) and an imbalance of transverse momentum using data from p？ collisions collected by the CDF II detector at Fermilab with an