Search for down-type fourth generation quarks with the ATLAS detector in events with one lepton and hadronically decaying $W$ bosons
Journal
Physical Review Letters
Journal Volume
109
Pages
032001
Date Issued
2012
Author(s)
Aad, Georges
Abstract
This Letter presents a search for pair production of heavy down-type quarks decaying via b′→Wt in the lepton+jets channel, as b ′b̄′→W-tW +t̄→bb̄W+W-W+W -→l±νbb̄qq̄qq̄qq̄. In addition to requiring exactly one lepton, large missing transverse momentum, and at least six jets, the invariant mass of nearby jet pairs is used to identify high transverse momentum W bosons. In data corresponding to an integrated luminosity of 1.04fb-1 from pp collisions at √s=7TeV recorded with the ATLAS detector, a heavy down-type quark with mass less than 480GeV can be excluded at the 95% confidence level. © 2012 CERN. Published by the American Physical Society.
Type
journal article