# Search for Heavy Bottomlike Quarks Decaying to an Electron or Muon and Jets in pp̅ Collisions at √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 $p\bar{p}$ 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 and calculate upper limits on the $b'$ pair production cross section ($\sigma_{b\bar{b'}}\lesssim 30$ fb for $m_{b'}>$375 GeV/$c^2$) and exclude $m_{b'}<372$ \gevcc at 95% confidence level.
Document type :
Journal articles
Domain :

http://hal.in2p3.fr/in2p3-00561646
Contributor : Swarna Bassava <>
Submitted on : Tuesday, February 1, 2011 - 4:02:52 PM
Last modification on : Monday, December 14, 2020 - 9:44:23 AM

### Citation

T. Aaltonen, B. Alvarez Gonzalez, S. Amerio, D. Amidei, A. Anastassov, et al.. Search for Heavy Bottomlike Quarks Decaying to an Electron or Muon and Jets in pp̅ Collisions at √s=1.96 TeV. Physical Review Letters, American Physical Society, 2011, 106, pp.141803. ⟨10.1103/PhysRevLett.106.141803⟩. ⟨in2p3-00561646⟩

Record views