Search for W´ → tb decays in the lepton + jets final state in pp collisions at √s = 8TeV

Authors

S. Chatrchyan, Yerevan Physics Institute
Ekaterina Avdeeva, University of Nebraska-LincolnFollow
Kenneth A. Bloom, University of Nebraska - LincolnFollow
S. Bose, University of Nebraska-LincolnFollow
Daniel R. Claes, University of Nebraska-LincolnFollow
Aaron Dominguez, University of Nebraska-LincolnFollow
Rebeca Gonzalez Suarez, University of Nebraska-LincolnFollow
J. Keller, University of Nebraska-LincolnFollow
D. Knowlton, University of Nebraska-LincolnFollow
Ilya Kravchenko, University of Nebraska-LincolnFollow
J. Lazo-Flores, University of Nebraska-LincolnFollow
S. Malik, University of Nebraska-LincolnFollow
F. Meier, University of Nebraska-LincolnFollow
Gregory R. Snow, University of Nebraska-LincolnFollow
CMS collaboration, CMS collaboration

Date of this Version

5-23-2014

Citation

JHEP05(2014)108; doi:10.1007/JHEP05(2014)108

Comments

Copyright © 2014 CERN, issued under CC license; published by Springer.

Abstract

Results are presented from a search for the production of a heavy gauge boson W` decaying into a top and a bottom quark, using a data set collected by the CMS experiment at √s = 8TeV and corresponding to an integrated luminosity of 19.5 fb<sup>−1</sup>. Various models of W`-boson production are studied by allowing for an arbitrary combination of left- and right-handed couplings. The analysis is based on the detection of events with a lepton (e, μ), jets, and missing transverse energy in the final state. No evidence for W`- boson production is found and 95% confidence level upper limits on the production cross section times branching fraction are obtained. For W` bosons with purely right-handed couplings, and for those with left-handed couplings assuming no interference effects, the observed 95% confidence level limit is M(W`) > 2.05TeV. For W` bosons with purely left-handed couplings, including interference effects, the observed 95% confidence level limit is M(W`) > 1.84TeV. The results presented in this paper are the most stringent limits published to date.