Search for a heavy gauge boson W' in the final state with an electron and large missing transverse energy in pp collisions at sqrt(s) = 7 TeV

TL;DR

This paper reports a search for a hypothetical heavy W' boson decaying into an electron and missing energy in proton-proton collisions at 7 TeV, setting a mass exclusion limit of 1.36 TeV.

Contribution

First search for W' boson in the electron plus missing energy channel at 7 TeV with CMS, establishing new mass exclusion limits.

Findings

No excess observed above standard model background.

Excluded W' boson masses below 1.36 TeV at 95% confidence level.

Set constraints on W' boson properties based on LHC data.

Abstract

A search for a heavy gauge boson W' has been conducted by the CMS experiment at the LHC in the decay channel with an electron and large transverse energy imbalance, using proton-proton collision data corresponding to an integrated luminosity of 36 inverse picobarns. No excess above standard model expectations is seen in the transverse mass distribution of the electron-(missing E_T) system. Assuming standard-model-like couplings and decay branching fractions, a W' boson with a mass less than 1.36 TeV/c^2 is excluded at 95% confidence level.