Two Simple W' Models for the Early LHC

TL;DR

This paper introduces two simplified models for W' gauge bosons, analyzes their current experimental constraints, and identifies promising channels for early LHC discovery, especially for the W'_R model.

Contribution

It defines two reference models for W' searches at the LHC, providing a framework for experimental analysis and highlighting discovery prospects beyond existing bounds.

Findings

W'_R can be discovered with 50 pb^-1 at the LHC in certain parameter regions.

Indirect constraints are strong for W'_L, but less so for W'_R.

Promising signals include two leptons and two jets, or a lepton with a neutrino jet.

Abstract

W' gauge bosons are good candidates for early LHC discovery. We define two reference models, one containing a W'_R and one containing a W'_L, which may serve as ``simplified models'' for presenting experimental results of W' searches at the LHC. We present the Tevatron bounds on each model and compute the constraints from precision electroweak observables. We find that indirect low-energy constraints on the W'_L are quite strong. However, for a W'_R coupling to right-handed fermions there exists a sizeable region in parameter space beyond the bounds from the Tevatron and low-energy precision measurements where even 50 inverse picobarns of integrated LHC luminosity are sufficient to discover the W'_R. The most promising final states are two leptons and two jets, or one lepton recoiling against a ``neutrino jet''. A neutrino jet is a collimated object consisting of a hard lepton and two jets arising from the decay of a highly boosted massive neutrino.