Abstract
The large cross section for tbar{t} production at the large hadron collider (LHC) and at any future hadron collider provides a high-statistics and relatively clean environment for a study of W boson properties: after tagging on a leptonic decay of one of the Ws and the two b jets, an additional W still remains in the event. We study the prospect of making the first exclusive hadronic decay of a fundamental boson of the standard model, using the decay modes Wrightarrow pi gamma and W rightarrow pi pi pi , and other related decays. By using strong isolation criteria, which we impose by searching for jets with a single particle constituent, we show that the three-particle hadronic W decays have potential to be measured at the LHC. The possibility of measuring an involved spectrum of decay products could considerably expand our knowledge of how the W decays, and experimental techniques acquired in making these measurements would be useful for application to future measurements of exclusive hadronic Higgs boson decays.
Highlights
Experimental measurements of the decay modes of the W boson are summarised in the Particle Data Group (PDG) review [1]
∼1011 W bosons will be produced at the high luminosity (HL) large hadron collider (LHC), and orders of magnitude more at proposed future hadron colliders, the huge QCD background to generic W -production final states, and the trigger challenges, render many precision studies of
We perform a Monte Carlo (MC) study to estimate the reach of the HLLHC and future hadron colliders in observing such two- and three-particle exclusive hadronic decays, with two separate analyses to search for W → π γ and W → π π π as explicit examples
Summary
Experimental measurements of the decay modes of the W boson are summarised in the Particle Data Group (PDG) review [1]. ∼1011 W bosons will be produced at the high luminosity (HL) large hadron collider (LHC), and orders of magnitude more at proposed future hadron colliders, the huge QCD background to generic W -production final states, and the trigger challenges, render many precision studies of. In this note we focus on fully exclusive hadronic decays of the W , which are experimentally very difficult to study at a hadron collider For this we use a technique that utilises what can be seen as an extreme form of jet substructure and which we refer to as single particle jet isolation – requiring jets which have as constituents a single particle (with a looser definition when the particle is a photon).
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
