When one W decays to produce an electron and a neutrino, and the other W decays to produce a quark and an antiquark we see events containing an electron, an (invisible) neutrino and two jets: W⁺W^-→eνqq

Side View of Event

The neutrino leaves no signals in the detector. However, we can deduce its momentum by using the principal of conservation of momentum

End-On View of Event with Missing Momentum Vector Drawn

Next take a look at an example event.

Back to general section on "How to Identify Events Containing a Pair of W Particles".

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