Search for heavy neutral leptons in $W^+\to\mu^{+}\mu^{\pm}\text{jet}$ decays

Understand

A search is performed for heavy neutrinos in the decay of a $W$ boson into two muons and a jet.

• The data set corresponds to an integrated luminosity of approximately $3.0 \text{ fb}^{-1}$ of proton-proton collision data at centre-of-mass energies of 7 and $8 \text{ TeV}$ collected with the LHCb experiment.
• Both same-sign and opposite-sign muons in the final state are considered.
• Data are found to be consistent with the expected background.