New Physics and Two Boosted W-jets plus Missing Energy

Abstract

We show that the signature of two boosted $W$-jets plus large missing energy is very promising to probe heavy charged resonances ($X^{\pm }$) through the process of $pp\to X^{+}{X}^{-}\to W^{+}{W}^{-}{X}^0{X}^0$ where $X^0$ denotes dark matter candidate. The hadronic decay mode of the $W$ boson is considered to maximize the number of signal events. When the mass split between $X^{\pm }$ and $X^0$ is large, one has to utilize the jet-substructure technique to analyze the boosted $W$-jet. For illustration we consider the process of chargino pair production at the LHC, i.e., $pp\to {\chi }_1^{+}{\chi }_1^{-}\to W^{+}{W}^{-}{\chi }_1^0{\chi }_1^0$, and demonstrate that the proposed signature is able to cover more parameter space of $m_{{\chi }_1^{\pm }}$ and $m_{{\chi }_1^0}$ than the conventional signature of multiple leptons plus missing energy. More importantly, the signature of our interests is not sensitive to the spin of heavy resonances.

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