Testing the littlest Higgs model with T-parity at the LHC Run-II

We study the littlest Higgs model with T-parity (LHT) in the process of pp→WH+WH-→W+W-AHAH at the 14 TeV LHC. With the W-jet tagging technique, we demonstrate that the bulk of the model parameter space can be probed at the level of more than 5σ in the signature of two fat W jets plus large missing energy. Furthermore, we propose a novel strategy of measuring the principle parameter f that is crucial to test the LHT model and to fix mass spectrum, including the dark matter particle. Our proposal can be easily incorporated into the current experimental program of diboson searches at the LHC Run-II.