Confirming the LHC Higgs discovery with WW

We investigate the prospects of observing a neutral Higgs boson decaying into a pair of W bosons (one real and the other virtual), followed by the W decays into qq′ℓν or jjℓν at the CERN Large Hadron Collider (LHC). Assuming that the missing transverse energy comes solely from the neutrino in W decay, we can reconstruct the W masses and then the Higgs mass. At the LHC with a center of mass energy (s) of 8 TeV and an integrated luminosity (L) of 25 fb−1, we can potentially establish a 6σ signal. A 5σ discovery of H→WW⁎→jjℓν for s=14 TeV can be achieved with L=6 fb−1. The discovery of H→WW implies that the recently discovered new boson is a CP-even scalar if its spin is zero. In addition, this channel will provide a good opportunity to study the HWW coupling.