Search for Higgs Bosons Decay $H\rightarrow W^+W^- \rightarrow l^{+}l^{-}\sla{p_{T}}$ for $115<M_H<130\,\gev$ Using Vector Boson Fusion

The sensitivity of the ATLAS experiment to low mass SM Higgs produced via Vector Boson Fusion mechanism is investigated. An event selection has been chosen to optimize the expected signal significance for $115<M_H<130\,\gev$ with the channel $H\rightarrow W^+W^- \rightarrow l^{+}l^{-}\sla{p_{T}}$. The improvement in signal significance with respect to previous analyses ranges between 20$\%$ and 30$\%$. Likelihood ratios are implemented in the calculation of confidence levels to improve the signal significance. This improves the signal significance by an additional $10-15\%$.