Search for the Standard Model Higgs boson in the H->WW->llnunu decay mode using 1.7 fb-1 of data collected with the ATLAS detector at sqrt(s)=7 TeV

A Higgs boson search in the H->WW->llnunu (l=e,mu) decay mode has been performed using 1.7 fb^-1 of proton-proton collisions at a centre-of-mass energy of 7 TeV collected with the ATLAS detector. No significant evidence of a Standard Model Higgs boson is found. An upper bound is placed on the Higgs boson production cross-section as a function of m_H. A Higgs boson with a mass in the range from 154~GeV to 186 GeV is excluded at 95% Confidence Level, while the expected exclusion range is 135 <= m_H <= 196 GeV.