  This Letter reports a search for a heavy particle that decays to WW using
events produced in pp collisions at sqrt(s) = 7 TeV. The data were recorded in
2011 by the ATLAS detector and correspond to an integrated luminosity of 4.7
fb-1. WW to l nu l' nu'(l, l' = e or mu) final states are considered and the
distribution of the transverse mass of the WW candidates is found to be
consistent with Standard Model expectations. Upper limits on the production
cross section times branching ratio into W boson pairs are set for
Randall-Sundrum and bulk Randall-Sundrum gravitons, which result in observed
95% CL lower limits on the masses of the two particles of 1.23 TeV and 0.84
TeV, respectively.
