We report on a search for extremely-high energy neutrinos with energies greater than 10(6) GeV using the data taken with the IceCube detector at the South Pole. The data was collected between April 2008 and May 2009 with the half-completed IceCube array. The absence of signal candidate events in the sample of 333.5 days of live time significantly improves model-independent limits from previous searches and allows to place a limit on the diffuse flux of cosmic neutrinos with an E-2 spectrum in the energy range 2.0 x 10(6) - 6.3 x 10(9) GeV to a level of E-2 phi
Javier García Hernández, Randoald Müller
Lesya Shchutska, Olivier Schneider, Aurelio Bay, Guido Haefeli, Elena Graverini, Alexey Boyarsky, Ettore Zaffaroni, Sun Hee Kim, Federico Leo Redi, Evgenii Shmanin, Nikolaos Charitonidis, Carina Trippl, Serhii Cholak, Jean-Loup Tastet, Ana Bárbara Rodrigues Cavalcante, Anton Petrov, Andrea Montanari