Search for Weakly Interacting Massive Particles with the First Five-Tower Data from the Cryogenic Dark Matter Search at the Soudan Underground Laboratory

We report results from the Cryogenic Dark Matter Search at the Soudan Underground Laboratory (CDMS II) featuring the full complement of 30 detectors. A blind analysis of data taken between October 2006 and July 2007 sets an upper limit on the weakly interacting massive particle (WIMP) nucleon spin-independent cross section of $6.6\times {10}^{-44}{\mathrm{cm}}^2$ ($4.6\times {10}^{-44}{\mathrm{cm}}^2$ when combined with previous CDMS II data) at the 90% confidence level for a WIMP mass of $60\mathrm{GeV}/c^2$. This achieves the best sensitivity for dark matter WIMPs with masses above $44\mathrm{GeV}/c^2$, and significantly restricts the parameter space for some favored supersymmetric models.