New limits are presented on the cross section for weakly interacting massive particle (WIMP) nucleon scattering in the KIMS CsI(Tℓ) detector array at the Yangyang Underground Laboratory. The exposure used for these results is 24 524.3  kg·days. Nuclei recoiling from WIMP interactions are identified by a pulse shape discrimination method. A low energy background due to alpha emitters on the crystal surfaces is identified and taken into account in the analysis. The detected numbers of nuclear recoils are consistent with zero and 90% confidence level upper limits on the WIMP interaction rates are set for electron equivalent energies from 3 to 11 keV. The 90% upper limit of the nuclear recoil event rate for 3.6-5.8 keV corresponding to 2-4 keV in NaI(Tℓ) is 0.0098 counts/kg/keV/day, which is below the annual modulation amplitude reported by DAMA. This is incompatible with interpretations that enhance the modulation amplitude such as inelastic dark matter models. We establish the most stringent cross section limits on spin-dependent WIMP-proton elastic scattering for the WIMP masses greater than 20  GeV/c2.

Immobilization of biomolecules in tailor-made nanometerscale structures can significantly improve the performance of biocatalytic processes. For efficient biocatalytic processes, it is highly desirable to develop nanostructured materials that enable high loading and long-term stability of the biocatalysts, as well as low mass-transfer resistance. In this regard, inorganic mesoporous materials [1] with well-controlled pore structures have gained much attention as appropriate, high-capacity hosts for biocatalysts. [2][3][4][5] Template synthesis has frequently been used to synthesize novel porous carbon materials.[6] Recently, a new class of nanoporous carbons, ordered mesoporous carbon (OMC), has been synthesized using ordered mesoporous silica materials as COMMUNICATIONS 2828

The Collins effect connects transverse quark spin with a measurable azimuthal dependence in the yield of hadronic fragments around the quark's momentum vector. Using two different reconstruction methods, we find evidence of statistically significant azimuthal asymmetries for charged pion pairs in e(+)e(-) annihilation at a center-of-mass energy of 10.52 GeV, which can be attributed to a transverse polarization of the primordial quarks. The measurement was performed using a sample of 79 x 10(6) hadronic events collected with the Belle detector.

The Korea Invisible Mass Search (KIMS) experiment presents new limits on the WIMP-nucleon cross section using data from an exposure of 3409 kg·d taken with low-background CsI(Tl) crystals at Yangyang Underground Laboratory. The most stringent limit on the spin-dependent interaction for a pure proton case is obtained. The DAMA signal region for both spin-independent and spindependent interactions for the WIMP masses greater than 20 GeV/c 2 is excluded by the single experiment with crystal scintillators. I are sensitive to the spin-independent (SI) and spin-dependent (SD) interactions of WIMPs. Recently, the role of CsI in the direct search for SD WIMP for pure proton coupling has been pointed out [8]. It is worth noting that 127 I is the dominant target for the SI interactions in the DAMA experiment. The pulse shape discrimination (PSD) technique allows us to statistically separate nuclear recoil (NR) signals of WIMP interactions from the electron recoil (ER) signals due to the gamma ray background [9][10].The KIMS experiment is located at the Yangyang Undeground Laboratory (Y2L) at a depth of 700 m under an earth overburden. Details of the KIMS experiment and the first limit with 237 kg·d exposure data can be found in the previous publication [11]. Four low-background CsI(Tl) crystals are installed in the Y2L and operated at a temperature of T = 0• C. Throughout the exposure period, the temperature of the detector was kept stable to within ±0

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