Evidence of the \Theta^+ in the \gamma d \to K^+K^-pn reaction (2008)
Nakano, T., Muramatsu, N., Ahn, D. S., Ahn, J. K., Akimune, H., Asano, Y., ...
The \gamma d \to K^+K^-pn reaction has been studied to search for the evidence of the \Theta^+ by detecting K^+K^- pairs at forward angles. The Fermi-motion corrected nK^+ invariant mass distribution...
Matsunami, M., Chainani, A., Taguchi, M., Eguchi, R., Ishida, Y., Takata, Y., ...
Hard x-ray photoemission and optical spectroscopies have been performed on YbS and Yb metal to determine the precise $f$-electron occupation. A comparison of the photoemission spectra with the energy...
Kawada, Y., Nagahama, H., Omori, Y., Yasuoka, Y., Ishikawa, T., Tokonami, S., ...
Prior to large earthquakes (e.g. 1995 Kobe earthquake, Japan), an increase in the atmospheric radon concentration is observed, and this increase in the rate follows a power-law of the...
Anomalous radon emanation linked to preseismic electromagnetic phenomena (2008)
Omori, Y., Yasuoka, Y., Nagahama, H., Kawada, Y., Ishikawa, T., Tokonami, S., ...
Anomalous emanation of radon (222Rn) was observed preceding large earthquakes and is considered to be linked to preseismic electromagnetic phenomena (e.g. great changes of atmospheric electric field...
Hashimoto, Y., Tadai, O., Tanimizu, M., Tanikawa, W., Hirono, T., Aoike, K., ...
The iron content and the asymmetry of iron and magnesium ions in chlorites are examined for the Chelungpu Fault in Taiwan, which is a seismogenic fault. The samples are collected from the cores...
Hashimoto, Y., Tadai, O., Tanimizu, M., Tanikawa, W., Hirono, T., Lin, W., ...
The iron content and the asymmetry of iron and magnesium ions in chlorites are examined for the Chelungpu Fault in Taiwan, which is a seismogenic fault. The samples are collected from the cores...
Photoproduction of Lambda(1405) and Sigma^{0}(1385) on the proton at E_\gamma = 1.5-2.4 GeV (2008)
Niiyama, M., Fujimura, H., Ahn, D. S., Ahn, J. K., Ajimura, S., Bhang, H. C., ...
Differential cross sections for $\gamma p \to K^+\Lambda(1405)$ and $\gamma p \to K^+\Sigma^0(1385)$ reactions have been measured in the photon energy range from 1.5 to 2.4 GeV and the angular range...
VLBI for better gravimetry in SELENE (2008)
Hanada, H, Iwata, T, Namiki, N, Kawano, N, Asari, K, Ishikawa, T, ...
Photoproduction of neutral kaons on the liquid deuterium target in the threshold region (2007)
Tsukada, K., Takahashi, T., Watanabe, T., Fujii, Y., Futatsukawa, K., Hashimoto, O., ...
The photoproduction process of neutral kaons on a liquid deuterium target is investigated near the threshold region, Egamma = 0.8-1.1 GeV. K0 events are reconstructed from positive and negative...
$\Lambda N$ correlations from the stopped $K^-$ reaction on ${}^4$He (2007)
Suzuki, T., Bhang, H., Chiba, J., Choi, S., Fukuda, Y., Hanaki, T., ...
We have investigated correlations of coincident $\Lambda N$ pairs from the stopped $K^-$ reaction on ${}^4$He, and clearly observed $\Lambda p$ and $\Lambda n$ branches of the two-nucleon absorption...
Comparative study on the effect of ethnicity on wisdom tooth eruption (2007)
Olze, Andreas, Van Niekerk, P., Ishikawa, T., Zhu, B.L., Schulz, Ronald, Maeda, H., ...
The current knowledge base for evaluating the influence of ethnic origin on wisdom tooth eruption is still inadequate. We therefore analyzed and compared the chronology of wisdom tooth eruption in...
Status reports from the GRACE Group (2007)
Yasui, Y., Ueda, T., De Doncker, E., Fujimoto, J., Hamaguchi, N., Ishikawa, T., ...
We discuss a new approach for the numerical evaluation of loop integrals. The fully numerical calculations of an infrared one-loop vertex and a box diagram are demonstrated. To perform these...
$\Lambda d$ correlations from the $^4$He(stopped-$K^-$,$d$) reaction (2007)
Suzuki, T., Bhang, H., Chiba, J., Choi, S., Fukuda, Y., Hanaki, T., ...
We have observed an intense high-energy component in an inclusive $^4$He(stopped $K^-$, $d$) spectrum. For back-to-back $\Lambda d$ pairs a prominent event cluster has been found just below the...
Precise Numerical Evaluation of the Scalar One-Loop Integrals with the Infrared Divergence (2007)
Yuasa, F., De Doncker, E., Fujimoto, J., Hamaguchi, N., Ishikawa, T., Shimizu, Y.
We present a new approach for obtaining very precise integration results for infrared vertex and box diagrams, where the integration is carried out directly without performing any analytic...
Search for strange tribaryon states in the inclusive ^4He(K^{-}_{stopped}, p) reaction (2007)
Sato, M., Bhang, H., Chiba, J., Choi, Seonho, Fukuda, Y., Hanaki, T., ...
A search for tribaryon states was performed at KEK-PS. We adopted the $^4$He($K^-_{stopped}, p)$ reaction to populate the states with strangeness -1, charge 0 and isospin 1. No significant narrow...
Backward-angle photoproduction of $\pi^0$ mesons on the proton at $E_\gamma$ = 1.5--2.4 GeV (2007)
Sumihama, M., Ahn, J. K., Akimune, H., Asano, Y., Chang, W. C., Daté, S., ...
Differential cross sections and photon beam asymmetries for $\pi^0$ photoproduction have been measured at $E_\gamma$ = 1.5--2.4 GeV and at the $\pi^0$ scattering angles, --1 $
Precision measurement of the $3d \to 2p$ x-ray energy in kaonic $^4$He (2007)
Okada, S., Beer, G., Bhang, H., Cargnelli, M., Chiba, J., Choi, Seonho, ...
We have measured the Balmer-series x-rays of kaonic $^4$He atoms using novel large-area silicon drift x-ray detectors in order to study the low-energy $\bar{K}$-nucleus strong interaction. The energy...
Forward coherent $\phi$-meson photoproduction from deuterons near threshold (2007)
Chang, W. C., Horie, K., Shimizu, S., Miyabe, M., Ahn, D. S., Ahn, J. K., ...
Differential cross sections and decay asymmetries for coherent $\phi$-meson photoproduction from deuterons were measured for the first time at forward angles using linearly polarized photons at...
2+1 Flavor Lattice QCD with Luescher's Domain-Decomposed HMC Algorithm (2006)
Aoki, S., Ishikawa, T., Ishizuka, N., Kanaya, K., ...
We report on a study of 2+1 flavor lattice QCD with the $O(a)$-improved Wilson quarks on a $16^3\times 32$ lattice at the lattice spacing $1/a\approx 2$GeV employing Luescher's domain-decomposed...
Aoki, S., Ishikawa, T., Ishizuka, N., Kanaya, K., Kuramashi, Y., ...
We apply the UV-filtering preconditioner, previously used to improve the Multi-Boson algorithm, to the Polynomial Hybrid Monte Carlo (UV-PHMC) algorithm. The performance test for the algorithm is...
An estimate of the eta and eta-prime meson masses in Nf=2+1 lattice QCD (2006)
Aoki, JLQCD Collaborations: S., Fukugita, M., Ishikawa, T., Ishizuka, N., ...
Masses of the eta and eta-prime mesons are estimated in Nf=2+1 lattice QCD with the non-perturbatively O(a) improved Wilson quark action and the Iwasaki RG-improved gluon action, using CP-PACS/JLQCD...
Photoemission evidence for a Mott-Hubbard metal-insulator transition in VO$_2$ (2006)
Eguchi, R., Taguchi, M., Matsunami, M., Horiba, K., Yamamoto, K., Ishida, Y., ...
The temperature ($T$) dependent metal-insulator transition (MIT) in VO$_2$ is investigated using bulk sensitive hard x-ray ($\sim$ 8 keV) valence band, core level, and V 2$p-3d$ resonant...
Photo-production of neutral kaons on 12C in the threshold region (2006)
Watanabe, T., Bydžovský, P., Dobashi, K., Endo, S., Fujii, Y., Hashimoto, O., ...
Kaon photo-production process on $^{12}$C has been studied by measuring neutral kaons in a photon energy range of 0.8$-$1.1 GeV. Neutral kaons were identified by the invariant mass constructed from...
Matsunami, M., Horiba, K., Taguchi, M., Yamamoto, K., Chainani, A., Takata, Y., ...
Semiconducting skutterudite CeFe$_4$P$_{12}$ is investigated by synchrotron x-ray photoemission spectroscopy (PES) and x-ray absorption spectroscopy (XAS). Ce 3$d$ core-level PES and 3$d-4f$ XAS, in...
The Japanese space gravitational wave antenna - DECIGO (2006)
Kawamura, S., Nakamura, T., Ando, M., Seto, N., Tsubono, K., Numata, K., ...
DECi-hertz Interferometer Gravitational wave Observatory (DECIGO) is the future Japanese space gravitational wave antenna. It aims at detecting various kinds of gravitational waves between 1 mHz and...
Lorenzo, J. E., Katsumata, K., Narumi, Y., Shimomura, S., Tanaka, Y., Hagiwara, M., ...
We report the observation of a jump in the a- and c-lattice constants at the critical field H-c1 and at temperatures of the order 40 mK in the S=1/2 spin-gapped compound Cu-2(C5H12N2)(2)Cl-4 by means...
Belanger, G., Boudjema, F., Fujimoto, J., Ishikawa, T., Kaneko, T., Kato, K., ...
We describe the main building blocks of a generic automated package for the calculation of Feynman diagrams. These blocks include the generation and creation of a model file, the graph generation,...
Full order_alpha electroweak and order alpha_s corrections to e^+e^- --> t t H (2003)
Belanger, G., Boudjema, F., Fujimoto, J., Ishikawa, T., Kaneko, T., Kato, K., ...
We present the full ${{\cal O}}(\alpha)$ electroweak radiative corrections to associated Higgs top pair production in $e^+e^-$ collisions. We combine these results with a new calculation of the full...
Sumihama, M., Ahn, D. S., Ahn, J. K., Akimune, H., Asano, Y., ...
Beam polarization asymmetries for the p(gamma,K+)Lambda and p(gamma,K+)sigma0 reactions are measured for the first time for Egamma=1.5-2.4 GeV and 0.6
Hydrodynamic Interactions between Two Swimming Bacteria
Ishikawa, T., Sekiya, G., Imai, Y., Yamaguchi, T.
This article evaluates the hydrodynamic interactions between two swimming bacteria precisely. We assume that each bacterium is force free and torque free, with a Stokes flow field around it. The...