Light meson spectrum with $N_f=2+1$ dynamical overlap fermions (2008)
Noaki, J., Aoki, S., Chiu, T. W., Fukaya, H., Hashimoto, S., Hsieh, T. H., ...
We report on a numerical simulation with 2+1 dynamical flavors of overlap fermions. We calculate pseudo-scalar masses and decay constants on a $16^3\times 48 \times (0.11 {\rm fm})^4$ lattice at five...
Topological susceptibility in (2+1)-flavor lattice QCD with overlap fermion (2008)
Chiu, T. W., Aoki, S., Hashimoto, S., Hsieh, T. H., Kaneko, T., Matsufuru, H., ...
We determine the topological susceptibility \chi_t in the topologically-trivial sector generated by lattice simulations of N_f = 2+1 QCD with overlap Dirac fermion, on a 16^3 x 48 lattice with...
The Arcminute Microkelvin Imager (2008)
Barker, R. W., Biddulph, P., Bly, D., Boysen, R. C., Brown, A. R., ...
The Arcminute Microkelvin Imager is a pair of interferometer arrays operating with six frequency channels spanning 13.9-18.2 GHz, with very high sensitivity to angular scales 30''-10'. The telescope...
Lattice calculation of strong coupling constant from vacuum polarization functions (2008)
Shintani, E., Aoki, S., Chiu, T. W., Hashimoto, S., Hsieh, T. H., Kaneko, T., ...
We calculate the vacuum polarization functions on the lattice with exact chiral symmetry. By matching the lattice data at large momentum scales with the perturbative expansion supplemented by...
Nucleon sigma term and strange quark content from lattice QCD with exact chiral symmetry (2008)
Ohki, H., Fukaya, H., Hashimoto, S., Kaneko, T., Matsufuru, H., Noaki, J., ...
We calculate the nucleon sigma term in two-flavor lattice QCD utilizing the Feynman-Hellman theorem. Both sea and valence quarks are described by the overlap fermion formulation, which preserves...
S-parameter and pseudo-Nambu-Goldstone boson mass from lattice QCD (2008)
Shintani, E., Aoki, S., Fukaya, H., Hashimoto, S., Kaneko, T., Matsufuru, H., ...
We present a lattice calculation of $L_{10}$, one of the low energy constants in Chiral Perturbation Theory, and the charged-neutral pion squared mass splitting, using dynamical overlap fermion....
Topological susceptibility in 2-flavor lattice QCD with fixed topology (2008)
Chiu, T. W., Aoki, S., Fukaya, H., Hashimoto, S., Hsieh, T. H., Kaneko, T., ...
We determine the topological susceptibility $ \chi_t $ in the trivial topological sector generated by lattice simulations of two-flavor QCD with overlap Dirac fermion, on a $16^3 \times 32$ lattice...
Convergence of the chiral expansion in two-flavor lattice QCD (2008)
Noaki, J., Aoki, S., Chiu, T. W., Fukaya, H., Hashimoto, S., Hsieh, T. H., ...
We test the convergence property of the chiral perturbation theory (ChPT) using a lattice QCD calculation of pion mass and decay constant with two dynamical quark flavors. The lattice calculation is...
Two-flavor QCD simulation with exact chiral symmetry (2008)
Aoki, JLQCD Collaboration: S., Fukaya, H., Hashimoto, S., Ishikawa, K-I., Kanaya, K., Kaneko, T., ...
We perform numerical simulations of lattice QCD with two flavors of dynamical overlap quarks, which have exact chiral symmetry on the lattice. While this fermion discretization is computationally...
Factors of hospitalization for mild heat illness (2008)
Todani, M, Ryosuke, T, Kaneko, T, Kawamura, Y, Kasaoka, S, Maekawa, T
No abstract available.
B_K with two flavors of dynamical overlap fermions (2008)
Aoki, S., Fukaya, H., Hashimoto, S., Noaki, J., Kaneko, T., Matsufuru, H., ...
We present a two-flavor QCD calculation of $B_K$ on a $16^3 \times 32$ lattice at $a\sim 0.12$ fm (or equivalently $a^{-1}\sim$1.67 GeV). Both valence and sea quarks are described by the overlap...
Implementation of an Optimised Cassegrain System for Radio Telescopes (2007)
Holler, C. M., Hills, R. E., Jones, M. E., Grainge, K., Kaneko, T.
We present the antenna design for a radio interferometer, the Arcminute Microkelvin Imager, together with its beam pattern measurement. Our aim was to develop a low-cost system with high aperture...
Lattice study of meson correlators in the epsilon-regime of two-flavor QCD (2007)
Fukaya, JLQCD Collaboration: H., Aoki, S., Hashimoto, S., Kaneko, T., Matsufuru, H., Noaki, J., ...
We calculate mesonic two-point functions in the epsilon-regime of two-flavor QCD on the lattice with exact chiral symmetry. We use gauge configurations of size 16^3 32 at the lattice spacing a \sim...
AMI limits on 15 GHz excess emission in northern HII regions (2007)
Scaife, A. M. M., Hurley-Walker, N., Davies, M. L., Duffett-Smith, P. J., Feroz, F., Grainge, K. J. B., ...
We present observations between 14.2 and 17.9 GHz of sixteen Galactic HII regions made with the Arcminute Microkelvin Imager (AMI). In conjunction with data from the literature at lower radio...
Meson correlators in the epsilon-regime of two-flavor lattice QCD (2007)
Aoki, S., Hashimoto, S., Kaneko, T., Matsufuru, H., Noaki, J., ...
We calculate the meson correlators in the $\epsilon$-regime of two-flavor QCD. On a $16^3\times 32$ lattice with $a\sim 0.11$ fm, the lattice simulations are performed with the dynamical overlap...
Lattice simulation of 2+1 flavors of overlap light quarks (2007)
Hashimoto, JLQCD Collaboration: S., Aoki, S., Fukaya, H., Kaneko, T., Matsufuru, H., Noaki, J., ...
We report on the status of the dynamical overlap QCD simulation project by the JLQCD collaboration. After completing two-flavor QCD simulation on a 16^3x32 lattice at lattice spacing a 0.12 fm, we...
Light meson spectrum with $N_f=2$ dynamical overlap fermions (2007)
Noaki, J., Aoki, S., Fukaya, H., Hashimoto, S., Kaneko, T., Matsufuru, H., ...
We present numerical simulation of QCD with two dynamical quark flavors described by the overlap fermion action on a $16^3\times 32\times (0.12 {\rm fm})^4$ lattice. We calculate pseudo-scalar masses...
Topological susceptibility in two-flavor lattice QCD with exact chiral symmetry (2007)
Aoki, S., Chiu, T. W., Fukaya, H., Hashimoto, S., Hsieh, T. H., Kaneko, T., ...
We determine the topological susceptibility $\chi_t$ in two-flavor QCD using the lattice simulations at a fixed topological sector. The topological charge density is unambiguously defined on the...
B_K with dynamical overlap fermions (2007)
Yamada, JLQCD Collaboration: N., Aoki, S., Fukaya, H., Hashimoto, S., Noaki, J., Kaneko, T., ...
We report on a calculation of $B_K$ with two-flavor dynamical overlap fermions on a $16^3 \times 32$ lattice at $a\sim 0.12$ fm. The results are compared with the PQChPT prediction of quark mass...
Combination of CDF and D0 results on the W boson mass and width (2007)
Abazov, V.M., Abbott, B., Abdesselam, A., Abolins, M., Abramov, V., S. Acharya, B., ...
The results based on 199295 data (Run 1) from the CDF and D0 experiments on the measurements of the W boson mass and width are presented, along with the combined results. We report a Tevatron...
Combination of CDF and D0 results on the W boson mass and width (2007)
Abazov, V.M., Abbott, B., Abdesselam, A., Abolins, M., Abramov, V., S. Acharya, B., ...
The results based on 199295 data (Run 1) from the CDF and D0 experiments on the measurements of the W boson mass and width are presented, along with the combined results. We report a Tevatron...
Combination of CDF and D0 results on the W boson mass and width (2007)
Abazov, V.M., Abbott, B., Abdesselam, A., Abolins, M., Abramov, V., S. Acharya, B., ...
The results based on 199295 data (Run 1) from the CDF and D0 experiments on the measurements of the W boson mass and width are presented, along with the combined results. We report a Tevatron...
Two-flavor lattice QCD in the epsilon-regime and chiral Random Matrix Theory (2007)
Fukaya, TWQCD Collaboration: H., Aoki, S., Chiu, T. W., Hashimoto, S., Kaneko, T., ...
The low-lying eigenvalue spectrum of the QCD Dirac operator in the epsilon-regime is expected to match with that of chiral Random Matrix Theory (ChRMT). We study this correspondence for the case...
Light quark masses from unquenched lattice QCD (2007)
Aoki, S., Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., ...
We calculate the light meson spectrum and the light quark masses by lattice QCD simulation, treating all light quarks dynamically and employing the Iwasaki gluon action and the nonperturbatively...
Kaneko, T., Aoki, S., Della Morte, M., Hashimoto, S., Hoffmann, R., Sommer, R.
We perform a non-perturbative determination of the improvement coefficient c_A to remove O(a) discretization errors in the axial vector current in three-flavor lattice QCD with the Iwasaki gauge...
Two-flavor lattice QCD simulation in the epsilon-regime with exact chiral symmetry (2007)
Fukaya, JLQCD Collaboration: H., Aoki, S., Chiu, T. W., Hashimoto, S., Kaneko, T., Matsufuru, H., ...
We perform lattice simulations of two-flavor QCD using Neuberger's overlap fermion, with which the exact chiral symmetry is realized at finite lattice spacings. The epsilon-regime is reached by...
T. Kaneko, S. Aoki, M. Della Morte, S. Hashimoto, R. Hoffmann, ...
Journal article
Aoki, S., Fukugita, M., Hashimoto, S., Ishizuka, N., ...
We present a summary of results of the joint CP-PACS and JLQCD project toward a 2+1 flavor full QCD simulation with the O(a)-improved Wilson quark formalism and the Iwasaki gauge action....
Dynamical overlap fermions in the epsilon-regime (2006)
Fukaya, JLQCD Collaboration: H., Hashimoto, S., Kanaya, K., Kaneko, T., Matsufuru, H., Ogawa, K., ...
We report on the two-flavor QCD simulation in the epsilon-regime using the overlap fermion formulation. Sea quark mass is reduced to ~ 2 MeV on a 16^3x32 lattice with the lattice spacing ~ 0.11fm....
Dynamical overlap fermion at fixed topology (2006)
Hashimoto, JLQCD Collaboration: S., Aoki, S., Fukaya, H., Kanaya, K., Kaneko, T., Matsufuru, H., ...
We launched a project to perform dymanical fermion simulations using the overlap fermion formulation for sea quarks. In order to avoid the appearace of near-zero modes of the hermitian Wilson-Dirac...
Yamada, JLQCD Collaboration: N., Aoki, S., Fukaya, H., Hashimoto, S., Ishikawa, K-I., Kanaya, K., ...
We perform a systematic study of low-lying eigenmodes of $H_w$ with various gauge actions to find the optimal choice for dynamical overlap fermion simulations, with which one may achieve lower...
Lattice gauge action suppressing near-zero modes of H_W (2006)
Fukaya, JLQCD Collaboration: H., Hashimoto, S., Kaneko, T., Matsufuru, H., Onogi, T., ...
We propose a lattice action including unphysical Wilson fermions with a negative mass m_0 of the order of the inverse lattice spacing. With this action, the exact zero mode of the hermitian...
Dawson, C., Izubuchi, T., Kaneko, T., Sasaki, S., Soni, A.
We calculate the vector form factor in K \to \pi l \nu semileptonic decays at zero momentum transfer f_+(0) from numerical simulations of two-flavor QCD on the lattice. Our simulations are carried...
Roles of extraterrestrial complex organics in chemical evolution toward origins of life (2006)
Kobayashi, Kensei, Tonishi, H., Tsuboi, T., Suzuki, N., Kaneko, T., Takano, Y., ...
Buttar, C., Dittmaier, S., Drollinger, V., Frixione, S., Nikitenko, A., Abdullin, S. Willenbrock S., ...
This Report summarises the activities of the "SM and Higgs" working group for the Workshop "Physics at TeV Colliders", Les Houches, France, 2-20 May, 2005. On the one hand, we performed a variety of...
GR@PPA 2.7 event generator for $pp$/$p\bar{p}$ collisions (2006)
Tsuno, S., Kaneko, T., Kurihara, Y., Odaka, S., Kato, K.
The GR@PPA event generator has been updated to version 2.7. This distribution provides event generators for $V$ ($W$ or $Z$) + jets ($\leq$ 4 jets), $VV$ + jets ($\leq$ 2 jets) and QCD multi-jet...
Numerical precision control and GRACE (2006)
Fujimoto, J., Hamaguchi, N., Ishikawa, T., Kaneko, T., Morita, H., Perret-Gallix, D., ...
The control of the numerical precision of large-scale computations like those generated by the GRACE system for automatic Feynman diagram calculations has become an intrinsic part of those packages....
A.C. Buttar, DESY Forschung Hochenergiephysik, S. Dittmaier, V. Drollinger, S. Frixione, A. Nikitenko, ...
Internal report | Preprint
Pion form factors in two-flavor QCD (2005)
Hashimoto, JLQCD Collaboration: S., Aoki, S., Fukugita, M., Ishizuka, N., Iwasaki, Y., ...
We present a calculation of pion electromagnetic and scalar form factors in two-flavor QCD with the non-perturbatively O(a)-improved Wilson fermion. Chiral extrapolation of the corresponding charge...
Electroweak Corrections for the Study of the Higgs Potential at the LC (2005)
Boudjema, F., Fujimoto, J., Ishikawa, T., Kaneko, T., Kato, K., Kurihara, Y., ...
The full electroweak radiative correction is calculated for the process ee--> nunubarHH which is a window for the study of the Higgs potential at the future linear collider. The calculation is done...
Kaon semileptonic decay form factors in two-flavor QCD (2005)
Tsutsui, JLQCD Collaboration: N., Aoki, S., Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., ...
We present a calculation of the kaon form factors in two-flavor QCD with the non-perturbatively $O(a)$-improved Wilson quark action. In order to achieve a few percent accuracy in the study of SU(3)...
K_l3 form factor with two-flavors of dynamical domain-wall quarks (2005)
Dawson, C., Izubuchi, T., Kaneko, T., Sasaki, S., Soni, A.
We report on our calculation of K \to \pi vector form factor by numerical simulations of two-flavor QCD on a 16^3x32x12 lattice at a \simeq 0.12 fm using domain-wall quarks and DBW2 glue. Our...
Light hadron spectrum and quark masses in 2+1 flavor QCD (2005)
Ishikawa, JLQCD Collaborations: T., Aoki, S., Bär, O., Fukugita, M., Hashimoto, S., ...
CP-PACS and JLQCD collaborations are carrying out a joint project of the 2+1 flavor full QCD simulation. Gauge configurations are generated for the non-perturbatively $O(a)$-improved Wilson quark...
Barker, AMI Collaboration: R., Biddulph, P., Bly, D., Boysen, R., Brown, A., Clementson, C., ...
We report the first detection of a Sunyaev-Zel'dovich (S-Z) decrement with the Arcminute Microkelvin Imager (AMI). We have made commissioning observations towards the cluster A1914 and have measured...
Aoki, JLQCD Collaborations: S., Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., ...
We perform a nonperturbative determination of the $O(a)$-improvement coefficient $c_{\rm SW}$ and the critical hopping parameter $\kappa_c$ for $N_f$=3, 2, 0 flavor QCD with the RG-improved gauge...
I=2 Pion Scattering Length from Two-Pion Wave Functions (2005)
Fukugita, M., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., Kanaya, K., ...
We calculate the two-pion wave function in the ground state of the I=2 $S$-wave system and find the interaction range between two pions, which allows us to examine the validity of the necessary...
Numerical Contour Integration for Loop Integrals (2005)
A fully numerical method to calculate loop integrals, a numerical contour-integration method, is proposed. Loop integrals can be interpreted as a contour integral in a complex plane for an integrand...
Photodegradation of 1,3,5-trichlorobenzene in aqueous surfactant solutions (2005)
Itoh, Y, Kaneko, T, Akahane, E, Shirai, H, Kojima, M
The original publication is available at www.springerlink.com
Light hadron spectrum in 2+1 flavor full QCD by CP-PACS and JLQCD Collaborations (2004)
Ishikawa, T., Aoki, S., Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., ...
CP-PACS and JLQCD Collaborations are carrying out a joint project of the 2+1 flavor full QCD with the RG-improved gauge action and the non-perturbatively ${\cal O}(a)$-improved Wilson quark action....
A scaling study of the step scaling function of quenched QCD with improved gauge actions (2004)
Aoki, S., Fukugita, M., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., ...
We study the scaling behavior of the step scaling function for SU(3) gauge theory, employing the Iwasaki gauge action and the Luescher-Weisz gauge action. In particular, we test the choice of...
Kayaba, Y., Aoki, S., Fukugita, M., Ishikawa, K-I., Iwasaki, Y., Kanaya, K., ...
We calculate charmed meson spectra and decay constants in lattice QCD employing one-loop $O(a)$ improved heavy quark action and axial-vector currents. In quenched simulations at $a \sim 0.1$ fm with...
I=2 Pion Scattering Length from Two-Pion Wave Function (2004)
Fukugita, M., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., Kanaya, K., ...
We present a report on a calculation of scattering length for I=2 $S$-wave two-pion system from two-pion wave function. Calculations are made with an RG-improved action for gluons and improved Wilson...
Chiral extrapolations with small sea quark mass data in two-flavor lattice QCD (2004)
Aoki, S., Fukugita, M., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., ...
We present results on the light hadron spectrum and quark mass in two-flavor QCD calculated with small sea quark masses down to $m_{PS}/m_{V}=0.35$. The configurations are generated using the RG...
Aoki, JLQCD Collaboration: S., Fukugita, M., Hashimoto, S., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., ...
Three-flavor QCD simulation with the $O(a)$-improved Wilson fermion action is made employing an exact fermion algorithm developed for odd number of quark flavors. For the plaquette gauge action, an...
Takeda, S., Aoki, S., Fukugita, M., Ishikawa, K-I., Ishizuka, N., Iwasaki, Y., ...
We study the scaling behavior of the step scaling function for SU(3) gauge theory, employing the renormalization-group improved Iwasaki gauge action and the perturbatively improved L\"uscher-Weisz...
Boudjema, F., Fujimoto, J., Ishikawa, T., Kaneko, T., Kato, K., Kurihara, Y., ...
We performed the calculation of the full O(alpha) corrections to e+e- -> mu- nu-bar u d-bar with the help of the GRACE/1-LOOP system. We discuss how a finite decay width introduces a serious gauge...
Electroweak corrections to Higgs production through ZZ fusion at the linear collider (2004)
Boudjema, F., Fujimoto, J., Ishikawa, T., Kaneko, T., Kato, K., Kurihara, Y., ...
We present the full order alpha electroweak radiative corrections to e+e- -> e+e-H. The computation is performed with the help of GRACE-loop. The extraction of the full QED corrections is performed,...