Niigata University

output

19922026

most citedSciPy 1.0--Fundamental Algorithms for Scientific Computing in Python

40.2k citations

researchers with a paper here

Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

collaborating institutions

Showing 2012Show all

63 papers · 1 filter

cond-mat.str-el2012★ 22 cited

Γ3-type Lattice Instability and the Hidden Order of URu2Si2

Tatsuya Yanagisawa, Shota Mombetsu, Hiroyuki Hidaka +7

We have performed ultrasonic measurements on single-crystalline URu2Si2 with pulsed magnetic fields, in order to check for possible lattice instabilities due to the hybridized stat…

hep-ph2012★ 7 cited

SUSY contributions to CP violations in $b \to s$ and $b \to d$ transitions facing on new data

Yusuke Shimizu, Morimitsu Tanimoto, Kei Yamamoto

We study the contribution of the gluino-squark mediated flavor changing process for the CP violation in $b \to s$ and $b \to d$ transitions facing on recent experimental data. The ma…

hep-ex2012★ 14 cited

Measurement of the inclusive semileptonic branching fraction $B (B_{s}^{0} \to X^{-} ℓ^{+} ν_{ℓ})$ at Belle

Belle Collaboration, C. Oswald, P. Urquijo +172

We report a measurement of the inclusive semileptonic $B_{s}^{0}$ branching fraction in a $121 f b^{- 1}$ data sample collected near the $Υ (5 S)$ resonance with the Belle detector at the…

hep-ex2012★ 22 cited

Search for CP Violation in the Decay $D^{+} \to K_{S}^{0} K^{+}$

B. R. Ko, E. Won, I. Adachi +142

We search for CP violation in the decay $D^{+} \to K_{S}^{0} K^{+}$ using a data sample with an integrated luminosity of 977 fb $^{- 1}$ collected with the Belle detector at the KEKB…

math.OA2012★ 4 cited

Finite-dimensional approximation properties for uniform Roe algebras

Hiroki Sako

We study property A for metric spaces $X$ with bounded geometry introduced by Guoliang Yu. Property A is an amenability-type condition, which is less restrictive than amenability f…

hep-lat2012★ 43 cited

End Point of a First-Order Phase Transition in Many-Flavor Lattice QCD at Finite Temperature and Density

Shinji Ejiri, Norikazu Yamada

Towards the feasibility study of the electroweak baryogenesis in realistic technicolor scenario, we investigate the phase structure of (2+Nf)-flavor QCD, where the mass of two flav…

hep-ex2012★ 23 cited

Study of B^0 -> rho^0 rho^0 decays, implications for the CKM angle phi_2 and search for other B^0 decay modes with a four-pion final state

The Belle Collaboration, P. Vanhoefer, J. Dalseno +171

We present a study of the branching fraction of the decay B^0->rho0rho0 and the fraction of longitudinally polarized rho0 mesons in this decay. The results are obtained from the fi…

cond-mat.supr-con2012★ 9 cited

Spin-Orbit Coupling in Multilayer Superconductors with Charge Imbalance

Daisuke Maruyama, Manfred Sigrist, Youichi Yanase

In this study, we investigate the spin susceptibility in the superconducting state of a multilayer system with a layer-dependent Rashba spin-orbit coupling, representing a locally…

hep-ph2012★ 20 cited

Single transverse-spin asymmetry for direct-photon and single-jet productions at RHIC

Koichi Kanazawa, Yuji Koike

We study the single transverse-spin asymmetry for the inclusive direct-photon and single-jet productions in the proton-proton collision based on the twist-3 mechanism in the collin…

hep-ph2012★ 44 cited

Heavy neutrino search in accelerator-based experiments

Takehiko Asaka, Shintaro Eijima, Atsushi Watanabe

We explore the feasibility of detecting heavy neutrinos by the existing facilities of neutrino experiments. A heavy neutrino in the mass range 1 MeV < M < 500 MeV is produced by pi…

hep-lat2012★ 10 cited

Blocking-inspired supersymmetric actions: a status report

Georg Bergner, Falk Bruckmann, Yoshio Echigo +3

We provide a status report on the advances in blocking-inspired supersymmetric actions. This is done at the example of interacting supersymmetric quantum mechanics as well as the W…

nucl-ex2012★ 163 cited

Observation of new microsecond isomers among fission products of 345 MeV/nucleon 238U

D. Kameda, T. Kubo, T. Ohnishi +56

A search for isomeric gamma-decays among fission fragments from 345 MeV/nucleon 238U has been performed at the RIKEN Nishina Center RI Beam Factory. Fission fragments were selected…

hep-ex2012★ 68 cited

Observation of ψ(4040) and ψ(4160) decay into ηJ/ψ

Belle Collaboration, X. L. Wang, Y. L. Han +126

The cross section for e^+e^- \to ηJ/ψbetween \sqrt{s}=3.8 GeV/c^2 and 5.3 GeV/c^2 is measured via initial state radiation using 980 fb^{-1} of data on and around the Υ(nS)(n=1,2,3,…

hep-ex2012★ 8 cited

Study of the Hadronic Transitions $Υ$ (2S) $\to (η, π^{0}) Υ$ (1S) at Belle

Belle Collaboration, U. Tamponi, R. Mussa +131

We study the rare hadronic transitions $Υ (2 S) \to Υ (1 S) η$ and $Υ (2 S) \to Υ (1 S) π^{0}$ using a sample of 158 $\times 1 0^{6}$ $Υ (2 S)$ decays collected with the Belle detecto…

hep-ex2012★ 34 cited

Direct Measurement of Backgrounds using Reactor-Off Data in Double Chooz

Y. Abe, C. Aberle, J. C. dos Anjos +170

Double Chooz is unique among modern reactor-based neutrino experiments studying $ν ˉ_{e}$ disappearance in that data can be collected with all reactors off. In this paper, we pres…

math.AG2012★ 19 cited

Rationality problem for algebraic tori

Akinari Hoshi, Aiichi Yamasaki

We give the complete stably rational classification of algebraic tori of dimensions $4$ and $5$ over a field $k$ . In particular, the stably rational classification of norm one tori…

hep-ex2012★ 72 cited

Measurements of Branching Fractions and Direct CP Asymmetries for B -> K pi, B->pi pi and B->to KK Decays

Y. -T. Duh, T. -Y. Wu, P. Chang +140

We report measurements of the branching fractions and direct CP asymmetries (A_{CP}) for B->K pi, pi pi and KK decays (but not pi^0 pi^0) based on the final data sample of 772x10^6…

cond-mat.supr-con2012★ 99 cited

Pair-density wave states through spin-orbit coupling in multilayer superconductors

Tomohiro Yoshida, Manfred Sigrist, Youichi Yanase

Spin singlet superconductors with quasi-two dimensional multilayer structure are studied in high magnetic fields. Specifically we concentrate on bi- and tri-layer systems whose lay…

nucl-ex2012★ 223 cited

New Result in the Production and Decay of an Isotope, 278[113], of the 113th Element

Kosuke Morita, Kouji Morimoto, Daiya Kaji +35

An isotope of the 113th element, i.e., 278[113], was produced in a nuclear reaction with a 70Zn beam on a 209Bi target. We observed six consecutive α-decays following the implantat…

nucl-th2012★ 59 cited

Pair correlation of giant halo nuclei in continuum Skyrme-Hartree-Fock-Bogoliubov theory

Y. Zhang, M. Matsuo, J. Meng

The giant halos predicted in neutron-rich Zr isotopes with $A = 124 - 138$ are investigated by using the self-consistent continuum Skyrme Hartree-Fock-Bogoliubov approach, in which the…

hep-th2012★ 7 cited

On Nontrivial Solutions around a Marginal Solution in Cubic Superstring Field Theory

Shoko Inatomi, Isao Kishimoto, Tomohiko Takahashi

We construct tachyon vacuum and half-brane solutions, using an extension of KBc algebra, in the theory around a type of identity-based marginal solutions in modified cubic superstr…

hep-ex2012★ 66 cited

First Test of Lorentz Violation with a Reactor-based Antineutrino Experiment

Double Chooz Collaboration, Y. Abe, C. Aberle +164

We present a search for Lorentz violation with 8249 candidate electron antineutrino events taken by the Double Chooz experiment in 227.9 live days of running. This analysis, featur…

hep-th2012★ 5 cited

Tachyon Vacuum of Bosonic Open String Field Theory in Marginally Deformed Backgrounds