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 2014Show all

59 papers · 1 filter

hep-th2014★ 7 cited

Open String Fields as Matrices

Isao Kishimoto, Toru Masuda, Tomohiko Takahashi +1

We show that the action expanded around Erler-Maccaferri's N D-brane solution describes the N+1 D-brane system where one D-brane disappears due to tachyon condensation. String fiel…

hep-ex2014★ 32 cited

Search for $B_{s}^{0} \to γ γ$ and a measurement of the branching fraction for $B_{s}^{0} \to ϕ γ$

Belle Collaboration, D. Dutta, B. Bhuyan +148

We search for the decay $B_{s}^{0} \to γ γ$ and measure the branching fraction for $B_{s}^{0} \to ϕ γ$ using 121.4~ $fb^{- 1}$ of data collected at the $Υ(\mathrm{…

hep-ex2014★ 61 cited

Measurement of the $B ˉ \to X_{s} γ$ Branching Fraction with a Sum of Exclusive Decays

Belle Collaboration, T. Saito, A. Ishikawa +179

We use 772 $\times 1 0^{6}$ $B B ˉ$ meson pairs collected at the $Υ (4 S)$ resonance with the Belle detector to measure the branching fraction for $B ˉ \to X_{s} γ$ . Our me…

hep-ph2014★ 20 cited

Quark mixing from Delta(6N^2) family symmetry

Hajime Ishimori, Stephen F. King, Hiroshi Okada +1

We consider a direct approach to quark mixing based on the discrete family symmetry Delta (6N^2) in which the Cabibbo angle is determined by a residual Z_2 times Z_2 subgroup to be…

hep-ex2014★ 6 cited

Measurement of $B^{0} \to D_{s}^{-} K_{S}^{0} π^{+}$ and $B^{+} \to D_{s}^{-} K^{+} K^{+}$ branching fractions

J. Wiechczynski, J. Stypula, A. Abdesselam +171

We report a measurement of the $B^{0}$ and $B^{+}$ meson decays to the $D_{s}^{-} K_{S}^{0} π^{+}$ and $D_{s}^{-} K^{+} K^{+}$ final states, respectively, using $657 \times 1 0^{6} B B$ pairs col…

hep-ph2014★ 9 cited

Bottom-tau unification by neutrinos in a nonsupersymmetric SU(5) model

Takanao Tsuyuki

We show that Yukawa couplings of bottom quarks and tau leptons can be unified in a non-supersymmetric SU(5) model. We introduce an arbitrary number of right-handed neutrinos. Their…

nucl-th2014★ 24 cited

Continuum quasiparticle random phase approximation for astrophysical direct neutron capture reaction of neutron-rich nuclei

Masayuki Matsuo

We formulate a many-body theory to calculate the cross section of direct radiative neutron capture reaction by means of the Hartree-Fock-Bogoliubov mean-field model and the continu…

hep-ex2014★ 141 cited

Measurement of $e^{+} e^{-} \to π^{+} π^{-} ψ (2 S)$ via Initial State Radiation at Belle

X. L. Wang, C. Z. Yuan, C. P. Shen +151

We report measurement of the cross section of $e^{+} e^{-} \to π^{+} π^{-} ψ (2 S)$ between 4.0 and $5.5 GeV$ , based on an analysis of initial state radiation events in a $980 f b^{- 1}$ …

hep-ph2014★ 25 cited

Transverse single-spin asymmetries in $p^{↑} p \to γ X$ from quark-gluon-quark correlations in the proton

K. Kanazawa, Y. Koike, A. Metz +1

We analyze the transverse single-spin asymmetry in direct photon production from proton-proton collisions, denoted $A_{N}^{γ}$ , within collinear twist-3 factorization. We provide a cal…

hep-ph2014★ 19 cited

Lepton Universality in the $ν$ MSM

Takehiko Asaka, Shintaro Eijima, Kazuhiro Takeda

We consider the $ν$ MSM which is an extension of the Standard Model by three right-handed neutrinos with masses below the electroweak scale, in which the origins of neutrino masses,…

nucl-th2014★ 26 cited

Proton-neutron pairing vibrations in N=Z nuclei: Precursory soft mode of isoscalar pairing condensation

Kenichi Yoshida

L=0 proton-neutron ( $p n$ ) pair-addition and pair-removal strengths in $^{40}$ Ca and $^{56}$ Ni are investigated by means of the $p n$ particle-particle random-phase approximation emp…

hep-ex2014★ 53 cited

Observation of $e^{+} e^{-} \to π^{+} π^{-} π^{0} χ_{b J}$ and search for $X_{b} \to ω Υ (1 S)$ at $s \sim 10.867$ GeV

Belle Collaboration, X. H. He, C. P. Shen +158

The $e^{+} e^{-} \to π^{+} π^{-} π^{0} χ_{b J}$ ( $J = 0, 1, 2$ ) processes are studied using a 118~fb $^{- 1}$ data sample collected at a center-of-mass energy of 10.867 GeV, in the $Υ (10860)$ ener…

math.AC2014★ 1 cited

Completely m-full ideals and componentwise linear ideals

Tadahito Harima, Junzo Watanabe

We show that the class of completely m-full ideals coincides with the class of componentwise linear ideals in a polynomial ring over an infinite field.

hep-ex2014★ 9 cited

Evidence of $Υ (1 S) \to J / ψ + χ_{c 1}$ and search for double-charmonium production in $Υ (1 S)$ and $Υ (2 S)$ decays

Belle Collaboration, S. D. Yang, C. P. Shen +155

Using data samples of $102 \times 1 0^{6}$ $Υ (1 S)$ and $158 \times 1 0^{6}$ $Υ (2 S)$ events collected with the Belle detector, a first experimental search has been made for double-charmonium…

cond-mat.supr-con2014★ 16 cited

Spin-orbit Coupling and Multiple Phases in Spin-triplet Superconductor Sr $_{2}$ RuO $_{4}$

Youichi Yanase, Shuhei Takamatsu, Masafumi Udagawa

We study the spin-orbit coupling in spin-triplet Cooper pairs and clarify multiple superconducting (SC) phases in Sr $_{2}$ RuO $_{4}$ . Based on the analysis of the three-orbital Hubbard…

nucl-th2014★ 5 cited

Harmonic-oscillator excitations of precise few-body wave functions

W. Horiuchi, Y. Suzuki

A method for calculating the occupation probability of the number of harmonic oscillator (HO) quanta is developed for a precise few-body wave function obtained in a correlated Gaus…

cond-mat.supr-con2014★ 3 cited

Vortex Core Structure in Multilayered Rashba Superconductors

Yoichi Higashi, Yuki Nagai, Tomohiro Yoshida +1

We numerically study the electronic structure of a single vortex in two dimensional superconducting bilayer systems within the range of the mean-field theory. The lack of local inv…

cond-mat.supr-con2014★ 10 cited

Collapse of CuO Double Chains and Suppression of Superconductivity in High-Pressure Phase of YBa $_{2}$ Cu $_{4}$ O $_{8}$

Atsuko Nakayama, Yusuke Onda, Shuhei Yamada +8

The crystal structure and electrical resistivity of YBa $_{2}$ Cu $_{4}$ O $_{8}$ (Y124) were studied under high pressure up to 18 GPa using diamond-anvil cells, respectively, in order to cla…

cond-mat.str-el2014★ 39 cited

Electric Octupole Order in Bilayer Ruthenate Sr $_{3}$ Ru $_{2}$ O $_{7}$

Takanori Hitomi, Youichi Yanase

Although the odd-parity multipole order barely occurs in crystals with high symmetry, it can be formed in locally noncentrosymmetric crystals. We illustrate the odd-parity electric…

hep-ex2014★ 191 cited

Observation of a new charged charmoniumlike state in B -> J/psi K pi decays

Belle Collaboration, K. Chilikin, R. Mizuk +162

We present the results of an amplitude analysis of anti-B0 -> J/psi K- pi+ decays. A new charged charmoniumlike state Zc(4200)+ decaying to J/psi pi+ is observed with a significanc…

hep-th2014★ 3 cited

Observables for identity-based tachyon vacuum solutions

Isao Kishimoto, Toru Masuda, Tomohiko Takahashi

We consider a modified KBc algebra in bosonic open string field theory expanded around identity-based scalar solutions. By use of the algebra, classical solutions on the background…

hep-ex2014★ 11 cited

Measurement of Time-Dependent $C P$ Violation in $B^{0} \to η^{'} K^{0}$ Decays

Belle Collaboration, L. Šantelj, Y. Yusa +163

We present a measurement of the time-dependent $C P$ violation parameters in $B^{0} \to η^{'} K^{0}$ decays. The measurement is based on the full data sample containing $772 \times 1 0^{6}$ $B\ba…

cond-mat.supr-con2014★ 5 cited

Multi-orbital Fulde-Ferrell-Larkin-Ovchinnikov State in SrTiO_3 Heterostructures

Yasuharu Nakamura, Youichi Yanase

We study exotic superconducting states in SrTiO $_{3}$ heterostructures on the basis of the three-orbital model, which reproduces the band structure of two-dimensional electron gases.…

q-fin.GN2014★ 60 cited

Bank-firm credit network in Japan. An analysis of a bipartite network

Luca Marotta, Salvatore Miccichè, Yoshi Fujiwara +4

We present an analysis of the credit market of Japan. The analysis is performed by investigating the bipartite network of banks and firms which is obtained by setting a link betwee…

Open String Fields as Matrices

Search for Bs0​→γγ and a measurement of the branching fraction for Bs0​→ϕγ

Measurement of the Bˉ→Xs​γ Branching Fraction with a Sum of Exclusive Decays

Quark mixing from Delta(6N^2) family symmetry

Measurement of B0→Ds−​KS0​π+ and B+→Ds−​K+K+ branching fractions