High Energy Accelerator Research Organization

output

19912026

most citedEvidence for oscillation of atmospheric neutrinos

5.1k 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 2004Show all

236 papers · 1 filter

hep-ex2004★ 64 cited

Measurement of the gamma gamma -> pi+ pi- and gamma gamma -> K+ K- processes at energies of 2.4 - 4.1 GeV

H. Nakazawa

We have measured pi+pi- and K+K- production in two-photon collisions using 87.7 /fb of data collected with the Belle detector at the asymmetric energy e+e- collider KEKB. The cross…

hep-ex2004★ 2 cited

Study of B0 -> \bar{D}(*)0 pi+ pi- decays

K. Abe

We report the results of a study of neutral B decays to the $D^{0} π^{+} π^{-}$ and $D^{* 0} π^{+} π^{-}$ final states using complete $D^{(*) 0}$ reconstruction. The contributions from two-bod…

hep-ex2004★ 699 cited

Measurement of the J/Psi Meson and b-Hadron Production Cross Sections in ppbar Collisions at sqrt s = 1960 GeV

D. Acosta, CDF Collaboration

We present a new measurement of the inclusive and differential production cross sections of $J / ψ$ mesons and $b$ -hadrons in proton-antiproton collisions at $s = 1960$ GeV. The…

hep-ex2004★ 16 cited

Measurements of Branching Fractions and CP Asymmetries in B-> etah Decays

Paoti Chang

We report measurements of B to pseudoscalar-pseudoscalar decays with at least one eta meson in the final state using 140 fb^{-1} of data collected by the Belle detector at KEKB e^+…

hep-ex2004★ 153 cited

Dalitz analysis of the three-body charmless decays B+=>K+Pi+Pi- and B+=>K+K+K-

A. Garmash

We report results on the Dalitz analysis of three-body charmless B+=>K+Pi+Pi- and B+=>K+K+K- decays based on a 140 fb $^{- 1}$ data sample collected with the Belle detector. Measurem…

hep-ph2004★ 1 cited

Nuclear modification of valence-quark distributions and its effects on NuTeV sin^2 theta_W anomaly

M. Hirai, S. Kumano, T. -H. Nagai

We investigated a nuclear modification difference between up- and down-valence quark distributions by analyzing structure function F_2 and Drell-Yan cross-section ratios. Although…

hep-lat2004

Anisotropic lattice with nonperturbative accuracy

Hideo Matsufuru, Hidenori Fukaya, Masanori Okawa +2

We determine the nonperturbative anisotropic parameter of the gauge action in the quenched approximation with less than 1% accuracy using the Sommer scale measured by the Lüscher-W…

hep-th2004★ 25 cited

Gaussian expansion analysis of a matrix model with the spontaneous breakdown of rotational symmetry

Jun Nishimura, Toshiyuki Okubo, Fumihiko Sugino

Recently the gaussian expansion method has been applied to investigate the dynamical generation of 4d space-time in the IIB matrix model, which is a conjectured nonperturbative def…

cond-mat.str-el2004★ 19 cited

Magnetic Phase Diagram of the Hole-doped Ca $_{2 - x}$ Na $_{x}$ CuO $_{2}$ Cl $_{2}$ Cuprate Superconductor

K. Ohishi, I. Yamada, A. Koda +6

We report on the magnetic phase diagram of a hole-doped cuprate Ca $_{2 - x}$ Na $_{x}$ CuO $_{2}$ Cl $_{2}$ , which is free from buckling of CuO $_{2}$ planes, determined by muon spin rotation…

hep-ex2004★ 13 cited

Study of the Suppressed Decays $B^{-} \to [K^{+} π^{-}]_{D} K^{-}$ and $B^{-} \to [K^{+} π^{-}]_{D} π^{-}$

M. Saigo

We report a study of the suppressed decays $B^{-} \to [K^{+} π^{-}]_{D} K^{-}$ and $B^{-} \to [K^{+} π^{-}]_{D} π^{-}$ , where $[K^{+} π^{-}]_{D}$ indicates that the $K^{+} π^{-}$ pair originates from a neutral $D$ …

cond-mat.supr-con2004★ 5 cited

Correlation between Superconducting Carrier Density and Transition Temperature in NbB $_{2 + x}$

H. Takagiwa, S. Kuroiwa, M. Yamazawa +5

We report on the magnetic penetration depth, lambda, in a type II superconductor NbB_{2+x} determined by muon spin rotation method. We show in the sample with x=0.1 that lambda at…

hep-th2004★ 12 cited

Wilson Loops and Vertex Operators in Matrix Model

Satoshi Iso, Hidenori Terachi, Hiroshi Umetsu

We systematically construct wave functions and vertex operators in the type IIB (IKKT) matrix model by expanding a supersymmetric Wilson loop operator. They form a massless multipl…

physics.acc-ph2004★ 34 cited

First observation of the acceleration of a single bunch by using the induction device in the KEK Proton Synchrotron

Ken Takayama, Kunio Koseki, Kota Torikai +19

A single RF bunch in the KEK proton synchrotron was accelerated with an induction acceleration method from the injection energy of 500 MeV to 5 GeV.

physics.ins-det2004

New distributed offline processing scheme at Belle

F. J. Ronga, I. Adachi, N. Katayama

The offline processing of the data collected by the Belle detector has been recently upgraded to cope with the excellent performance of the KEKB accelerator. The 127/fb of data (12…

math-ph2004★ 39 cited

Inequivalent quantizations of the three-particle Calogero model constructed by separation of variables

L. Feher, I. Tsutsui, T. Fulop

We quantize the 1-dimensional 3-body problem with harmonic and inverse square pair potential by separating the Schrödinger equation following the classic work of Calogero, but allo…

hep-th2004★ 37 cited

Dynamical generation of a nontrivial index on the fuzzy 2-sphere

Hajime Aoki, Satoshi Iso, Toshiharu Maeda +1

In the previous paper hep-th/0312199 we studied the 't Hooft-Polyakov (TP) monopole configuration in the U(2) gauge theory on the fuzzy 2-sphere and showed that it has a nonzero to…

hep-ph2004★ 46 cited

Higgs Masses in the Minimal SUSY SO(10) GUT

Takeshi Fukuyama, Amon Ilakovac, Tatsuru Kikuchi +2

We explicitly show that minimal SUSY SO(10) Higgs-Higgsino mass matrices evaluated by various groups are mutually consistent and correct. We comment on the corresponding results of…

hep-ph2004★ 20 cited

Nuclear modification difference between u_v and d_v distributions and its relation to NuTeV sin^2 theta_W anomaly

M. Hirai, S. Kumano, T. -H. Nagai

We investigate a possible nuclear correction to the NuTeV measurement of the weak-mixing angle sin^2 theta_W. In particular, a nuclear modification difference between u_v and d_v d…

hep-ph2004★ 21 cited

Perturbative SO(10) Grand Unification

Darwin Chang, Takeshi Fukuyama, Yong-Yeon Keum +2

We consider a phenomenologically viable SO(10) grand unification model of the unification scale $M_{G}$ around $1 0^{16}$ GeV which reproduces the MSSM at low energy and allows pertu…

hep-ex2004★ 139 cited

Observation of an Isotriplet of Excited Charmed Baryons Decaying to $Λ_{c}^{+} π$

R. Mizuk

We report the observation of an isotriplet of excited charmed baryons, decaying into Lambda_c+ pi-, Lambda_c+ pi0 and Lambda_c+ pi+. We measure the mass differences M(Lambda_c+ pi)…

hep-ex2004★ 58 cited

Measurement of the Lifetime Difference Between B_s Mass Eigenstates

D. Acosta

We present measurements of the lifetimes and polarization amplitudes for B_s --> J/psi phi and B_d --> J/psi K*0 decays. Lifetimes of the heavy (H) and light (L) mass eigenstates i…

hep-ex2004★ 58 cited

Observation of B+ --> K1(1270)+ gamma

Heyoung Yang

We report the observation of the radiative decay B+ --> K1(1270)+ gamma using a data sample of 140 fb-1 taken at the Upsilon(4S) resonance with the Belle detector at the KEKB e+e-…

cond-mat.supr-con2004★ 8 cited

Absence of the impurity-induced magnetic order in the electron-doped high-T_c_ cuprates Pr_0.86_LaCe_0.14_Cu_1-y_(Zn, Ni)_y_O_4_

Risdiana, T. Adachi, Y. Koike +2

Zero-field muon-spin-relaxation measurements have been carried out in order to investigate the Zn- and Ni-substitution effects on the Cu-spin dynamics in the electron-doped Pr_0.86…

hep-ph2004★ 170 cited

Electroweak baryogenesis and quantum corrections to the triple Higgs boson coupling

Shinya Kanemura, Yasuhiro Okada, Eibun Senaha

A phenomenological consequence of electroweak baryogenesis is studied in connection with the Higgs physics. In a two Higgs double model, the first order phase transition can be str…