activity
19942004
most citedObservation of Large CP Violation in the Neutral B Meson System

625 citations · 3k across the 20 of their papers we have counts for

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18 papers · 1 filter

hep-ex2004★ 5 cited

Direct Measurements of A_b and A_c using Vertex/Kaon Charge Tags at SLD

SLD Collaboration, K. Abe

Exploiting the manipulation of the SLC electron-beam polarization, we present precise direct measurements of the parity violation parameters A_c and A_b in the Z boson - c quark an…

hep-ex2004★ 154 cited

Evidence for Direct CP Violation in B0 -> K+- pi-+ Decays

Y. Chao

We report evidence for direct CP violation in the decay B0 -> K+-pi-+ with 253/fb of data collected with the Belle detector at the KEKB e+e- collider. Using 275 million B B_bar pai…

hep-ex2002★ 211 cited

Improved Measurement of Mixing-induced CP Violation in the Neutral B Meson System

The Belle Collaboration, K. Abe

We present an improved measurement of the standard model CP violation parameter sin2phi_1 (also known as sin2beta) based on a sample of 85 times 10^6 B Bbar pairs collected at the…

hep-ex2002★ 56 cited

Observation of Mixing-induced CP Violation in the Neutral B Meson System

Belle Collaboration, K. Abe

This report describes an observation of mixing-induced CP violation and a measurement of the CP violation parameter, sin(2phi_1), with the Belle detector at the KEKB asymmetric e+e…

hep-ex2001★ 56 cited

Measurement of the Branching Fraction for B->eta' K and Search for B->eta'pi+

K. Abe

We report measurements for two-body charmless B decays with an eta' meson in the final state. Using 11.1X10^6 BBbar pairs collected with the Belle detector, we find BF(B^+ ->eta'K^…

hep-ex2001★ 625 cited

Observation of Large CP Violation in the Neutral B Meson System

K. Abe, The Belle Collaboration

We present a measurement of the Standard Model CP violation parameter sin 2phi_1 based on a 29.1 fb^{-1} data sample collected at the Upsilon(4S) resonance with the Belle detector…

hep-ex2001★ 27 cited

Observation of B->J/psi K1(1270)

K. Abe, Belle Collaboration

We report the first observation of the exclusive decay process B->J/psi K1(1270) using a sample of 11.2M BBbar meson pairs collected in the Belle detector at the KEKB asymmetric e+…

hep-ex2001★ 81 cited

Measurement of Branching Fractions for B->ππ, Kπand KK Decays

K. Abe

We report measurements of the branching fractions for , , and , and , , and . The results are…

hep-ex2001★ 266 cited

A Measurement of the Branching Fraction for the Inclusive B --> X(s) gamma Decays with the Belle Detector

The Belle Collaboration, K. Abe

We have measured the branching fraction of the inclusive radiative B meson decay B --> X(s) gamma to be Br(B->X(s)gamma)=(3.36 +/- 0.53(stat) +/- 0.42(sys) +0.50-0.54(th)) x 10^{-4…

hep-ex2001★ 22 cited

Measurement of Inclusive Production of Neutral Pions from Upsilon(4S) Decays

Belle Collaboration, K. Abe

Using the Belle detector operating at the KEKB e+e- storage ring, we have measured the mean multiplicity and the momentum spectrum of neutral pions from the decays of the Upsilon(4…

hep-ex2000★ 3 cited

First symmetry tests in polarized Z0 decays to b bbar g

Koya Abe

We have made the first direct symmetry tests in the decays of polarized Z0 bosons into fully-identified b bbar g states, collected in the SLD experiment at SLAC. We searched for ev…

hep-ex1999★ 1 cited

Symmetry Tests in Polarized Z0 Decays to bbg

SLD Collaboration, K. Abe

Angular asymmetries have been measured in polarized Z0 decays to bbg collected by the SLD experiment at the SLC. A high purity bbg event sample is selected by utilizing B lifetime…

hep-ex1998★ 128 cited

Measurements of R=sigma_L/sigma_T for 0.03<x<0.1 and Fit to World Data

E143 collaboration

Measurements were made at SLAC of the cross section for scattering 29 GeV electrons from carbon at a laboratory angle of 4.5 degrees, corresponding to 0.03<x<0.1 and 1.3<Q^2<2.7 Ge…

hep-ex1997★ 83 cited

Measurement of the Neutron Spin Structure Function g2n and Asymmetry A2n

K. Abe

We have measured the neutron structure function g and the virtual photon-nucleon asymmetry A over the kinematic range and $1.0 \leq Q^{2}…

hep-ex1997★ 357 cited

Precision Determination of the Neutron Spin Structure Function g1n

The SLAC E154 Collaboration, K. Abe

We report on a precision measurement of the neutron spin structure function using deep inelastic scattering of polarized electrons by polarized ^3He. For the kinematic rang…

hep-ex1995★ 156 cited

Measurements of the Proton and Deuteron Spin Structure Function g2 and Asymmetry A2

The E143 Collaboration, K. Abe et al

We have measured proton and deuteron virtual photon-nucleon asymmetries A2p and A2d and structure functions g2p and g2d over the range 0.03<x<0.8 and 1.3<Q2<10 (GeV/c)2 by inelasti…

hep-ex1995★ 105 cited

Measurement of alpha_s(M_Z^2) from Hadronic Event Observables at the Z^0 Resonance

K. Abe

The strong coupling alpha_s(M_Z^2) has been measured using hadronic decays of Z^0 bosons collected by the SLD experiment at SLAC. The data were compared with QCD predictions both a…

hep-ex1994★ 117 cited

Precise Measurement of the Left-Right Cross Section Asymmetry in Boson Production by $\ee$ Collisions

The SLD Collaboration

We present a precise measurement of the left-right cross section asymmetry () for boson production by $\ee$ collisions. The measurement was performed at a center-of-mas…