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Observation of the decay Upsilon(4S) -> Upsilon(1S) pi+ pi-
The Belle Collaboration
We study transitions between Upsilon states with the emission of charged pions using 477 fb^{-1} of data collected with the Belle detector at the KEKB asymmetric-energy e+ e- colli…
A Search for the Rare Leptonic Decays B+ -> mu+ nu and B+ -> e+ nu
N. Satoyama
We present a search for the decays B+ -> mu+ nu_mu and B+ -> e+ nu_e in a 253 fb-1 data sample collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energ…
Search for Invisible Decay of the
The Belle Collaboration, O. Tajima, H. Hayashii +4
We report results of a search for the invisible decay of the Upsilon(1S) via the Upsilon(3S)->pi+pi-Upsilon(1S) transition using a data sample of 2.9 fb^{-1} at the Upsilon(3S) res…
The first observation of decay
Belle Collaboration
We present the first measurement of tau-decays to hadronic final states with a -meson. This is based on 401.4 fb of data accumulated at the Belle experiment. The branchin…
Search for Neutral Q-balls in Super-Kamiokande II
Kamiokande Collaboration, Y. Takenaga
A search for Q-balls induced groups of successive contained events has been carried out in Super-Kamiokande II with 541.7 days of live time. Neutral Q-balls would emit pions when c…
Observation of B Decays to Two Kaons
S. -W. Lin, P. Chang
Using 449 million BBbar pairs collected with the Belle detector at the KEKB asymmetric-energy e^+e^- collider, we observe clear signals for B^+-> \bar{K}^0 K^+ and B^0-> \bar{K}^0…
Observation of Time-Dependent CP Violation in B0 -> eta' K0 Decays and Improved Measurements of CP Asymmetries in B0 -> phiK0, KsKsKs and B0 -> J/psi K0 Decays
The Belle Collaboration, K. -F. Chen
We present improved measurements of CP-violation parameters in B0->phiK0, eta'K0, KsKsKs decays based on a sample of 535x10^6 BBbar pairs collected at the Y(4S) resonance with the…
On-site underground background measurements for the KASKA reactor-neutrino experiment
H. Furuta, K. Sakuma, M. Aoki +23
On-site underground background measurements were performed for the planned reactor-neutrino oscillation experiment KASKA at Kashiwazaki-Kariwa nuclear power station in Niigata, Jap…
Search for Diffuse Astrophysical Neutrino Flux Using Ultra-High-Energy Upward-Going Muons in Super-Kamiokande I
Kamiokande Collaboration, M. E. C. Swanson
Many astrophysical models predict a diffuse flux of high-energy neutrinos from active galactic nuclei and other extra-galactic sources. At muon energies above 1 TeV, the upward-goi…
Search for Lepton Flavor Violating tau- Decays Including with a K0s Meson
Y. Miyazaki
We have searched for the lepton flavor violating decays $τ^-\to \ell^-\ks$ (), using a data sample of 281 fb collected with the Belle detector at the KEKB $…
Measurement of Forward-Backward Asymmetry and Wilson Coefficients in
A. Ishikawa
We report the first measurement of the forward-backward asymmetry and the ratios of Wilson coefficients and in , where repres…
Evidence for B-> eta' pi and improved measurements for B-> eta' K
The Belle Collaboration, J. Schuemann
We report evidence for exclusive two-body charmless hadronic B meson decays B-> eta' pi, and improved measurements of B-> eta' K. The results are obtained from a data sample of 386…
Improved Constraints on D0-D0bar Mixing in D0 -> K+ pi- Decays from the Belle Detector
L. M. Zhang, Z. P. Zhang, J. Li
We report the results of a search for D0-D0bar mixing in D0 -> K+ pi- decays based on 400 fb^{-1} of data accumulated by the Belle detector at KEKB. Both assuming CP conservation a…
Measurement of the branching fraction, polarization, and CP asymmetry for B0->rho+rho- decays, and determination of the CKM phase phi_2
A. Somov, A. J. Schwartz
We have measured the branching fraction B, longitudinal polarization fraction f_L, and CP asymmetry coefficients A and S for B0->rho+rho- decays with the Belle detector at the KEKB…