Yu Watanabe

activity

19982018

most citedEvidence for oscillation of atmospheric neutrinos

5.1k citations · 10.5k across the 73 of their papers we have counts for

collaborators

73 papers

hep-ex2018★ 11 cited

First evidence for $cos 2 β > 0$ and resolution of the CKM Unitarity Triangle ambiguity by a time-dependent Dalitz plot analysis of $B^{0} \to D^{(*)} h^{0}$ with $D \to K_{S}^{0} π^{+} π^{-}$ decays

The BaBar, Belle Collaborations, : +422

We present first evidence that the cosine of the CP-violating weak phase $2 β$ is positive, and hence exclude trigonometric multifold solutions of the CKM Unitarity Triangle using a…

hep-ex2016★ 10 cited

Search for the decay B0 -> phi gamma

Belle Collaboration, Z. King, B. Pal +167

We have searched for the decay B0 -> phi gamma using the full Belle data set of 772 x 10^6 BBbar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB e+…

hep-ex2015★ 26 cited

Measurement of D0-D0bar mixing and search for CP violation in D0 -> K+K-, pi+pi- decays with the full Belle data set

Belle Collaboration

We report an improved measurement of D0-D0bar mixing and a search for CP violation in D0 decays to CP-even final states K+K- and pi+pi-. The measurement is based on the final Belle…

hep-ex2014★ 427 cited

The Physics of the B Factories

A. J. Bevan, B. Golob, Th. Mannel +2003

This work is on the Physics of the B Factories. Part A of this book contains a brief description of the SLAC and KEK B Factories as well as their detectors, BaBar and Belle, and da…

hep-ex2013★ 96 cited

Measurement of the Branching Fraction Br(Lambda_c+ -> p K- pi+)

A. Zupanc, C. Bartel, N. Gabyshev +184

We present the first model-independent measurement of the absolute branching fraction of the Lambda_c+ -> p K- pi+ decay using a data sample of 978 fb^-1 collected with the Belle d…

hep-ex2011★ 610 cited

Observation of two charged bottomonium-like resonances in Y(5S) decays

the Belle Collaboration

We report the observation of two narrow structures in the mass spectra of the pi+-Y(nS) (n=1,2,3) and pi+-hb(mP)(m$ (m=1,2) pairs that are produced in association with a single cha…

hep-ex2011★ 45 cited

Search for Lepton-number-violating B+->D-l+l'+ Decays

O. Seon, Y. J. Kwon, T. Iijima

We perform the first search for lepton-number-violating B+->D-l+l'+ decays, where l and l' stand for e or mu, using 772 x 10^6 BB-bar pairs accumulated at the Upsilon(4S) resonance…

hep-ex2011★ 13 cited

Observation of $D^{+} \to K^{+} η^{(')}$ and Search for CP Violation in $D^{+} \to π^{+} η^{(')}$ Decays

E. Won, B. R. Ko

We report the first observation of the doubly Cabibbo-suppressed decays $D^{+} \to K^{+} η^{(')}$ using a 791 fb $^{- 1}$ data sample collected with the Belle detector at th…

hep-ex2011★ 150 cited

Observation of $X (3872) \to J / ψ γ$ and search for $X (3872) \to ψ^{'} γ$ in B decays

V. Bhardwaj, K. Trabelsi, J. B. Singh +2

We report a study of $B \to (J / ψ γ) K$ and $B \to (ψ^{'} γ) K$ decay modes using $772 \times 1 0^{6}$ $B B ˉ$ events collected at the Υ(4S)$ resonance with the Belle detector at the KEKB…

hep-ex2011★ 152 cited

First observation of the P-wave spin-singlet bottomonium states h_b(1P) and h_b(2P)

Belle Collaboration

We report the first observation of the spin-singlet bottomonium states h_b(1P) and h_b(2P) produced in the reaction e+e- --> hb(nP)pi+pi- using a 121.4fb-1 data sample collected at…

hep-ex2011★ 60 cited

Observation of $B_{s}^{0} \to J / ψ f_{0} (980)$ and Evidence for $B_{s}^{0} \to J / ψ f_{0} (1370)$

Jin Li

We report the first observation of $B_{s}^{0} \to J / ψ f_{0} (980)$ and first evidence for $B_{s}^{0} \to J / ψ f_{0} (1370)$ , which are CP eigenstate decay modes. These results are obtained from $121.…

hep-ex2011★ 14 cited

Search for CP Violation in the Decays $D^{0} \to K_{S}^{0} P^{0}$

B. R. Ko, E. Won

We have searched for CP violation in the decays $D^{0} \to K_{S}^{0} P^{0}$ where $P^{0}$ denotes a neutral pseudo-scalar meson which is either a $π^{0}$ , $η$ , or $η^{'}$ using KEKB asymme…

hep-ex2010★ 46 cited

Search for leptonic decays of D0 mesons

M. Petrič, M. Starič

We search for the flavor-changing neutral current decays D0\to mu+mu- and D0\to e+e-, and for the lepton-flavor violating decays D0\to e\pm mu\mp using 660 fb^-1 of data collected…

hep-ex2010★ 19 cited

Search for $B^{0} \to K^{* 0} K^{* 0}$ , $B^{0} \to K^{* 0} K^{* 0}$ and $B^{0} \to K^{+} π^{-} K^{\mp} π^{\pm}$ Decays

C. -C. Chiang

We report a search for the decays $B^{0} \to K^{* 0} K^{* 0}$ and $B^{0} \to K^{* 0} K^{* 0}$ . We also measure other charmless decay modes with $K^{+} π^{-} K^{-} π^{+}$ and $K^{+}π^{-}K^{…

hep-ex2010★ 37 cited

Measurement of the branching fractions and the invariant mass distributions for tau^- -> h^-h^+h^-nu_tau decays

M. J. Lee

We present a study of tau->pipipinu, tau->Kpipinu, tau->KKpinu, and tau->KKKnu decays using a 666 fb-1 data sample collected with the Belle detector at the KEKB asymmetric-energy e…

hep-ex2009★ 149 cited

Observation of a charmonium-like enhancement in the gamma gamma --> omega J/psi process

The Belle Collaboration, S. Uehara

We report the results of a search for a charmonium-like state produced in the process gamma gamma --> omega J/psi in the 3.9-4.2 GeV/c^2 mass region. We observe a significant enhan…

hep-ex2009★ 131 cited

Evidence for a new resonance and search for the Y(4140) in $γ γ \to ϕ J / ψ$

The Belle Collaboration, C. P. Shen

The process $γγ\to ϕ\jpsi$ is measured for $ϕ\jpsi$ masses between threshold and 5 GeV/ $c^{2}$ , using a data sample of 825 fb $^{- 1}$ collected with the Belle detector. A narrow…

hep-ex2009★ 43 cited

Measurement Of |V_ub| From Inclusive Charmless Semileptonic B Decays

The Belle Collaboration

We present the partial branching fraction for inclusive charmless semileptonic B decays and the corresponding value of the CKM matrix element |Vub|, using a multivariate analysis m…

hep-ex2009★ 8 cited

Measurement of cross sections of exclusive $e^{+} e^{-} \to V P$ processes at $s = 10.58$ GeV

K. Belous, M. Shapkin

The cross sections for the reactions $e^{+} e^{-} \to ϕ η, ϕ η^{'}, ρ η, ρ η^{'}$ have been measured using a data sample of 516 fb $^{- 1}$ collected with the Belle detector at th…

hep-ex2009★ 8 cited

Search for the X(1812) in $B^{\pm} \to K^{\pm} ω ϕ$

The Belle Collaboration, C. Liu, Z. P. Zhang

We report on a search for the X(1812) state in the decay $B^{\pm} \to K^{\pm} ω ϕ$ with a data sample of $657 \times 1 0^{6}$ $B B ˉ$ pairs collected with the Belle detector at the KE…

hep-ex2009★ 11 cited

Observation of the Doubly Cabibbo-Suppressed Decay $D_{s}^{+} \to K^{+} K^{+} π^{-}$

Belle Collaboration, B. R. Ko, E. Won

We report the first observation of the doubly Cabibbo-suppressed decay $D_{s}^{+} \to K^{+} K^{+} π^{-}$ using 605 fb $^{- 1}$ of data collected with the Belle detector at the KEKB asymmetric-ene…

hep-ex2009★ 5 cited

Evidence of time-dependent CP violation in the decay B0 to D+D-

K. Vervink, T. Aushev, O. Schneider

We report a measurement of the CP-odd fraction and the time-dependent CP violation in B0 to D*+D*- decays, using 657.10^6 BBbar events collected at the Upsilon(4S) resonance with t…

hep-ex2008★ 84 cited

First Study of Neutron Tagging with a Water Cherenkov Detector

Kamiokande Collaboration, H. Watanabe, H. Zhang

A first study of neutron tagging is conducted in Super--Kamiokande, a 50,000-ton water Cherenkov detector. The tagging efficiencies of thermal neutrons are evaluated in a 0.2 % GdC…

hep-ex2008★ 229 cited

Observation of two resonance-like structures in the pi+ chi_c1 mass distribution in exclusive B0-bar --> K- pi+ chi_c1 decays

R. Mizuk, R. Chistov

We report the first observation of two resonance-like structures in the pi+ chi_c1 invariant mass distribution near 4.1 GeV/c^2 in exclusive B0-bar --> K- pi+ chi_c1 decays. From a…

First evidence for cos2β>0 and resolution of the CKM Unitarity Triangle ambiguity by a time-dependent Dalitz plot analysis of B0→D(∗)h0 with D→KS0​π+π− decays