We present the results of a study of the charmless vector-vector decay B0→ωK0 with 657×106 BB̅ pairs collected with the Belle detector at the KEKB e+e- collider. We measure the branching fraction to be B(B0→ωK0)=[1.8±0.7(stat)±0.3(syst)]×10-6 with 3.0σ s ...

2008

Observation of B±→ψ(2S)π± and search for direct CP violation

Aurelio Bay, Olivier Schneider, Sun Hee Kim, Tagir Aushev, Mingkui Wang, Chao Wang, Vladislav Balagura, Xiao Wang

We report the first observation of B±→ψ(2S)π±, a Cabibbo- and color-suppressed decay. This analysis is based on 657×106 BB̄ events collected at the Υ(4S) resonance with the Belle detector at the KEKB energy-asymmetric e+e- collider. The measured branching ...

American Physical Society2008

Measurement of B(Ds+→μ+νμ)

Aurelio Bay, Olivier Schneider, Sun Hee Kim, Tagir Aushev, Mingkui Wang, Chao Wang, Vladislav Balagura

We present a measurement of the branching fraction B(Ds+→μ+νμ ) using a 548fb-1 data sample collected by the Belle experiment at the KEKB e+e- collider. The Ds momentum is determined by reconstruction of the system recoiling against DKγX in events of the t ...

2008

Improved measurement of time-dependent CP violation in B0→J/ψπ0 decays

Aurelio Bay, Olivier Schneider, Sun Hee Kim, Tagir Aushev, Chao Wang, Vladislav Balagura, Xiao Wang

American Physical Society2008

Search for a CP asymmetry in Cabibbo-suppressed D0 decays

Aurelio Bay, Olivier Schneider, Sun Hee Kim, Tagir Aushev, Chao Wang, Xiao Wang

We measure the CP-violating asymmetries in decays to the D0 → K+ K- and D0 → π+ π- CP eigenstates using 540 fb-1 of data collected with the Belle detector at or near the Υ{hooked} (4 S) resonance. Cabibbo-favored D0 → K- π+ decays are used to correct for s ...

2008

Study of B→D**lν with full reconstruction tagging

Aurelio Bay, Olivier Schneider, Tagir Aushev, Mingkui Wang, Stewart Cole, Chao Wang, Vladislav Balagura, Xiao Wang

American Physical Society2008

Experimental constraints on the spin and parity of the Λc(2880)+

Aurelio Bay, Olivier Schneider, Tagir Aushev, Stewart Cole, Chao Wang, Vladislav Balagura, Lei Zhang

We report the results of several studies of the Λc+π+π-X final state in continuum e+e- annihilation data collected by the Belle detector. An analysis of angular distributions in Λc(2880)+→Σc(2455)0, ++π+,- decays strongly favors a Λc(2880)+ spin assignment ...

2007

A study of γ γ → KS 0 KS 0 production at energies from 2.4 to 4.0 GeV at Belle

Aurelio Bay, Olivier Schneider, Mingkui Wang, Chao Wang

KS 0 KS 0 production in two-photon collisions has been studied using a 397.6 fb-1 data sample collected with the Belle detector at the KEKB e+ e- collider. For the first time the cross sections are measured in the two-photon center-of-mass energy range bet ...

2007

Measurement of Einstein-Podolsky-Rosen-Type Flavor Entanglement in Υ(4S)→B0B¯0 Decays

Christian Jacoby, Jean Wicht, Aurelio Bay, Olivier Schneider, Sun Hee Kim, Tagir Aushev, Mingkui Wang, Stewart Cole, Chao Wang

2007

Study of B̄0→D0π+π- decays

Aurelio Bay, Olivier Schneider, Tagir Aushev, Mingkui Wang, Chao Wang, Vladislav Balagura, Lei Zhang

We report the results of a study of neutral B meson decays to the D0π+π- final state, where the D0 is fully reconstructed. The results are obtained from an event sample containing 388×106 BB̄-meson pairs collected in the Belle experiment at the KEKB e+e- c ...

American Physical Society2007

Study of inclusive strange-baryon production and search for pentaquarks in two-photon collisions at LEP

Eduardo Sanchez, Horst Vogel, Aurelio Bay, Jian Zhao, Liang Sun, Qian Wang, Zhirui Xu, Matthias Weber, Ji Hyun Kim, Werner Lustermann, Xiao Wang, Zheng Wang

2007

Search for lepton flavor violating τ- decays into ℓ- η, ℓ- η′ and ℓ- π0

Aurelio Bay, Olivier Schneider, Chao Wang

We have searched for lepton-flavor-violating τ decays with a pseudoscalar meson (η, η′ and π0) using a data sample of 401 fb-1 collected with the Belle detector at the KEKB asymmetric-energy e+ e- collider. No evidence for these decays is found and we set ...

2007

Observation of the decay B̄0→Ds+Λp̄

Aurelio Bay, Olivier Schneider, Tagir Aushev, Stewart Cole, Chao Wang, Vladislav Balagura

We report the first observation of the decay B̄0→Ds+Λ p̄ with a statistical significance of 6.6σ. We measure B(B̄0→Ds+Λp̄)=(2.9±0.7±0.5±0.4) ×10-5, where the first error is statistical, the second is systematic, and the third error comes from the uncertain ...

American Physical Society2007

Search for B+→J/ψη′K+ and B0→J/ψη′KS0 decays

Aurelio Bay, Olivier Schneider, Tagir Aushev, Mingkui Wang, Stewart Cole, Chao Wang, Vladislav Balagura, Lei Zhang

We report the results of searches for B+→J/ψη′K+ and B0→J/ψη′KS0 decays, using a sample of 388×106 BB̄ pairs collected with the Belle detector at the Υ(4S) resonance. No statistically significant signal is found for either of the two decay modes and upper ...

American Physical Society2007

High Statistics Measurement of the Cross Sections of γγ→π

Aurelio Bay, Olivier Schneider, Sun Hee Kim, Tagir Aushev, Chao Wang, Vladislav Balagura, Jing Li

2007

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