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Tagir Aushev

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Related publications (404)

Observation of a Resonancelike Structure in the π+-ψ′ Mass Distribution in Exclusive B→Kπ+-ψ′ Decays

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

2008

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

Evidence for D0-D̄0 mixing

Jean Wicht, Aurelio Bay, Olivier Schneider, Sun Hee Kim, Tagir Aushev, Mingkui Wang, Stewart Cole, Chao Wang, Yuan Yuan, Vladislav Balagura, Lei Zhang, Jing Li

We observe evidence for D0-D̄0 mixing by measuring the difference in the apparent lifetime when a D0 meson decays to the CP eigenstates K+K- and π+π- and when it decays to the final state K-π+. We find the relative difference of the lifetimes yCP to be [1. ...

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

Search for b→h(*)νν̄ decays at belle

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

We present a search for the rare decays B→h()νν̄, where h() stands for a light meson. A data sample of 535×106 BB̄ pairs collected with the Belle detector at the KEKB e+e- collider is used. Signal candidates are required to have an accompanying B meson f ...

2007

Measurements of branching fractions and q2 distributions for B → π ℓ ν and B → ρ ℓ ν decays with B → D(*) ℓ ν decay tagging

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

We report measurements of the charmless semileptonic decays B0 → π- / ρ- ℓ+ ν and B+ → π0 / ρ0 ℓ+ ν, based on a sample of 2.75 × 108B over(B, ̄) events collected at the Υ{hooked} (4 S) resonance with the Belle detector at the KEKB e+ e- asymmetric collider ...

2007

Moments of the electron energy spectrum and partial branching fraction of B→Xceν decays at the Belle detector

Olivier Schneider, Sun Hee Kim, Tagir Aushev, Stewart Cole, Chao Wang, Lei Zhang, Jing Li

We report a measurement of the inclusive electron energy spectrum for charmed semileptonic decays of B mesons in a 140fb-1 data sample collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric energy e+e- collider. We determine the fi ...

American Physical Society2007

Measurement of branching fraction and time-dependent CP asymmetry parameters in B-0 ->(D+D-KS0) decays

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

We present a measurement of the branching fraction and time-dependent CP violation parameters for B-0 ->(D*+D*-KS0) decays. These results are obtained from a 414 fb(-1) data sample that contains 449x10(6) B (B) over bar pairs collected at the Upsilon(4S) r ...

American Physical Society2007

Measurement of the τ lepton mass and an upper limit on the mass difference between τ+ and τ-

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

The mass of the τ lepton has been measured in the decay mode τ→3πντ using a pseudomass technique. The result obtained from 414fb-1 of data collected with the Belle detector is Mτ=[1776.61±0. 13(stat)±0.35(sys)]MeV/c2. The upper limit on the relative mass d ...

2007

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

Study of the charmed baryonic decays B̄0→Σc++p̄π- and B̄0→Σc0p̄π+

Olivier Schneider, Sun Hee Kim, Tagir Aushev, Mingkui Wang, Stewart Cole, Chao Wang, Lei Zhang, Jing Li

We study the three-body charmed baryonic decays B̄0→Σ c++p̄π- and B̄0→Σc0p̄π+ in the four-body final state B̄0→Λc+p̄π+π-, using a data sample of 357fb-1 accumulated at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. ...

American Physical Society2007

Improved measurement of CP-violating parameters in B→ρ+ρ- decays

Olivier Schneider, Tagir Aushev, Mingkui Wang, Stewart Cole, Chao Wang

We present a measurement of the CP-violating asymmetry in B0→ρ+ρ- decays using 535×106 BB̄ pairs collected with the Belle detector at the KEKB e+e- collider. We measure CP-violating coefficients A=0.16±0.21(stat)±0.08(syst) and S=0.19±0. 30(stat)±0.08(syst ...

American Physical Society2007

Observation of direct CP violation in B0→π+π- decays and model-independent constraints on the quark-mixing angle 2

Olivier Schneider, Tagir Aushev, Mingkui Wang, Stewart Cole, Chao Wang, Lei Zhang

We report a new measurement of the time-dependent CP-violating parameters in B0→π+π- decays with 535×106 BB̄ pairs collected with the Belle detector at the KEKB asymmetric-energy e+e- collider operating at the Υ(4S) resonance. We find 1464±65 B0→π+π- event ...

2007

Measurement of inclusive Ds, D0, and J/ψ rates and determination of the Bs()B̄s() production fraction in bb̄ events at the Υ(5S) resonance

Olivier Schneider, Sun Hee Kim, Tagir Aushev, Stewart Cole, Chao Wang, Lei Zhang, Jing Li

The inclusive production of Ds, D0, and J/ψ mesons is studied using a 1.86fb-1 data sample collected on the Υ(5S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. The number of bb̄ events in this Υ(5S) data sample is determine ...

2007

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

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Tagir Aushev

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Observation of a Resonancelike Structure in the π+-ψ′ Mass Distribution in Exclusive B→Kπ+-ψ′ Decays

Observation of the decay B̄0→Ds+Λp̄

Evidence for D0-D̄0 mixing

Study of B̄0→D0π+π- decays

Search for b→h(*)νν̄ decays at belle

Measurements of branching fractions and q2 distributions for B → π ℓ ν and B → ρ ℓ ν decays with B → D(*) ℓ ν decay tagging

Moments of the electron energy spectrum and partial branching fraction of B→Xceν decays at the Belle detector

Measurement of branching fraction and time-dependent CP asymmetry parameters in B-0 ->(D+D-KS0) decays

Measurement of the τ lepton mass and an upper limit on the mass difference between τ+ and τ-

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

Study of the charmed baryonic decays B̄0→Σc++p̄π- and B̄0→Σc0p̄π+

Improved measurement of CP-violating parameters in B→ρ+ρ- decays

Observation of direct CP violation in B0→π+π- decays and model-independent constraints on the quark-mixing angle 2

Measurement of inclusive Ds, D0, and J/ψ rates and determination of the Bs()B̄s() production fraction in bb̄ events at the Υ(5S) resonance

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

Study of B+→pΛ¯γ, pΛ¯π0 and B0→pΛ¯π-

High Statistics Measurement of the Cross Sections of γγ→π

Observation of a Charmoniumlike State Produced in Association with a J/ψ in e+e- Annihilation at s≈10.6 GeV

Improved measurement of B¯0→Ds-D+ and search for B¯0→Ds+Ds- at Belle

Measurement of the Near-Threshold e+e-→D()±D()∓ Cross Section using Initial-State Radiation