Improved measurement ofB¯0→Ds−D+and search forB¯0→Ds+Ds−at Belle
نویسندگان
چکیده
منابع مشابه
Search for pentaquarks at Belle
Abstract We search for the strange pentaquark Θ+ using kaon interactions in the material of the Belle detector. No signal is observed in the pKS final state, while in the pK − final state we observe ∼ 1.6 · 104 Λ(1520) → pK decays. We set an upper limit on the ratio of Θ+ to Λ(1520) yields σ(Θ+)/σ(Λ(1520)) < 2% at 90% CL, assuming that the Θ+ is narrow. We also report on searches for strange an...
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A high precision study of the process γγ → pp has been performed using a data sample of 89 fb−1 collected with the Belle detector at the KEKB e+e− collider. The cross section of pp production has been measured at two-photon center-ofmass (c.m.) energies between 2.025 and 4.0 GeV and in the c.m. angular range of | cos θ∗| < 0.6. Production of γγ → ηc → pp is observed and the product of the two-p...
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In the Standard Model, the violation of the CP symmetry by the weak interaction is possible via the complex phase in the CKM mass mixing matrix. This phase can be extracted by observing processes that involve flavor transitions spanning the three quark generations. In this analysis we consider decays of the neutral B meson to final states which are CP eigenstates. The interference between the w...
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The lifetimes of charmed mesons have been measured using 2.75 fb of data collected with the Belle detector at KEKB. Each candidate is fully reconstructed to identify the flavor of the charmed meson. The lifetimes are measured to be τ(D) = (414.8±3.8±3.4) fs, τ(D) = (1040 −22 ± 18) fs and τ(D + s ) = (479 +17 −16 +6 −8) fs, where the first error is statistical and the second error is systematic....
متن کاملMeasurement of γγ → pp production at Belle
A high precision study of the process γγ → pp has been performed using a data sample of 89 fb−1 collected with the Belle detector at the KEKB e+e− collider. The cross section of pp production has been measured at two-photon center-ofmass (c.m.) energies between 2.025 and 4.0 GeV and in the c.m. angular range of | cos θ∗| < 0.6. Production of γγ → ηc → pp is observed and the product of the two-p...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2007
ISSN: 1550-7998,1550-2368
DOI: 10.1103/physrevd.75.091102