منابع مشابه
Recent Charmonium Results from BES
The ψ(2S) → τ+τ− branching ratio, Bττ , has been measured for the first time using the BES detector at the Beijing Electron Positron Collider. The result is Bττ = 2.71 ± 0.43 ± 0.55) × 10−3. Using both the J/ψ and ψ(2S) BESI data sets, we have determined the ηc mass and width to be MηC = (2975 ± 3.9 ± 1.2) MeV and ΓηC = (11.0± 8.1± 4.1) MeV. Some preliminary results from the recently completed ...
متن کاملRecent Charmonium Physics from BES
Measurements of branching fractions for ψ(2S) decays into ωππ, b1π, ωf2(1270), ωKK, ωpp̄, φππ, φf0(980), φK K, and φpp̄ final states, based on a data sample of (4.02 ± 0.22) × 10 ψ(2S) events collected with the BESI detector at the Beijing ElectronPositron Collider, are reported. Using the same event sample, radiative decays of the radially excited charmonium resonance, ψ(2S), into ππ, KK and ηη ...
متن کاملSubcontracted Rational SFE
In their paper, “Rational Secure Computation and Ideal Mechanism Design,” Izmalkov, Lepinski and Micali show that any one-shot mediated game can be simulated by the players themselves, without the help of a trusted mediator, using physical envelopes and a ballot-box. We show that communication between the players is not essential to the ILM protocol. That is, we provide a protocol for rational ...
متن کامل(BES Collaboration) †
BES data on J/ψ → γ(KK Sπ) are presented. There is a strong peak due to η(1440)/ι, which is fitted with a Breit-Wigner amplitude with s-dependent widths for decays to KK, κK, ηππ and ρρ; κ refers to the Kπ S-wave. At a KK̄π mass of ∼ 2040 MeV, there is a second peak with width ∼ 400 MeV; J = 0 is preferred over 1 and 2 respectively by 5.2 and 6.8 standard deviations. It is a possible candidate f...
متن کاملResults and Future Plans from Bes
The values of R = σ(ee → hadrons)/σ(ee → μμ) for 85 center-of-mass energies between 2 and 5 GeV are reported. Preliminary results using partial wave analysis for J/ψ decays to γππ, γKK, φππ and φKK are presented. The BESIII/BEPCII, a project for the future of BES, is introduced. 1 PRESENT STATUS OF BESII/BEPC The Beijing Spectrometer (BES) at Beijing Electron Positron Collider (BEPC), so far th...
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ژورنال
عنوان ژورنال: Nature Reviews Endocrinology
سال: 2018
ISSN: 1759-5029,1759-5037
DOI: 10.1038/s41574-018-0139-5