منابع مشابه
Precise measurement of Γ ( K → eν ( γ ) ) / Γ ( K → μ ν ( γ ) ) and study of K →
We present a precise measurement of the ratio RK = Γ(K → eν(γ))/Γ(K → μν(γ)) and a study of the radiative process K → eνγ, performed with the KLOE detector. The results are based on data collected at the Frascati ee collider DAΦNE for an integrated luminosity of 2.2 fb. We find RK = (2.493 ± 0.025stat ± 0.019syst) × 10 , in agreement with the Standard Model expectation. This result is used to i...
متن کامل1 B → K ∗ γ decay on APE ∗
We present results for the radiative decay B → K * γ, obtained by using the Clover action at β = 6.0 on APE. The compatibility between the scaling laws predicted by the Heavy Quark Effective Theory (HQET) and pole dominance is discussed. The final result depends crucially on the assumed q 2-dependence of the form factors.
متن کاملMeasurement of Γ ( K S → π + π − ( γ ) ) / Γ ( K S → π 0 π 0 )
We have measured the ratio R S = Γ(KS → π π(γ))/Γ(KS → π π) with the KLOE detector at the DAΦNE ee collider. This measurement is fully inclusive with respect to the ππγ final state. The sample of over 10 two-pion decays of tagged KS mesons allows a statistical error as low as ∼ 0.1% to be obtained. The accuracy is limited by systematic uncertainties, which are estimated primarily from data. We ...
متن کاملNotes on B → K ∗ γ
We analyzed two form factors T1(q ) and T2(q ) which enter the B → Kll decay rate and are accessible in the lattice calculations for B → Kγ. The extrapolation to q = 0, necessary for B → Kγ is examined. The flat behavior of T2(q) is shown to be disfavored. From the double constrained unitarity bounds by the lattice result at small recoil and the light cone sum rule one at large recoil, the pole...
متن کامل399 ITMB_v2.indd
A cluster of papers in this month’s Bulletin describes the facets of maternal and congenital syphilis and lists the current barriers to effective control and treatment. Bidia Deperthes et al. (pp. 410–416) describe antenatal syphilis control programmes in Bolivia, Kenya and South Africa, and outline ways to improve the effectiveness of these programmes. Sarah Hawkes et al. (pp. 417–423) take a ...
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ژورنال
عنوان ژورنال: The Mathematical Gazette
سال: 1913
ISSN: 0025-5572,2056-6328
DOI: 10.2307/3603308