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Showing 1 to 4 of 4 for “"Rare B Decays"”.
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Heavy quark physics on the lattice with improved nonrelativistic actions
… spectrum and of form factors for heavy-to-light decays. In heavy-to-light decays, additional complications arise at high recoil, when the momentum of the light meson reaches a magnitude comparable to the cutoff imposed by the lattice. Discretisation errors at high recoil can be reduced by working …
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Beyond the Standard Model: New scalars and new leptons
… unified theories. Comparing flavor-changing B decays with rare {dollar}\tau{dollar} decays, we find that rare B decays provide the strongest bounds and the most promising decay models are {dollar}B \to K\mu\tau{dollar} and {dollar}B\sb{lcub}s{rcub} \to \mu\tau{dollar}.;If a fourth generation of …
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SEARCH FOR THE RARE DECAY OF A B MESON TO A K MESON AND TWO NEUTRINOS
We search for the exclusive decays B -> (K+,KS,K*+,K*0)nu nubar in a sample of 9.7 million charged and neutral B meson decays recorded by the CLEO detector at the Y(4S)resonance. The technique was one of full event reconstruction where after electing a signal B candidate the remainder of the event …
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Observation of b → dγ decays and determination of |V<sub>td</sub>/V<sub>ts</sub>|
The flavor changing neutral current process b → dγ is a sensitive probe to the Standard Model of elementary particle physics. Using a sample of 386 × 10⁶ B meson pairs accumulated by the Belle detector at the KEKB e⁺e⁻ collider, we measure the branching fractions for the exclusive modes B⁻ → ρ⁻γ, …