Beyond the Standard Model in B Decays: Three Topics

Abstract

Three new results are discussed: (a) A non-vanishing amplitude for the `wrong sign{'} kaon decay $B\to J/\Psi \bar{K}$ or its CP conjugate is shown to be a necessary condition for obtaining different CP asymmetries in $B\to J/\Psi K_{S,L}$. A significant effect would require a scale of new physics far below the weak scale, all but ruling out this possibility. (b) The leading isospin breaking contributions to the $B\to K^{\ast }\gamma$ decay amplitudes can be calculated in QCD factorization, providing a sensitive probe of the penguin sector of the effective weak Hamiltonian. New physics models which reverse the predicted $10-20$ Standard Model amplitude hierarchy could be ruled out with more precise data. (c) A slowly falling $g^{\ast }g{\eta }^{\prime }$ form factor can be ruled out using the ${\eta }^{\prime }$ spectrum obtained by ARGUS at the ${\rm Y}(1S)$. The decay $b\to sg{\eta }^{\prime }$ is therefore highly suppressed and the origin of the anomalously large $B\to {\eta }^{\prime }{X}_s$ rate remains unknown, perhaps requiring the intervention of New Physics.

12 pages, 3 figures

References in corpus (7)

• The Radiative Decays B -> V gamma at Next-to-Leading Order in QCD
• A Study of Time-Dependent CP-Violating Asymmetries and Flavor Oscillations in Neutral B Decays at the Upsilon(4S)
• Isospin Breaking in B -> K^* gamma Decays
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• B -> V gamma at NLO from QCD Factorization
• Flavor-Change with Ultra-Light Sbottom and Gluinos
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Cited by in corpus (4)

• An Analysis of the Inclusive Decay ${\rm Y}(1S)\to {\eta }^{\prime }X$ and Constraints on the ${\eta }^{\prime }$-Meson Distribution Amplitudes
• The ${\eta }^{\prime }{g}^{\ast }{g}^{(\ast )}$ Vertex Including the ${\eta }^{\prime }$-Meson Mass
• Inclusive eta' Production from the Upsilon(1S)
• Improved Measurement of the Branching Fraction and Energy Spectrum of eta' from Upsilon(1S) Decays