Understanding B -->J/Ψφin the Standard Model

Details Understanding B -->J/Ψφin the Standard Model Understanding B -->J/Ψφin the Standard Model

2009-01-19

arxiv.org/abs/0901.2782v2

Phys.Lett.B677:278-281,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, 3 figures, some typos are corrected, version for publish in PLB

Scientific paper

10.1016/j.physletb.2009.05.037

The rare decay $\bar B_d^0\to J/\psi \phi$ can proceed in four distinct mechanisms: (i) production of the $\phi$ via tri-gluon fusion, (ii) photoproduction of the $J/\psi$ or $\phi$, (iii) final-state rescattering of $D_s^{(*)}D_s^{(*)}$ produced in the $\bar B_d$ decay to $J/\psi\phi$, and (iv) production of the $\phi$ via $\omega-\phi$ mixing. In this work, we examine the contributions from photoproduction and final-state rescattering to $\bar B_d^0\to J/\psi \phi$ and find that the corresponding branching ratios are of order $10^{-11}$ and $10^{-9}$, respectively. Hence, this decay is dominated by the $\omega-\phi$ mixing effect.

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