Probing new physics in B -> phi pi decay

Abstract

We analyze the rare decay mode $B\to \varphi \pi$, which is a pure penguin induced process, receiving dominant contribution from the electroweak penguins. Thus the standard model branching ratio is expected to be very small, which makes it as a sensitive probe of new physics. Using QCD factorization approach, we find the branching ratio in the standard model as $Br(B^{-}\to \varphi {\pi }^{-})\simeq 5\times 10^{-9}$. Exploring some of the beyond standard model scenarios the branching ratio is found to be $\sim \mathcal{O}(10^{-8})$ in the minimal supersymmetric standard model (MSSM) with mass insertion approximation and in the extended technicolor model (TC2). The existence of an extra vector-like down quark (VLDQ) model predicts it to be $\sim \mathcal{O}(10^{-7})$. The recent BaBar result on $B^0\to \varphi {\pi }^0$ might be a strong indication of new physics effect present in the penguin induced process $B\to \varphi \pi$.

Latex, 12 pages, references added, to appear in Phys. Lett. B

References in corpus (3)

• New physics effects on the CP asymmetries in B -> phi K_S and B -> eta' K_S decays
• Testing QCD factorisation and charming penguins in charmless $\mathbf{B}\to \mathbf{PV}$
• Measurements of branching fractions in B -> phi K and B -> phi pi and search for direct CP violation in B+/- -> phi K+/-

Cited by in corpus (9)

• Observation of the Decay B+ --> K+K-pi+
• Implications of the non-universal Z boson in FCNC mediated rare decays
• Effect of FCNC mediated Z boson on lepton flavor violating decays
• Probing the unparticle signal in $b\to d$ penguin processes
• Revisiting B->phi pi Decays in the Standard Model
• Signature of new physics in B -> phi pi decay
• Probing new physics in $B\to J/\Psi {\pi }^0$ decay
• Search for new physics from $B\to \pi \varphi$
• Scrutinizing new physics of $B_d\to \varphi ({\eta }^{{(}^{\prime })},\pi ,\omega )$ decay modes