Direct CP violation and new physics effects in the decay mode B^+ -> phi K^+

Abstract

We study the direct CP violation effect in the decay mode $B^{+}\to \varphi K^{+}$. This decay mode is dominated by the loop induced $\bar{b}\to \bar{s}s\bar{s}$ penguin diagram with a tiny contribution from annihilation diagram. Therefore, the standard model expectation of direct CP violation is negligibly small. Using QCD factorization approach we find the CP asymmetry in the standard model to be at percent level. We consider then two scenarios beyond the standard model, the model with an extra vector like down quark (VLDQ) and the R-parity violating supersymmetric model (RPV) and show that the direct CP violating asymmetry in $B^{+}\to \varphi K^{+}$ could be as large as ~85% (70%) in VLDQ (RPV) model.

17 pages, 2 figures, typos corrected, more references added, to be published in Modern Physics Letters A

References in corpus (4)

• QCD factorization for B->PP and B->PV decays
• Measurement of Branching Fractions and Polarization in B -> phi K^{(*)} Decays
• New physics effects on the CP asymmetries in B -> phi K_S and B -> eta' K_S decays
• Results on the CKM angle {${\varphi }_1$ $(\beta )$}

Cited by in corpus (5)

• Implications of the non-universal Z boson in FCNC mediated rare decays
• CP Asymmetries of $B\to \varphi K$ and $B\to {\eta }^{(\prime )}K$ Decays Using a Global Fit in QCD Factorization
• Effect of FCNC mediated Z boson on lepton flavor violating decays
• $B_s^0-{\bar{B}}_s^0$ mixing and $b\to s$ transitions in isosinglet down quark model
• Signature of new physics in B -> phi pi decay