A Critical Study of the B -> K πPuzzle

Abstract

In the light of new experimental results on B -> K pi decays, we critically study the decay processes B -> K pi in a phenomenological way. Using the quark diagram approach and the currently available data, we determine the allowed values of the relevant theoretical parameters, corresponding to the electroweak (EW) penguin, the color-suppressed tree contribution, etc. In order to find the most likely values of the parameters in a statistically reliable way, we use the chi^2 minimization technique. Our result shows that the current data for B to K pi decays strongly indicate (large) enhancements of both the EW penguin and the color-suppressed tree contributions. In particular, the color-suppressed tree effect needs to be enhanced by about an order of magnitude to fit the present data.

19pages, 5 figures, The study of sensitivity on r_C, r_EW is added

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Cited by in corpus (39)

• Two body B decays with isosinglet final states in SCET
• Revisiting Charmless Hadronic B_{u,d} Decays in QCD Factorization
• Evidence for Direct CP Violation from Dalitz-plot analysis of B+/- -> K+/- pi+/- pi-/+
• Enhanced KL to pi0 nu nubar from Direct CP Violation in B to K pi with Four Generations
• Nonuniversal $Z^{\prime }$ couplings in B decays
• B_s^0 - \bar{B}_s^0 Mixing in Leptophobic Z^\prime Model
• Constraints on the nonuniversal Z^\prime couplings from B\toπK, πK^{\ast} and ρK Decays
• Flavor SU(3) symmetry and QCD factorization in $B\to PP$ and $PV$ decays
• B_s -> phi rho^0 and B_s -> phi pi^0 as a handle on isospin-violating New Physics
• Four Generation CP Violation in B -> phi K^0, pi^0 K^0, eta' K^0 and Hadronic Uncertainties
• Resolving B-CP Puzzles in QCD Factorization
• $B_s$ Mixing and New Physics in hadronic $b\to s\bar{q}q$ transitions
• The 2-3 symmetry: Flavour Changing $b$, $\tau$ Decays and Neutrino Mixing
• Exclusive B-> M ν\barν (M= π, K, ρ, K^*) Decays and Leptophobic Z^\prime Model
• Searching for New Physics in b to s Hadronic Penguin Decays
• Searching For New Physics With B to K pi Decays
• The $B\to K\pi$ Puzzle and Supersymmetric Models
• B_s^0-\bar{B}_s^0 mixing and B -> πK decays in stringy leptophobic Z^\prime
• Resolving the $B\to K\pi$ puzzle by Glauber-gluon effects
• Analytic Resolution of Puzzle in $B\to K\pi$ decays
• New physics in $B\to \pi \pi$ and $B\to \pi K$ decays
• Constraints on the anomalous tensor operators from B\toϕK^{\ast}, ηK^{\ast}$ and ηK decays
• $B_s-{\bar{B}}_s$ Mixing and Its Implication for $b\to s$ Transitions in Supersymmetry
• Supersymmetric Contributions to Bs->K+K-
• $B_s({\bar{B}}_s)$ -> $D_{CP}^{0}K\bar{K}$: Detecting and Discriminating New Physics in $B_s$-${\bar{B}}_s$ Mixing
• Implications of new data in charmless B decays
• B -> K pi Puzzle and New Sources of CP Violation in Supersymmetry
• Generalized analysis on $B\to K^{\ast }\rho$ within and beyond the Standard Model $-$ Can it help understand the $B\to K\pi$ puzzle?
• Tree FCNC and non-unitarity of CKM matrix
• A simultaneous explanation of the large phase in B_s-\bar B_s mixing and B --> ππ/ πK puzzles in R-parity violating supersymmetry
• Patterns of New Physics in B Decays
• Branching ratio and $CP$ violation of $B\to K\pi$ decays in a modified perturbative QCD approach
• $B_{d,s}^0\to f_1{f}_1$ decays with $f_1(1285)-f_1(1420)$ mixing in the perturbative QCD approach
• A solution to B --> pi pi puzzle and B --> K K
• The B ---> π K puzzle and the Bulk Randall-Sundurm model
• The B-CP Puzzles in QCD Factorization
• Annihilation Contributions and CP Asymmetries in $B^{+}\to {\pi }^{+}{K}^0,K^{+}{K}^0$ and $B^0\to K^0{\bar{K}}^0$
• Electroweak Penguin and Leptophobic $Z^{\prime }$ model
• Phenomenological analysis of charmless $B\to PV$ decays in the modified perturbative QCD approach