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Large electroweak penguin contribution in B -> K pi and pi pi decay modes
High Energy Physics - Phenomenology · Submitted 6 Aug 2004
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim To explain both modes at once, we may need large electroweak penguin contribution with new weak phases and some SU(3) breaking effects by new physics in both QCD and electroweak penguin type processes.
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The abstract, sentence by sentence
We discuss about a possibility of large electroweak penguin contribution in B -> K pi and pi pi from recent experimental data. The experimental data may be suggesting that there are some discrepancies between the data and theoretical estimation in the branching ratios of them. In B -> K pi decays, to explain it, a large electroweak penguin contribution and large strong phase differences seem to be needed. The contributions should appear also in B -> pi pi. We show, as an example, a solution to solve the discrepancies in both B -> K pi and B -> pi pi. However the magnitude of the parameters and the strong phase estimated from experimental data are quite large compared with the theoretical estimations. It may be suggesting some new physics effects are including in these processes. We will have to discuss about the dependence of the new physics. To explain both modes at once, we may need large electroweak penguin contribution with new weak phases and some SU(3) breaking effects by new physics in both QCD and electroweak penguin type processes.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | We discuss about a possibility of large electroweak penguin contribution in B -> K pi and pi pi from recent experimental data. | contribution 0.91 | 0.32 | 0.16 | hedged possibility 0.94 |
| s1 | The experimental data may be suggesting that there are some discrepancies between the data and theoretical estimation in the branching ratios of them. | background 0.72 | 0.07 | 0.05 | hedged possibility 1.00 |
| s2 | In B -> K pi decays, to explain it, a large electroweak penguin contribution and large strong phase differences seem to be needed. | interpretation 0.78 | 0.12 | 0.17 | hedged possibility 0.51 |
| s3 | The contributions should appear also in B -> pi pi. | interpretation 0.58 | 0.10 | 0.08 | asserted 0.84 |
| s4 | We show, as an example, a solution to solve the discrepancies in both B -> K pi and B -> pi pi. | contribution 0.87 | 0.86 | 0.15 | asserted 0.99 |
| s5 | However the magnitude of the parameters and the strong phase estimated from experimental data are quite large compared with the theoretical estimations. | result 0.79 | 0.55 | 0.14 | asserted 0.99 |
| s6 | It may be suggesting some new physics effects are including in these processes. | interpretation 1.00 | 0.17 | 0.26 | hedged possibility 1.00 |
| s7 | We will have to discuss about the dependence of the new physics. | future work 0.99 | 0.10 | 0.05 | hedged possibility 0.50 |
| s8 | To explain both modes at once, we may need large electroweak penguin contribution with new weak phases and some SU(3) breaking effects by new physics in both QCD and electroweak penguin type processes. | interpretation 0.83 | 0.25 | 0.70 | hedged possibility 0.99 |
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The paper
Original abstract
We discuss about a possibility of large electroweak penguin contribution in B -> K pi and pi pi from recent experimental data. The experimental data may be suggesting that there are some discrepancies between the data and theoretical estimation in the branching ratios of them. In B -> K pi decays, to explain it, a large electroweak penguin contribution and large strong phase differences seem to be needed. The contributions should appear also in B -> pi pi. We show, as an example, a solution to solve the discrepancies in both B -> K pi and B -> pi pi. However the magnitude of the parameters and the strong phase estimated from experimental data are quite large compared with the theoretical estimations. It may be suggesting some new physics effects are including in these processes. We will have to discuss about the dependence of the new physics. To explain both modes at once, we may need large electroweak penguin contribution with new weak phases and some SU(3) breaking effects by new physics in both QCD and electroweak penguin type processes.
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References
How the literature uses it
6 arXiv papers cite this in 11 sentences
Papers whose main result relates to this one's
States the same result 1 paper
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It may be suggesting to need the large electroweak penguin contribution with new weak phases and some SU(3) breaking effects by new physics in both QCD and electroweak penguin type processes.
Papers citing it · 6 sentences without a confident label
Uses its method or tool 1 paper
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Using the parameterisation ([ref]) and neglecting terms which are quadratic in the $r_i$ as well as the annihilation contribution $$ which has only a small real part, one has 6 different ratios which read [ref] R_c^B ≡ 2 (B^-→π^0K^- )/(B^-→π^-K̅^0) ≃ 1 + 2 (+)- 2 (+)cosγ , R_n^B ≡ 1/2 (B̅^0→π^+ K^- )/(B̅^0→π^0K̅^0) ≃ 1 + 2 (+)- 2 (+)cosγ , R_c^K ≡ 2 τ_0/τ_- (B^-→π^0 K^- )/(B̅^0→π^+ K^-) ≃ 1 + 2 ()- 2 ()cosγ , R_n^K ≡ 1/2 τ_0/τ_- (B^-→π^- K̅^0)/(B̅^0→π^0 K̅^0) ≃ 1 + 2 ()- 2 ()cosγ , R_c^π ≡ τ_0/τ_- (B^-→π^- K̅^0 )/(B̅^0→π^+ K^-) ≃ 1 + 2 ()cosγ- 2 (), R_n^π ≡ τ_0/τ_- (B^-→π^0 K^-)/(B̅^0→π^0 K̅^0) ≃ 1- 2 (+2)cosγ + 2 (2+) , where $τ_0$ and $τ_-$ are the lifetimes of the neutral and charged $B$ mesons, respectively.
B_s -> phi rho^0 and B_s -> phi pi^0 as a handle on isospin-violating New Physics · Isospin-violating observables in B to Pi,K · 0.84
Cites it as background 4 papers
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On the other hand, numerous model-independent attempts have been also made in search of NP within the quark diagram approach [ref] .
Analytic Resolution of Puzzle in $B\to K \pi$ decays · Introduction · 0.82
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Many efforts have been made to resolve the puzzle [ref] .
Generalized analysis on $B\to K^* \rho$ within and beyond the Standard Model $-$ Can it help understand the $B \to K \pi$ puzzle? · Introduction · 0.86
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In charmless final states, the most prominent ones are in the $Kπ$ channels, notably the difference $ΔA_CP$ [ref] of the direct CP asymmetries which still persists as the so-called $Kπ$ puzzle (see e.g. Refs. [ref] ), and the null-test sum rule [ref] which combines several $B →Kπ$ branching ratios and direct CP asymmetries.
QCD-factorization amplitudes from flavour symmetries: beyond the $SU(3)$ symmetric case · Introduction · 0.86
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