Constraining electroweak penguin graph contributions in measurements of the CKM phase alpha using B→ππ and B→ρρ decays

Abinash Kumar Nayak; Rahul Sinha; Anirban Karan; Benjamin Grinstein

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Constraining electroweak penguin graph contributions in measurements of the CKM phase alpha using B→ππ and B→ρρ decays

机译：使用B→ΠΠ和B→ρρ衰减的CKM相α的测量中的Electweak企鹅图贡献

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The unitarity of the Cabibbo-Kobayashi-Maskawa (CKM) matrix has been well established by both direct and indirect measurements without any evidence of discrepancy. The CKM weak phase α is directly measured using an isospin analysis in B → π π and B → ρ ρ assuming that electroweak penguin contributions are ignorable. However, electroweak penguins are sensitive to NP, hence, it is important to experimentally estimate their effects. We determine the size of both electroweak penguin and isospin amplitudes, directly from B → π π and B → ρ ρ experimental data, using in addition the indirectly measured value of α . We find that electroweak penguin contribution are indeed small and agree with SM expectations within 1 σ . We also find that there is a mild enhancement of the Δ I = 1 2 transition amplitude.

机译：Cabibbo-Kobayashi-maskawa（CKM）矩阵的统一是通过直接和间接测量的，而无需任何差异的证据即可得到很好的。假设Electweak Penguin贡献是无知的，使用B→ππ和B→ρρ直接测量CKM弱相α。然而，ElectWeak企鹅对NP敏感，因此，实验估计其效果非常重要。我们通过另外的间接测量值，直接从B→ππ和B→ρρ→ρρρρ→ρρ→ρρρ→ρρρ→ρρρρ→ρρρρ→ρρ→ρρ→ρρρρ·ρρ→ρρ·ρ的尺寸。我们发现Electweak Penguin贡献确实很小，并在1σ内同意SM期望。我们还发现ΔI= 1 2转变幅度的温和增强。

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《Physical review, D》 |2020年第7期|共6页
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Abinash Kumar Nayak; Rahul Sinha; Anirban Karan; Benjamin Grinstein;
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1. Rescattering and electroweak penguin effects in strategies to constrain and determine the CKM angle #gamma# from B->#pi#K decays [J] . Robert Fleischer The European physical journal, C. Particles and fields . 1999,第3期

机译：从B->＃pi＃K衰变来约束和确定CKM角＃gamma＃的策略中的散射和弱电企鹅效应
2. Improving the measurement of the CKM phase phi(2) = alpha in B -> pi pi and B -> rho rho decays [J] . Gronau Michael, Rosner Jonathan L. Physics Letters, B. Nuclear Physics and High Energy Physics . 2016,第Null期

机译：改善B - > Pi Pi和B中的CKM相Phi（2）=α的测量 - > Rho Rho衰减
3. Improving the measurement of the CKM phase phi(2) = alpha in B - pi pi and B - rho rho decays [J] . Gronau Michael, Rosner Jonathan L. Physics Letters, B. Nuclear Physics and High Energy Physics . 2016,第Null期

机译：改善B-> pi pi和B-> rho rho衰减中CKM相phi（2）= alpha的测量
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机译：双重性违规和K→πIEltoweak企鹅算子矩阵元素来自Hadronicτ衰减
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机译：在BABAR探测器上使用B介子衰变到rho最终状态测量CKM角α。
6. Chromatin measurements reveal contributions of synthesis and decay to steady-state mRNA levels [O] . Sylvia C Tippmann, Robert Ivanek, Dimos Gaidatzis, 2012

机译：染色质测量揭示了合成和衰变对稳态mRNA水平的贡献
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机译：改善$ B \的CKm阶段$ \ phi_2 = \ alpha $的测量值 \ pi \ pi $和$ B \ to \ rho \ rho $衰变

Constraining electroweak penguin graph contributions in measurements of the CKM phase alpha using B→ππ and B→ρρ decays

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