A bstract We present an analysis of the rare exclusive B decays B → K ν ν ˉ $$ Bo Ku overline{u} $$ and B → K ? ν ν ˉ $$ Bo {K}^{st}u overline{u} $$ within the Standard Model (SM), in a model-independent manner, and in a number of new physics (NP) models. Combining new form factor determinations from lattice QCD with light-cone sum rule results and including complete two-loop electroweak corrections to the SM Wilson coefficient, we obtain the SM predictions B R B + → K + ν ν ˉ = 4.0 ± 0.5 × 1 0 ? 6 $$ mathrm{B}mathrm{R}left({B}^{+}o {K}^{+}u overline{u}ight)=left(4.0pm 0.5ight)imes 1{0}^{-6} $$ and B R B 0 → K ? 0 ν ν ˉ = 9.2 ± 1.0 × 1 0 ? 6 $$ mathrm{B}mathrm{R}left({B}^0o {K}^{st 0}u overline{u}ight)=left(9.2pm 1.0ight)imes 1{0}^{-6} $$ , more precise and more robust than previous estimates. Beyond the SM, we make use of an effective theory with dimension-six operators invariant under the SM gauge symmetries to relate NP effects in b → s ν ν ˉ $$ bo su overline{u} $$ transitions to b → s? _(+) ? _(?)transitions and use the wealth of experimental data on B → K _((?)) ? _(+) ? _(?)and related modes to constrain NP effects in B → K ? ν ν ˉ $$ Bo {K}^{left(st ight)}u overline{u} $$ . We then consider several specific NP models, including Z ′ models, the MSSM, models with partial compositeness, and leptoquark models, demonstrating that the correlations between b → s ν ν ˉ $$ bo su overline{u} $$ observables among themselves and with B ~( s )?→? μ _(+) μ _(?)and b ?→? s? _(+) ? _(?)transitions offer powerful tests of NP with new right-handed couplings and non-MFV interactions.
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机译：Bstract我们呈现了对罕见的独家B衰减B→kννν$$ b to k nu overline { nu} $$和b→k？在标准型号（SM）中，以型号独立的方式，以及许多新物理（NP）中的标准型号（SM）内ννˉ {k} nu overline { nu} $$ ） 楷模。将新的形式因子测定与光锥和规则结果的格子QCD相结合，包括完整的双环Electweak校正到SM Wilson系数，获得SM预测B R B +→K +νν= 4.0±0.5×1 0？ 6 $$ mathrm {b} mathrm {r} left（{b} ^ {+} to {k} ^ {+} nu overline { nu} rectle）= left（4.0 pm 0.5 右） times 1 {0} ^ { - 6} $$和brb 0→k？ 0ννν= 9.2±1.0×1 0？ 6 $$ mathrm {b} mathrm {r} left（{b} ^ 0 to {k} ^ { ast 0} nu overline { nu} rectle）= left（9.2 pm 1.0 右） times 1 {0} ^ { - 6} $$，比以前的估计更精确，更强大。除了SM之外，我们利用了一个有效的理论，在SM仪表对称下的尺寸-6运算符不变，以在B→Sνν$$ b to s nu overline { nu} $$转换中涉及NP效果到b→s？ _（+）？ _（？）过渡并使用B→K _（（？））的大量实验数据？ _（+）？ _（？）和相关模式来限制B→K中的NP效果？ ννν$$ b to {k} ^ { left（ ast 右）} nu overline { nu} $$。然后，我们考虑几个特定的NP模型，包括Z'模型，MSSM，具有部分合成度的模型和leptoquark模型，表明B→Sννˉˉ$$ b to s nu overline { nu}之间的相关性。 $$自己和b〜（s）之间的观察品？→？ μ_（+）μ_（？）和b？→？ s？ _（+）？ _（？）转换提供了具有新的右下耦合和非MFV交互的NP强大的测试。
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