论文标题
$ b $ - 物理实验的异常$ WTB $耦合的约束
Constraints on the anomalous $Wtb$ couplings from $B$-physics experiments
论文作者
论文摘要
我们分析了$ b $ - 物理实验的异常$ WTB $耦合的约束，执行相关分析，并允许所有异常耦合与其标准模型（SM）值同时差异。 $ b $ - 物理可观察的物体允许一个人在四个异常耦合中探测三个线性组合，这在$ wtb $顶点的参数化下，假设SM对称性仍然是有效理论的对称性。这项工作中的约束是通过考虑以下$ b $ - 物理学可观察物的：$ \ bar b^0-b^0 $振荡，leptonic $ b \toμ^+μ^ - $衰减 - 包含辐射的$ b \ tox_sγ$ dectox_sγ$ n semial in n semial conmiatial commial conmial in Commial in Commiate comprive+b b b b b b b b b b b b b b b b b b b b b b b b a μ^ - $和独家$ b \ to（k，k^*）μ^+μ^ - $ $ $ n-$ q^2 $，$ q $，$μ^+μ^ - $ pair的动量。我们发现，异常耦合的SM值属于95 \％Cl允许的区域，但属于68 \％允许的区域。我们还报告说，在我们方案中获得的异常耦合的分布与1D方案的结果不同，而仅允许其中一个耦合偏离其SM值。
We analyze constraints on the anomalous $Wtb$ couplings from $B$-physics experiments, performing a correlated analysis and allowing all anomalous couplings to differ simultaneously from their Standard-Model (SM) values. The $B$-physics observables allow one to probe three linear combinations out of the four anomalous couplings, which parameterize the $Wtb$ vertex under the assumption that the SM symmetries remain the symmetries of the effective theory. The constraints in this work are obtained by taking into account the following $B$-physics observables: the $\bar B^0-B^0$ oscillations, the leptonic $B\to μ^+μ^-$ decays, the inclusive radiative $B\to X_sγ$ decays, and the differential branching fractions in the semileptonic inclusive $B\to X_s μ^+ μ^-$ and exclusive $B\to (K,K^*)μ^+μ^-$ decays at small $q^2$, $q$ the momentum of the $μ^+μ^-$ pair. We find that the SM values of the anomalous couplings belong to the 95\% CL allowed region obtained this way but lie beyond the 68\% allowed region. We also report that the distributions of the anomalous couplings obtained within our scenario differ from the results of the 1D scenario, when only one of the couplings is allowed to deviate from its SM value.
