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arXiv 2001.04395hep-phhep-ex
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在$b\rightarrow sμ^+μ^-$异常中新物理方案之间的独特区分

A unique discrimination between new physics scenarios in $b\rightarrow sμ^+μ^-$ anomalies

Ashutosh Kumar Alok, Suman Kumbhakar, S. Uma Sankar

摘要:

许多与$b \to s \ell^+ \ell^-$跃迁相关的观测值显示出与标准模型预测的偏差。对当前$b\rightarrow s\ell^+\ell^-$数据的全局拟合提出了几个新的物理解决方案。考虑到一次只有一个操作员和新的物理只在μ介子部门,它已被证明,新的物理方案(I)$C_9^{\rm NP}<0$,(II)$C_{9}^{\rm NP} = -C_{10}^{\rm NP}$,(III)$C_9^{\rm NP} = -C_9^{\prime \rm NP}$可以解释所有的数据。在这项工作中,我们开发了一个程序来唯一地识别正确的新的物理解决方案。情景II预测的$\mathcal{B}(B_s\to μ^+μ^-)$值明显较低,如果实验不确定性下降三倍,则可与其他两种情景区分开来。另一方面,在$B\to K^*μ^+μ^-$衰变的高$q^2$仓中精确测量CP平均角可观测量$S_9$可以唯一地区分其他两种情况。我们提出了新的方法,在方位角不对称性,测量$S_9$与必要的精度。

英文摘要:

A number of observables related to the $b \to s \ell^+ \ell^-$ transition show deviations from their standard model predictions. A global fit to the current $b\rightarrow s\ell^+\ell^-$ data suggests several new physics solutions. Considering only one operator at a time and new physics only in the muon sector, it has been shown that the new physics scenarios (I) $C_9^{\rm NP}<0$, (II) $C_{9}^{\rm NP} = -C_{10}^{\rm NP}$, (III) $C_9^{\rm NP} = -C_9^{\prime \rm NP}$ can account for all data. In this work, we develop a procedure to uniquely identify the correct new physics solution. The scenario II predicts a significantly lower value of $\mathcal{B}(B_s\to μ^+μ^-)$ and can be distinguished from the other two scenarios if the experimental uncertainty comes down by a factor of three. On the other hand, a precise measurement of the CP averaged angular observables $S_9$ in high $q^2$ bin of $B\to K^*μ^+μ^-$ decay can uniquely discriminate between the other two scenarios. We propose new methods, in terms of azimuthal angle asymmetries, to measure $S_9$ with the necessary precision.

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