arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1504.00574hep-phhep-ex
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$\bar{B}^{0}\to \bar{K}^{*0}μ^+μ^-$衰变的$q^2$依赖性衰变幅度的未分组测量方法

Method for an unbinned measurement of the $q^2$ dependent decay amplitudes of $\bar{B}^{0}\to \bar{K}^{*0}μ^+μ^-$ decays

Ulrik Egede, Mitesh Patel, Konstantinos A. Petridis

摘要:

提出了一种通过对数据的极大似然拟合来确定$\bar{B}^{0}\to \bar{K}^{*0}μ^+μ^-$衰变的$q^2$依赖的$\bar{K}^{*0}$自旋振幅的方法。虽然目前的实验技术提取一组有限的观测值在箱的$q^2$,我们的方法允许所有可观测量的连续分布在$q^2$的确定。通过这样做,该方法消除了需要校正这些观测值的理论预测的$q^2$平均效应,从而增加了灵敏度的物理效应超出了标准模型。考虑到角分布的对称性,并利用振幅的$q^2$依赖性的三参数模型,利用模拟事件估计了角观测量的精度和对新物理的敏感性。这些研究基于运行I期间LHCb实验收集的样本量和运行II的预期样本量。

英文摘要:

A method for determining the $q^2$ dependent $\bar{K}^{*0}$ spin amplitudes of $\bar{B}^{0}\to \bar{K}^{*0}μ^+μ^-$ decays through a maximum likelihood fit to data is presented. While current experimental techniques extract a limited set of observables in bins of $q^2$, our approach allows for the determination of all observable quantities as continuous distributions in $q^2$. By doing this, the method eliminates the need to correct theory predictions of these observables for $q^2$ averaging effects, thus increasing the sensitivity to the effects of physics beyond the Standard Model. Accounting for the symmetries of the angular distribution and using a three parameter ansatz for the $q^2$ dependence of the amplitudes, the precision of the angular observables and the sensitivity to new physics is estimated using simulated events. These studies are based on the sample sizes collected by the LHCb experiment during Run-I and expected for Run-II.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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