论文标题
$ d^+\toπ^-π^-π^+π^+$和$ D^+_ s \toπ^-π^+π^+$衰减的$π^-π^+$ $ s $ waves的现象学描述：阶段问题
Phenomenological description of the $π^-π^+$ $S$-waves in $D^+\toπ^-π^+π^+$ and $D^+_s\toπ^-π^+π^+$ decays: The problem of phases
论文作者
论文摘要
我们介绍了$π^-π^+$ $ s $ s $ s $ s $ s $ - 波振幅的LHCB数据的现象学描述，$ d^+\toπ^-π^-π^-π^+π^+$和$ d^+_ s \toπ^-π^-π^-π^+π^+π^+$衰减。我们在一个简单的模型中运行，该模型考虑了耦合通道中粒子的已知对相互作用。假定各种中间状态生产的种子复合物幅度与能量无关。它们的值是通过拟合来确定的。该模型在$ d^+\toπ^-π^-π^+π^+$和$ d^+\ to ph^+_ s \toπ^-π^-π^+π^+$中的$ d^+\ to^+_ s \ to $ d^+\ to^+_s^+π^+$在区域中损失了2m_π<m _^^^π^^^π^^^π^^^fos，对实验测量的$ s $ - $ s $ - 波振幅的能量依赖性的几乎所有特征都令人满意地描述。 GEV} $和$2M_π<m_ {π^-π^+} <1.29 \ mbox {gev} $。
We present a phenomenological description of the LHCb data for the magnitudes and phases of the $π^-π^+$ $S$-wave amplitudes in the $D^+\toπ^-π^+π^+$ and $D^+_s\toπ^-π^+π^+$ decays. We operate within a simple model that takes into account the known pair interactions of particles in coupled channels. The seed complex amplitudes for various intermediate state production are assumed to be independent of the energy. Their values are determined by fitting. This model gives the satisfactorily description of virtually all features of the energy dependence of the experimentally measured $S$-wave amplitudes in the $D^+\toπ^-π^+ π^+$ and $D^+_s\to π^-π^+π^+$ decays in the regions $2m_π<m_{π^-π^+}<1.39\mbox{ GeV}$ and $2m_π<m_{π^-π^+} <1.29\mbox{ GeV}$, respectively.
