论文标题
调查$ b_s $三体衰减到扰动QCD方法的标量介子
Investigating $B_s$ three-body decays to scalar mesons in perturbative QCD approach
论文作者
论文摘要
在这项工作中，我们研究B^{0} _ {s} \ rightArrow a_ {0}（980）[\ rightArrow k \ overline {k}的分支率π^{+}π^{ - }，k^{+} k^{ - }] f_ {0}（980）和b^{0} _ {s} \ rightarrow f_ {0}（500）方法，其中标量介子a_ {0}（980），f_ {0}（980）和f_ {0}（500）被视为最低的lliesing q \ ediming {q}状态。在su（3）nonet中，存在标量f_ {0}（980）和f_ {0}（500）之间的混合，因此我们考虑了计算中的混合效应以获得更可靠的数据，以及在[15^{\ circs}，82^{\ cipp}，\ cource} {\ cimp}和[\ cipp}和[105]和[105^]，[15^{\ circt}，[15^{\ circt]，[105^]，[105^}，[105^}，[105^] 171^{\ circ}]。基于Isospin对称性，我们还估计了B^{0} _ {s} \ rightarrow f_ {0}（980）[\rightArrowπ^π^{0}π^{0}] f_ {0}] f_ {0}（500）[\rightarrowπ^{0}π^{0}] f_ {0}（500）衰减。 b^{0} _ {s} \ rightArrow a_ {0}（980）[\ rightArow k \ overline {k}，πη] a_ {0}（980）衰减的分支比\rightArrowππ，k \ overline {k}] f_ {0}（980）和b^{0} _ {s} \ rightArrow f_ {0}（500）[\rightArrowπππ] f_ {0}（500）腐烂的顺序均可达到10^}}^ - 6}}^ - 6}}^ - 6}} LHCB和Belle II实验希望。
In this work, we study the branching ratios of B^{0}_{s}\rightarrow a_{0}(980)[ \rightarrow K\overline{K}, πη]a_{0}(980), B^{0}_{s} \rightarrow f_{0}(980)[ \rightarrow π^{+}π^{-}, K^{+}K^{-}]f_{0}(980) and B^{0}_{s} \rightarrow f_{0}(500)[ \rightarrow π^{+}π^{-}]f_{0}(500) decays in the pQCD approach, in which the scalar mesons a_{0}(980), f_{0}(980) and f_{0}(500) are regarded as the lowest-lying q\overline{q} state. In the SU(3) nonet, there exists a mixing between the scalars f_{0}(980) and f_{0}(500), so we have considered the mixing effect in our calculations to obtain more reliable data, and the mixing angle θis set at [15^{\circ}, 82^{\circ}] and [105^{\circ}, 171^{\circ}]. Based on the isospin symmetry, we also estimate the branching ratios of the B^{0}_{s} \rightarrow f_{0}(980)[ \rightarrow π^{0}π^{0}]f_{0}(980) and B^{0}_{s} \rightarrow f_{0}(500)[ \rightarrow π^{0}π^{0}]f_{0}(500) decays. The branching ratios of the B^{0}_{s}\rightarrow a_{0}(980)[ \rightarrow K\overline{K}, πη]a_{0}(980) decays are much small, while the results of the B^{0}_{s} \rightarrow f_{0}(980)[ \rightarrow ππ, K\overline{K}]f_{0}(980) and B^{0}_{s} \rightarrow f_{0}(500)[ \rightarrow ππ]f_{0}(500) decays are at the order of 10^{-6}\sim10^{-5}, which can be tested in the LHCb and Belle II experiments, hopefully.
