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arXiv 1009.0980hep-ph
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HQET中半轻子$B_{s1}$、$B^{*}_{s2}$、$B^{*}_{s0}$和$B'_{s1}$衰变的QCD求和规则分析

QCD Sum Rule Analysis of Semileptonic $B_{s1}$, $B^{*}_{s2}$, $B^{*}_{s0}$, and $B'_{s1}$ Decays in HQET

Long-Fei Gan, Ming-Qiu Huang

摘要:

在重夸克有效理论的框架下,分析了轨道波激发的$B_{s}$介子态$B^{**}_{s}$,包括新发现的窄态$B_{s1}(5830)$和$B^{*}_{s2}(5840)$,到低能级$D_{s}$介子($D_{s}(1968)$,$D^{*}_{s}(2112)$,$D_{sJ}(2317)$,$D_{sJ}(2460)$)的半轻子衰变.在重夸克展开的首阶,利用QCD求和规则估计了相应的普适形状因子。预测了衰变宽度,并估计了分支比。

英文摘要:

We present an analysis of semileptonic decays of orbitally, $P$-wave excited $B_{s}$ meson states $B^{**}_{s}$, including the newly found narrow $B_{s1}(5830)$ and $B^{*}_{s2}(5840)$ states, into low lying $D_{s}$ mesons ($D_{s}(1968)$, $D^{*}_{s}(2112)$, $D_{sJ}(2317)$, $D_{sJ}(2460)$) within the framework of heavy quark effective theory. The relevant universal form factors are estimated using QCD sum rules at the leading-order of the heavy quark expansion. The decay widths are predicted and the branching ratios are estimated.

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