论文标题
$ d^{*0} \ toμ^+μ^ - $和$ b _ {（s）}^{*0} \toμ^+μ^ - $ depays的研究前景
Prospects for studies of $D^{*0} \to μ^+μ^-$ and $B_{(s)}^{*0} \to μ^+μ^-$ decays
论文作者
论文摘要
向量$ d^{*0} $和$ b _ {（s）}^{*0} $介子到$ \ mumu $最终状态为测试粒子物理学标准模型提供了新的潜力。这样的过程具有极小的分支分数，因为矢量介子能够通过电磁衰减，并且（对于$ d^{*0} $梅森）强相互作用。尽管如此，在LHC碰撞中生产大量这些颗粒，以及利用可以抑制背景为低水平的实验技术的能力，为达到有趣的灵敏度提供了良好的潜力。由于流离失所的顶点的清洁实验签名，将这些过程重建为$ b^ - $或$ b_c^+$梅森的衰减链的一部分似乎特别有吸引力。实际上，已发布有关$ \ bm \ to \ pim \ mumu $衰减的LHCB数据已经意味着$ d^{*0} \ toμ^+μ^ - $的分支分数的严格限制。对$ d^{*0} \至μ^+μ^ - $和$ b _ {（s）}^{*0} \toμ^+μ^ - $ $^$损失的估计值是对$ d^{*0} \ $ d^{*0} \ $^+μ^ - $和$ b _ $^ - $^ - $^$^$^$的估计。
Weak decays of the vector $D^{*0}$ and $B_{(s)}^{*0}$ mesons to the $\mumu$ final state provide novel potential to test the Standard Model of particle physics. Such processes have extremely small branching fractions as the vector mesons are able to decay through electromagnetic and (for the $D^{*0}$ meson) strong interactions. Nonetheless, the production of copious quantities of these particles in LHC collisions, and the ability to exploit experimental techniques that can suppress background to low levels, provides good potential to reach interesting sensitivity. The possibility to reconstruct these processes as part of the decay chain of $B^-$ or $B_c^+$ mesons appears particularly attractive due to the clean experimental signature of the displaced vertex. Indeed, published LHCb data on $\Bm \to \pim\mumu$ decays already implies a stringent limit on the branching fraction of $D^{*0} \to μ^+μ^-$. Estimates are made on the achievable sensitivity to $D^{*0} \to μ^+μ^-$ and $B_{(s)}^{*0} \to μ^+μ^-$ decays with the LHCb experiment.
