论文标题
为$ b^+ \狩猎至k^+τ^+τ^ - $ b^+ \ to k^+μ^+μ^ - $ dimuon频谱
Hunting for $B^+\to K^+ τ^+τ^-$ imprints on the $B^+ \to K^+ μ^+μ^-$ dimuon spectrum
论文作者
论文摘要
我们研究了将$ b^{+} \间接约束至k^{+}τ^+τ^ - $ decay速率使用$ b^{+} \ to k^{+}μ^+μ^ - $ dimuon Spectrum上的精确数据的可能性。为此，我们估计由$ b^{+} \ to k^{+}τ^+τ^ - \ to k^{+}μ^+μ^ - $重新散发过程的频谱的失真，并提出一种同时约束此（非标准）贡献的方法，以效应效率和相关性。后者使用振幅的分析特性与数据和扰动计算相结合来限制。最后，我们估计了在LHCB实验中与当前和将来数据集的敏感性。我们发现，可以使用当前数据集实现$ O（10^{ - 3}）$的分支分数的约束，而LHCB升级-II升级性可以获得$ O（10^{ - 4}）$的限制。
We investigate the possibility of indirectly constraining the $B^{+}\to K^{+}τ^+τ^-$ decay rate using precise data on the $B^{+}\to K^{+}μ^+μ^-$ dimuon spectrum. To this end, we estimate the distortion of the spectrum induced by the $B^{+}\to K^{+}τ^+τ^-\to K^{+} μ^+μ^-$ re-scattering process, and propose a method to simultaneously constrain this (non-standard) contribution and the long-distance effects associated to hadronic intermediate states. The latter are constrained using the analytic properties of the amplitude combined with data and perturbative calculations. Finally, we estimate the sensitivity expected at the LHCb experiment with present and future datasets. We find that constraints on the branching fraction of $O(10^{-3})$, competitive with current direct bounds, can be achieved with the current dataset, while bounds of $O(10^{-4})$ could be obtained with the LHCb upgrade-II luminosity.
