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arXiv 2201.06565hep-phhep-ex
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恢复$H^-$解释$R_{D^{(*)}}$异常并关闭低质量窗

Revival of $H^-$ interpretation of $R_{D^{(*)}}$ anomaly and closing low mass window

Syuhei Iguro

摘要:

由于最近对$B_c$介子寿命的理论预测进行了仔细的重新审视,由于粲夸克质量的不确定性较大,发现$B_c$介子模分支比的保守上限为$\simeq 63\%$.虽然众所周知,$H^-$(带电希格斯)解释的$R_{D^{(*)}}$异常被排除在以前提出的边界,BR $(B_c\toτν)\le 30\%$和$\le10\%$,$H^-$仍然可以解释$1σ$内的异常,如果我们采用63 $\%$之一。标量的贡献也有利于极化数据$F_L^{D^*}$在百丽测量。由于隐含的NP尺度在大型强子对撞机(LHC)的范围内,对撞机搜索是测试该方案的有力工具。例如,$τν$共振搜索已经为$m_{H^-}\ge 400\,$ GeV设定了更严格的界限。在这项工作中,我们重新审视更轻的质量范围,$180\,$ GeV $\le m_{H^-}\le 400\,$ GeV尚未被覆盖。我们将看到,传统的stau搜索和低质量风味包容性和底部风味di-jet共振搜索的组合可以对解释施加新的限制。本文总结了低质量区的研究现状,并在现有对撞机条件下讨论了高亮度(HL)-LHC的未来灵敏度。

英文摘要:

Thanks to the recent careful revisit of the theoretical prediction of the $B_c$ meson lifetime, the conservative upper bound on the branching ratio (BR) of $τν$ mode is found to be $\simeq 63\%$ due to the large charm quark mass uncertainty. Although it is well known that a charged Higgs ($H^-$) interpretation of the $R_{D^{(*)}}$ anomaly is excluded by the previously proposed bounds, BR$(B_c\toτν)\le 30\%$ and $\le10\%$, $H^-$ can still explain the anomaly within $1σ$ if we adopt the 63$\%$ one. The scalar contribution is also favored by the polarization data $F_L^{D^*}$ measured at the Belle. Since the implied NP scale is within the reach of the Large Hadron Collider (LHC), collider searches are powerful tools to test the scenario. For instance, the $τν$ resonance search has already put the more stringent bound for $m_{H^-}\ge 400\,$GeV. In this work we revisit the further lighter mass range, $180\,$GeV$\le m_{H^-}\le 400\,$GeV which has not been covered yet. We will see that a combination of the conventional stau search and low mass flavor inclusive and bottom flavored di-jet resonance searches can place a new limit on the interpretation. We summarize the current status of the low mass region and discuss the future sensitivity in the high luminosity (HL)-LHC based on the existent collider constraints.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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