Dark matter, Z′, and vector-like quark at the LHC and b → sμμ anomaly Supported by the National Natural Science Foundation of China (11975013, 11775025), the Natural Science Foundation of Shandong province (ZR2017JL002, ZR2017MA004) and the Project of Shandong Province Higher Educational Science and Technology Program (2019KJJ007),Chinese Physics C

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Dark matter, Z′, and vector-like quark at the LHC and b → sμμ anomaly Supported by the National Natural Science Foundation of China (11975013, 11775025), the Natural Science Foundation of Shandong province (ZR2017JL002, ZR2017MA004) and the Project of Shandong Province Higher Educational Science and Technology Program (2019KJJ007)
Chinese Physics C ( IF 3.6 ) Pub Date : 2021-07-27 , DOI: 10.1088/1674-1137/ac06ba
Wei Chao ₁ , Hong-Xin Wang ₂ , Lei Wang ₂ , Yang Zhang ₃

Affiliation

Combining the $b\to s\mu^+\mu^-$ anomaly and dark matter observables, we study the capability of the LHC to test dark matter, $Z^{\prime}$ , and a vector-like quark. We focus on a local $U(1)_{L_\mu-L_\tau}$ model with a vector-like $ SU(2)_L $ doublet quark Q and a complex singlet scalar whose lightest component $ X_I $ is a candidate of dark matter. After imposing relevant constraints, we find that the $b\to s\mu^+\mu^-$ anomaly and the relic abundance of dark matter favor $m_{X_I} \lt 350$ GeV and $m_{Z^{\prime}} \lt 450$ GeV for $m_Q \lt$ 2 TeV and $m_{X_R} \lt$ 2 TeV (the heavy partner of $m_{X_I}$ ). Current searches for jets and missing transverse momentum at the LHC sizably reduce the mass ranges of the vector-like quark, and $ m_Q $ is required to be larger than 1.7 TeV. Finally, we discuss the possibility of probing these new particles at the high luminosity LHC via the QCD process $pp \to D\bar{D}$ followed by $D\to s (b) X_I$ , $D\to s (b) Z'X_I$ , and then $Z'\to$ $\mu^+\mu^-$ . Taking a benchmark point of $ m_Q $ = 1.93 TeV, $m_{Z^\prime} = 170$ GeV, and $m_{X_I} =$ 145 GeV, we perform a detailed Monte Carlo simulation and find that this benchmark point can be accessed at the 14 TeV LHC with an integrated luminosity of 3000 fb $^{-1}$ .

中文翻译：

LHC暗物质、Z′、类向量夸克和b→sμμ异常国家自然科学基金（11975013、11775025）、山东省自然科学基金（ZR2017JL002、ZR2017MA004）和山东省高等教育科技计划（2019KJJ007）

结合 $b\to s\mu^+\mu^-$ 异常和暗物质的可观测性，我们研究了大型强子对撞机测试暗物质 $Z^{\prime}$ 和类矢量夸克的能力。我们专注于 $U(1)_{L_\mu-L_\tau}$ 具有类似矢量的 $ SU(2)_L $ 双重夸克Q和复杂单重标量的局部模型，其最轻的成分 $ X_I $ 是暗物质的候选者。在施加相关约束后，我们发现 $b\to s\mu^+\mu^-$ 暗物质的异常和遗迹丰度有利于 $m_{X_I} \lt 350$ GeV 和 $m_{Z^{\prime}} \lt 450$ GeV 为 $m_Q \lt$ 2 TeV 和 $m_{X_R} \lt$ 2 TeV（的重伙伴 $m_{X_I}$ ）。目前在 LHC 上对喷流的搜索和缺少横向动量大大减少了类矢量夸克的质量范围，并且 $ m_Q $ 要求大于 1.7 TeV。最后，我们讨论了通过 QCD 过程在高亮度 LHC 上探测这些新粒子的可能性， $pp \to D\bar{D}$ 然后是 $D\to s (b) X_I$ 、 $D\to s (b) Z'X_I$ 、 $Z'\到$ $\mu^+\mu^-$ 。取基准点 $ m_Q $ = 1.93 TeV、 $m_{Z^\prime} = 170$ GeV 和 $m_{X_I} =$ 145 GeV，我们进行了详细的蒙特卡罗模拟，发现该基准点可以在 14 TeV LHC 上访问，集成光度为 3000 fb $^{-1}$ 。

更新日期：2021-07-27

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