"Cut flow for boosted signature, T5HH model" of "Search for higgsinos decaying to two Higgs bosons and missing transverse momentum in proton-proton collisions at $\sqrt{s}$ = 13 TeV"

Results are presented from a search for physics beyond the standard model in proton-proton collisions at $\sqrt{s}=13$ TeV in channels with two Higgs bosons, each decaying via the process H$\to b\overline{b}$, and large missing transverse momentum. The search uses a data sample corresponding to an integrated luminosity of 137 fb$^{-1}$ collected by the CMS experiment at the CERN LHC. The search is motivated by models of supersymmetry that predict the production of neutralinos, the neutral partners of the electroweak gauge and Higgs bosons. The observed event yields in the signal regions are found to be consistent with the standard model background expectations. The results are interpreted using simplified models of supersymmetry. For the electroweak production of nearly degenerate higgsinos, each of whose decay chains yields a neutralino ($\widetilde{\chi}^0_1$) that in turn decays to a massless goldstino and a Higgs boson, $\widetilde{\chi}^0_1$ masses in the range 175 to 1025 GeV are excluded at 95\% confidence level. For the strong production of gluino pairs decaying via a slightly lighter $\widetilde{\chi}^0_2$ to H and a light $\widetilde{\chi}^0_1$, gluino masses below 2330 GeV are excluded.本研究报道了在欧洲核子研究中心大型强子对撞机（Large Hadron Collider, LHC）的紧凑型μ子线圈（CMS, Compact Muon Solenoid）实验采集的积分亮度为137 fb⁻¹的数据样本中，针对质心系能量$sqrt{s}=13$ TeV的质子-质子对撞（proton-proton collisions）末态开展的超出标准模型（Standard Model）物理的搜寻结果：该末态包含一对希格斯玻色子（Higgs bosons），每个希格斯玻色子均通过衰变道H→b$overline{b}$衰变，且伴随大横向缺失动量。本次搜寻的理论动机源自超对称（supersymmetry）模型，这类模型预言了中性微子（neutralinos，即电弱规范玻色子与希格斯玻色子的中性伴随粒子）的产生。信号区域内观测到的事件产额与标准模型本底预期相符。本研究采用超对称简化模型（simplified models of supersymmetry）对结果进行诠释：对于衰变链均产生中性微子$widetilde{chi}^0_1$，且该中性微子进一步衰变为无质量黄金微子（goldstino）与希格斯玻色子的近简并希格斯微子（nearly degenerate higgsinos）电弱产生过程，175 GeV至1025 GeV范围内的$widetilde{chi}^0_1$质量在95%置信水平（confidence level）下被排除；对于通过质量略轻的$widetilde{chi}^0_2$衰变至希格斯玻色子与轻中性微子$widetilde{chi}^0_1$的胶微子（gluino）对强产生（strong production）过程，质量低于2330 GeV的胶微子被排除。