"Table 51" of "Search for the direct production of charginos, neutralinos and staus in final states with at least two hadronically decaying taus and missing transverse momentum in $pp$ collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector"

CERN-LHC. Results of a search for the electroweak associated production of charginos and next-to-lightest neutralinos, pairs of charginos or pairs of tau sleptons are presented. These processes are characterised by final states with at least two hadronically decaying tau leptons, missing transverse momentum and low jet activity. The analysis is based on an integrated luminosity of 20.3 fb-1 of proton-proton collisions at sqrt(s) = 8 TeV recorded with the ATLAS experiment at the Large Hadron Collider. No significant excess is observed with respect to the predictions from Standard Model processes. Limits are set at 95% confidence level on the masses of the lighter chargino and next-to-lightest neutralino for various hypotheses for the lightest neutralino mass in simplified models. In the scenario of direct production of chargino pairs, with each chargino decaying into the lightest neutralino via an intermediate tau slepton, chargino masses up to 345 GeV are excluded for a massless lightest neutralino. For associated production of mass-degenerate charginos and next-to-lightest neutralinos, both decaying into the lightest neutralino via an intermediate tau slepton, masses up to 410 GeV are excluded for a massless lightest neutralino.

欧洲核子研究中心大型强子对撞机（CERN-LHC）数据集说明：本研究呈现了超对称粒子电弱协同产生过程的搜寻结果，涵盖chargino（chargino）与次轻中性ino（next-to-lightest neutralino）的协同产生、chargino成对产生以及τ轻子超伴子（tau slepton）成对产生三类过程。此类过程的末态特征为至少包含两个强衰变τ轻子、横向缺失动量以及低喷注活动性。本分析基于大型强子对撞机（Large Hadron Collider, LHC）上ATLAS实验（ATLAS）采集的、质心系能量√s=8 TeV的质子-质子碰撞数据，积分亮度为20.3 fb⁻¹。相较于标准模型（Standard Model）过程的理论预言，未观测到显著的信号超出。在简化模型框架下，针对最轻中性ino（lightest neutralino）质量的多种假设，我们在95%置信水平上对较轻chargino与次轻中性ino的质量设置了排除限。在chargino对直接产生的情景中，若每个chargino通过中间τ轻子超伴子衰变至最轻中性ino，当最轻中性ino质量为零时，质量不超过345 GeV的chargino均被排除。对于质量简并的chargino与次轻中性ino的协同产生过程，若二者均通过中间τ轻子超伴子衰变至最轻中性ino，当最轻中性ino质量为零时，质量不超过410 GeV的粒子均被排除。