Search for electroweak production of charginos in final states with two tau leptons in pp collisions at $\sqrt{s}$ = 8 TeV
Search for electroweak production of charginos in final states with two tau leptons in pp collisions at $\sqrt{s}$ = 8 TeV
复制标题
搜索在 $sqrt{s}$ = 8 TeV 处 pp 碰撞中两个 tau 轻子在最终状态下电弱产生 charginos
DOI：
10.22323/1.276.0231
复制
发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Esmaeel Eskandari
中科院分区：
文献类型：
--
作者：
Esmaeel Eskandari
研究了末态pp与两个τ轻子碰撞中超对称粒子的电弱产生。数据样本对应于18.1 fb 1和19.6 fb 1之间的积分光度，这取决于τ轻子衰变的最终状态，在τ s = 8 TeV，由CMS实验在LHC收集。在信号区观测到的事件产额与预期的标准模型背景是一致的。结果解释使用简化模型描述对生产和衰变的charginos。对于描述最轻电荷伴子对产生的模型，在以下假设下，在电荷伴子质量与中性伴子质量的平面上得到了排斥区：电荷伴子衰变为第三代轻子，这是最轻的轻子，而slepton质量位于电荷伴子和中性伴子质量的中间。电荷伴子质量低于420 GeV的被排除在95%的置信水平，在一个无质量的中性伴子的极限，和中性伴子质量高达100 GeV，电荷伴子质量高达325 GeV的被排除在95%的置信水平。
Results are presented from a search for the electroweak production of supersymmetric particles in pp collisions in final states with two tau leptons. The data sample corresponds to an integrated luminosity between 18.1 fb 1 and 19.6 fb 1 depending on the final state of tau lepton decays, at √s = 8 TeV , collected by the CMS experiment at the LHC. The observed event yields in the signal regions are consistent with the expected standard model backgrounds. The results are interpreted using simplified models describing the pair production and decays of charginos. For models describing the pair production of the lightest chargino, exclusion regions are obtained in the plane of chargino mass vs. neutralino mass under the following assumptions: the chargino decays into third-generation leptons, which are taken to be the lightest leptons, and the slepton masses lie midway between those of the chargino and the neutralino. Chargino masses below 420 GeV are excluded at a 95% confidence level in the limit of a massless neutralino, and for neutralino masses up to 100 GeV, chargino masses up to 325 GeV are excluded at 95% confidence level.