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MSSM SEARCHES AT LEP 2

机译:MSSM搜索在LEP 2

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摘要

During the LEP2 operation, the 4 LEP experiments have collected data at centre-of-mass energies up to 209 GeV. Those data have been analyzed in the search of charginos, neutralinos and sfermions in the framework of the Minimal Supersym-metric Standard Model (MSSM) with R-parity conservation and violation assuming the lightest neutralino to be the Lightest Supersymmetric Particle (SUGRA-modela) and in the context of the gauge-mediated supersymmetry breaking theory with R-parity conservation where the LSP is the gravitino (GMSB-model). No evidence for a signal was found in any of the channels. The results of each search were used to derive upper limits on production cross-sections and masses. In addition, for the neutralino LSP with R-parity conservation scenario, the combined result of all searches excludes regions in the parameter space of the constrained MSSM, leading to limits on the mass of the LSP. All limits are given at 95% confidence level, all results are preliminary.
机译:在LEP2操作期间,这4个LEP实验收集了质量中心能量高达209 GeV的数据。假设最轻的中性粒子是最轻的超对称粒子(SUGRA-modela),这些数据已在具有R奇偶性守恒且违反R的最小超对称标准模型(MSSM)的框架中搜索charginos,neutralinos和sfermion时进行了分析。并在具有R奇偶性守恒的轨距介导的超对称破坏理论的背景下,其中LSP是引力子(GMSB模型)。在任何通道中均未发现信号的证据。每次搜索的结果用于得出生产横截面和质量的上限。此外,对于具有R奇偶性保护方案的中性LSP,所有搜索的组合结果排除了约束MSSM参数空间中的区域,从而限制了LSP的质量。所有限制均以95%的置信度给出,所有结果均为初步结果。

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