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arXiv 0802.4085hep-ph
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LHC上的Sparticles

Sparticles at the LHC

Daniel Feldman, Zuowei Liu, Pran Nath

摘要:

超粒子质量等级将在大型强子对撞机上可见的签名类型中发挥重要作用。我们分析这些层次结构的四个最轻的sparticles的一般类的超引力统一模型,包括非普适性的软断裂部门。结果表明,几乎$10^4$的可能性sparticle质量等级,只有少数幸存的辐射电弱对称性破缺,遗迹密度和其他实验约束的严格约束。利用一组包括多重轻子态、强子衰变$τ$、标记$b$喷流和其它强子喷流的末态,研究了大型强子对撞机上这些质量模式的特征空间.总之,我们分析了40多个这样的轻子加喷流和失踪的能量签名以及几个运动学签名,如失踪的横向动量,有效质量,和不变的质量分布的最终状态观测。结果表明,复合分析可以产生显着的歧视sparticle质量模式之间允许一个可能的识别源的软断裂。虽然给出的分析是针对超重力模型的,但基于质量模式分析的技术适用于包括弦和膜模型在内的广泛的一类模型。

英文摘要:

Sparticle mass hierarchies will play an important role in the type of signatures that will be visible at the Large Hadron Collider. We analyze these hierarchies for the four lightest sparticles for a general class of supergravity unified models including nonuniversalities in the soft breaking sector. It is shown that out of nearly $10^4$ possibilities of sparticle mass hierarchies, only a small number survives the rigorous constraints of radiative electroweak symmetry breaking, relic density and other experimental constraints. The signature space of these mass patterns at the Large Hadron Collider is investigated using a large set of final states including multi-leptonic states, hadronically decaying $τ$s, tagged $b$ jets and other hadronic jets. In all, we analyze more than 40 such lepton plus jet and missing energy signatures along with several kinematical signatures such as missing transverse momentum, effective mass, and invariant mass distributions of final state observables. It is shown that a composite analysis can produce significant discrimination among sparticle mass patterns allowing for a possible identification of the source of soft breaking. While the analysis given is for supergravity models, the techniques based on mass pattern analysis are applicable to wide class of models including string and brane models.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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