Addressing the Multi-Channel Inverse Problem at High Energy Colliders: A Model Independent Approach to the Search for New Physics with Trileptons

Addressing the Multi-Channel Inverse Problem at High Energy Colliders: A Model Independent Approach to the Search for New Physics with Trileptons
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解决高能对撞机的多通道逆问题:一种独立于模型的三轻子新物理探索方法

DOI:
10.1088/0954-3899/39/8/085004
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发表时间:
2012
期刊:
arXiv: High Energy Physics - Phenomenology
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通讯作者:
Glatzer
Glatzer
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作者:
Glatzer

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我们描述了一种以模型独立的方式解释高能对撞机中三重子搜索的方法,并将其应用于最近在Tevatron上的搜索。关键的一步是认识到三重子特征是由四种实验上非常不同的通道组成的,这些通道由三重子状态中的τ轻子的数量定义。这些多通道对整体实验灵敏度(横截面乘以分支比)的贡献与模型无关,可以根据相关的新粒子质量进行参数化。给定特定模型的三频分支比,可以将这些实验获得的多通道灵敏度组合起来,以获得可用于与数据对抗模型的截面测量。我们的模型无关的结果比目前的Tevatron三重子的结果更广泛地适用,这些结果完全是根据超对称的mSUGRA参数来表述的。这里介绍的技术可以从三重子搜索扩展到更一般的“逆问题”,即在试图解释在多个通道中发现的新物理的竞争模型之间进行实验区分。
We describe a method for interpreting trilepton searches at high energy colliders in a model-independent fashion and apply it to the recent searches at the Tevatron. The key step is to recognize that the trilepton signature is comprised of four experimentally very different channels defined by the number of τ leptons in the trilepton state. Contributions from these multiple channels to the overall experimental sensitivity (cross-section times branching ratio) are model-independent and can be parametrized in terms of relevant new particle masses. Given the trileptonic branching ratios of a specific model, these experimentally obtained multi-channel sensitivities can be combined to obtain a cross-section measurement that can be used to confront the model with data. Our model-independent results are more widely applicable than the current Tevatron trilepton results which are stated exclusively in terms of mSUGRA parameters of supersymmetry. The technique presented here can be expanded beyond trilepton searches to the more general'inverse problem'of experimentally discriminating between competing models that seek to explain new physics discovered in multiple channels.
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