剖析Wjj异常：一个嗜轻Z'的诊断测试
Dissecting the Wjj Anomaly: Diagnostic Tests of a Leptophobic Z'
摘要：
我们研究的情况下，一个疏轻子Z'玻色子占过剩的事件中观察到的CDF的Wjj通道。我们假设Z'的耦合与世代无关，并使用CDF引用的截面范围以及UA 2的dijet产生的约束条件获得四个强子耦合的允许区域。这些耦合区域转化为Tevatron和LHC的Z/γ+Z'以及LHC的W+Z'的相关产生的确定速率，其与Tevatron观察到的Wj j速率直接相关。LHC的Wjj速率很大，一旦SM背景得到控制，应该很快就能观察到这个通道。Z/γ+Z'相关产生的速率较小，考虑到预期的SM背景，这些过程应该还没有在Tevatron上观察到。此外，我们还表明，有价值的耦合信息是从其他运动变量的分布，例如，M_{WZ'}、p_T^W和\cos θ_W^*。一旦发现，这些相关的生产过程和相应的运动学分布检查这里将提供进一步的Z'玻色子耦合的有价值的信息。
英文摘要：
We examine the scenario where a leptophobic Z' boson accounts for the excess of events in the Wjj channel as observed by CDF. We assume generation independent couplings for the Z' and obtain allowed regions for the four hadronic couplings using the cross section range quoted by CDF as well as constraints from dijet production at UA2. These coupling regions translate into well-determined rates for the associated production of Z/γ+Z' at the Tevatron and LHC, as well as W+Z' at the LHC,that are directly correlated with the Wjj rate observed at the Tevatron. The Wjj rate at the LHC is large and this channel should be observed soon once the SM backgrounds are under control. The rates for Z/γ+Z' associated production are smaller, and these processes should not yet have been observed at the Tevatron given the expected SM backgrounds. In addition, we also show that valuable coupling information is obtainable from the distributions of other kinematic variables, e.g., M_{WZ'}, p_T^W, and \cos θ_W^*. Once detected, these associated production processes and the corresponding kinematic distributions examined here will provide further valuable information on the Z' boson couplings.
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