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arXiv 1507.03098hep-phhep-ex
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从迪玻色子过剩中得到的标量暗示?

A scalar hint from the diboson excess?

Giacomo Cacciapaglia, Aldo Deandrea, Michio Hashimoto

摘要:

鉴于最近ATLAS和CMS合作组报道的双玻色子共振过剩现象,我们认为一种新的弱单态赝标粒子$η_W$在LHC胶子聚变过程中可能衰变为两个弱玻色子.规范玻色子的耦合可以从Wess-Zumino-Witten异常项中产生,因此我们研究了一个有效的模型,基于异常项作为一个动机良好的唯象模型。在赝标量作为复合态出现的模型中,反常耦合的系数可以与底层动力学的费米子分量有关。我们提供了一个例子来测试的想法的可行性。

英文摘要:

In view of the recent diboson resonant excesses reported by both ATLAS and CMS Collaborations, we suggest that a new weak singlet pseudo-scalar particle, $η_W$, may decay into two weak bosons while being produced in gluon fusion at the LHC. The couplings to the gauge bosons can arise from a Wess-Zumino-Witten anomaly term and thus we study an effective model based on the anomaly term as a well motivated phenomenological model. In models where the pseudo-scalar arises as a composite state, the coefficients of the anomalous couplings can be related to the fermion components of the underlying dynamics. We provide an example to test the feasibility of the idea.

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