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arXiv 1303.0935hep-ph
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更新了最小微粒子模型的结果

Updated results for minimal dilaton model

Tomohiro Abe, Ryuichiro Kitano, Yasufumi Konishi, Kin-ya Oda, Joe Sato, Shohei Sugiyama

摘要:

在大型强子对撞机上进行的ATLAS和CMS实验都报道了在125 GeV附近观测到质量与标准模型(SM)希格斯玻色子一致的粒子,但是在每个实验的双光子衰变通道中都有超出SM预期的事件。我们仍然有可能在逻辑上认为我们看到的不是SM希格斯粒子,而是其他东西。在这里,我们介绍了最小的强子模型,其中LHC信号被解释为一个额外的单重标量的质量约为125 GeV,轻微混合的SM希格斯重于600 GeV。当这个标量的真空期望值远远超过电弱标度时,它可以被识别为线性实现的玻色子场。虽然目前希格斯粒子搜索的实验限制不利于这样的区域,但单重标量模型本身仍然提供了一个可行的替代SM希格斯粒子的搜索结果。

英文摘要:

Both the ATLAS and CMS experiments at the LHC have reported the observation of the particle of mass around 125GeV which is consistent to the Standard Model (SM) Higgs boson, but with an excess of events beyond the SM expectation in the diphoton decay channel at each of them. There still remains room for a logical possibility that we are not seeing the SM Higgs but something else. Here we introduce the minimal dilaton model in which the LHC signals are explained by an extra singlet scalar of the mass around 125GeV that slightly mixes with the SM Higgs heavier than 600GeV. When this scalar has a vacuum expectation value well beyond the electroweak scale, it can be identified as a linearly realized version of a dilaton field. Though the current experimental constraints from the Higgs search disfavors such a region, the singlet scalar model itself still provides a viable alternative to the SM Higgs in interpreting its search results.

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