新物理下由膠子生成的希格斯粒子

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2016

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標準模型希格斯玻色子的存在是由歐洲核子研究中心的實驗證實,其質量發現是125 GeV的。其由主導膠子膠子融合通道生產橫截面可以通過利用低能量定理,這是有效的或超出標準模型可以容易地記錄下來。本文異國情調的費米子和標量來希格斯生產的影響考慮。在這些模型中,將有其它的用貢獻由費曼圖希格斯產幅度在其中的膠子 - 膠子融合過程中的頂夸克圈被這些外來顆粒循環取代。類似的斷言保持希格斯玻色子的兩個伽瑪衰變通道,通過該模型的預測可以檢查,如果數據改善未來的實驗。
The existence of the Standard Model Higgs boson was verified by CERN experiments, with its mass found to be 125 GeV. Its production cross section by the dominant gluon-gluon fusion channel can be readily written down by making use of low-energy theorems, which are valid in or beyond the Stan- dard Model. In this thesis the effects of exotic fermions or scalars to Higgs productions are considered. In these models, there would be additional con- tributions to the Higgs production amplitude by Feynman diagrams in which the top quark loops in the gluon-gluon fusion process are replaced by these exotic particle loops. Similar assertions hold for the two gamma decay chan- nel of the Higgs boson, by means of which the predictions of the models can be checked, if statistics improves in future experiments.

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希格斯粒子, 新物理, Higgs production, Gluon fusion, New physics

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