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arXiv 1611.03312hep-ph
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在LHC上对cSMCS模型中希格斯玻色子产生的唯象研究

A phenomenological study on the production of Higgs bosons in the cSMCS model at the LHC

Neda Darvishi, Mohammad Reza Masouminia

摘要:

在目前的工作中,我们打算预测希格斯玻色子的生产率在最简单的扩展标准模型(SM)的中性复杂单态(cSMCS)。该模型增加了CP破坏源,并提供了足够强的一级电弱相变,产生了重子宇宙不对称性。cSMCS的标量谱包括三个中性希格斯粒子,其中最轻的一个被认为是在LHC发现的125 GeV的希格斯玻色子。类SM的希格斯玻色子玻色子大部分来自类SM的SU(2)双重态,受到单重态的少量修正。为了预测希格斯玻色子玻色子的产生率,我们采用了传统的有效LO QCD框架和Kimber-Martin-Ryskin(KMR)的未积分部分子分布函数(UPDF).我们首先计算SM Higgs产生截面,并将结果与来自不同框架的现有理论计算以及CMS和ATLAS合作的实验数据进行比较。结果表明,我们的框架是能够产生的声音预测这些高能QCD事件的SM。之后,我们提出了我们的预测希格斯玻色子生产的cSMCS。

英文摘要:

In the present work, we intend to predict the production rates of the Higgs bosons in the simplest extension of the Standard Model (SM) by a neutral complex singlet (cSMCS). This model has an additional source of CP violation and provides strong enough first-order electroweak phase transition to generate the baryon asymmetry of universe (BAU). The scalar spectrum of the cSMCS includes three neutral Higgs particles with the lightest one considered to be the 125 GeV Higgs boson found at LHC. The SM-like Higgs boson comes mostly from the SM-like SU(2) doublet, with a small correction from the singlet. To predict the production rates of the Higgs bosons, we use a conventional effective LO QCD framework and the unintegrated parton distribution functions (UPDF) of Kimber-Martin-Ryskin (KMR). We first compute the SM Higgs production cross-section and compare the results to the existing theoretical calculations from different frameworks as well as the experimental data from the CMS and ATLAS collaborations. It is shown that our framework is capable of producing sound predictions for these high-energy QCD events in the SM. Afterwards we present our predictions for the Higgs boson production in the cSMCS.

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