分类： 物理学 >> 基本粒子与场物理学 提交时间： 2024-01-25
摘要： The purpose of this letter is to point out that some conclusions in the paper (Eur. Phys. J. C { bf 76}, 324(2016)) are incomplete, and to give complete and improved conclusions. The analytic necessary and sufficient conditions are given for the boundedness-from-below conditions of general scalar potentials of two real scalar fields $ phi_1$ and $ phi_2$ and the Higgs bonson $ mathbf{H}$.
分类： 物理学 >> 基本粒子与场物理学 提交时间： 2023-12-04
摘要： In this paper, the analytic sufficient and necessary conditions are obtained for the CP conserving two-Higgs-doublet potential to be bounded from below by using the co-positivity of tensors. This is achieved by treating the potential as a quartic homogeneous polynomial about the moduli of the two Higgs doublet fields, where the angles is described as the misalignment of the two doublets, then solving three minimum problems with respect to the misalignment. Finally, the analytic conditions are established with the help of the corresponding theory and methods of higher order tensors.
分类： 数字出版 >> 新媒体 提交时间： 2023-10-08 合作期刊: 《中国传媒科技》
摘要： 随着移动互联网的发展,具有"碎片化"特征的短视频迅速抓住用户眼球。短视频传播在满足用户信息获取、娱乐、社交等需求的同时,也存在传播内容虚假、传播内容恶俗和传播内容侵权等违法失德现象。尽管目前我国已在法律法规层面积极规避此类乱象,但仍存在法律制度改进滞后、法制监管不到位、技术使用不当等问题。为促进网络短视频的良性发展,应进一步完善网络短视频立法,利用智能审核、区块链等技术净化网络环境,与此同时,加大短视频治理宣传力度,加强对短视频内容生产者和用户的培训,提升其法治意识和媒介素养,实现网络短视频的长远发展。
分类： 数学 >> 数学物理 提交时间： 2021-06-16
摘要： In this paper, we mainly discuss the copositivity of 4th order symmetric tensor defined by scalar dark matter stable under a $\mathbb{Z}_{3}$ discrete group, and obtain an analytically necessary and sufficient condition of the copositivity of such a class of tensors. Furthermore, this analytic expression may be used to verify the vacuum stability for $\mathbb{Z}_{3}$ scalar dark matter.
分类： 数学 >> 数学物理 提交时间： 2020-11-23
摘要： In this paper, we mainly discuss analytical expressions of positive definiteness for a special 4th order 3-dimensional symmetric tensor defined by the constructed model for a physical phenomenon. Firstly, an analytically necessary and sufficient conditions of 4th order 2-dimensional symmetric tensors are given to test its positive definiteness. Furthermore, by means of such a result, a necessary and sufficient condition of positive definiteness is obtained for a special 4th order 3-dimensional symmetric tensor. Such an analytical conditions can be used for verifying the vacuum stability of general scalar potentials of two real singlet scalar fields and the Higgs boson. The positive semi-definiteness conclusions are presented too.
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