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vh@ nnlo-v2:希格斯辐射中的新物理学

vh@nnlo-v2: New physics in Higgs Strahlung

Robert V. Harlander, Jonas Klappert, Stefan Liebler, Lukas Simon

摘要:

介绍第2版的代码vh@nnlo,我们研究了一些新的物理场景的希格斯-Strahlung过程的影响。特别是,截面内的一般2 HDM和MSSM的评价。虽然Drell-Yan-like的贡献始终考虑到一个简单的重新标度的SM结果,胶子发起的贡献是补充方环介导的振幅,并通过$s$通道交换额外的标量,这可能会导致显着的干扰效应。后者也适用于底夸克引发的Higgs Strahlung,这也包含在新版本的vh@nnlo中。在2 HDM和MSSM中使用三个希格斯CP本征态的正交旋转,vh@nnlo在这些模型中采用了一种简单的CP混合方法。此外,还可以研究类矢量夸克对胶子引发贡献的影响。除了具体的模型之外,vh@nnlo还允许包含高维算子对CP偶希格斯玻色子产生的影响。可以研究末态希格斯玻色子的横动量分布和$Vϕ$末态的不变质量分布,以及胶子和底夸克引发的贡献。Higgs-Strahlung的Drell-Yan-like分量的分布可以通过MCFM的链接包括在内。vh@nnlo也可以与FeynHiggs和2 HDMC联系起来,用于计算Higgs质量和混合角。它还可以从标准光谱发生器产生的SLHA文件中读取这些参数。在整个手稿中,我们强调了各种数值例子中的新物理效应,无论是在包容性水平还是在分布上。

英文摘要:

Introducing version 2 of the code vh@nnlo, we study the effects of a number of new-physics scenarios on the Higgs-Strahlung process. In particular, the cross section is evaluated within a general 2HDM and the MSSM. While the Drell-Yan-like contributions are consistently taken into account by a simple rescaling of the SM result, the gluon-initiated contribution is supplemented by squark-loop mediated amplitudes, and by the $s$-channel exchange of additional scalars which may lead to conspicuous interference effects. The latter holds as well for bottom-quark initiated Higgs Strahlung, which is also included in the new version of vh@nnlo. Using an orthogonal rotation of the three Higgs CP eigenstates in the 2HDM and the MSSM, vh@nnlo incorporates a simple means of CP mixing in these models. Moreover, the effect of vector-like quarks in the SM on the gluon-initiated contribution can be studied. Beyond concrete models, vh@nnlo allows to include the effect of higher-dimensional operators on the production of CP-even Higgs bosons. Transverse momentum distributions of the final state Higgs boson and invariant mass distributions of the $Vϕ$ final state for the gluon- and bottom-quark initiated contributions can be studied. Distributions for the Drell-Yan-like component of Higgs-Strahlung can be included through a link to MCFM. vh@nnlo can also be linked to FeynHiggs and 2HDMC for the calculation of Higgs masses and mixing angles. It can also read these parameters from an SLHA-file as produced by standard spectrum generators. Throughout the manuscript, we highlight new-physics effects in various numerical examples, both at the inclusive level and for distributions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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