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大型强子对撞机第一轮运行后的非均匀超对称破缺模型2

The NUHM2 after LHC Run 1.

作者信息

Buchmueller O, Cavanaugh R, Citron M, De Roeck A, Dolan M J, Ellis J R, Flächer H, Heinemeyer S, Malik S, Marrouche J, Martínez Santos D, Olive K A, de Vries K J, Weiglein G

机构信息

High Energy Physics Group, Blackett Laboratory, Imperial College, Prince Consort Road, London, SW7 2AZ UK.

Fermi National Accelerator Laboratory, P.O. Box 500, Batavia, IL 60510 USA ; Physics Department, University of Illinois at Chicago, Chicago, IL 60607-7059 USA.

出版信息

Eur Phys J C Part Fields. 2014;74(12):3212. doi: 10.1140/epjc/s10052-014-3212-9. Epub 2014 Dec 17.

Abstract

We make a frequentist analysis of the parameter space of the NUHM2, in which the soft supersymmetry (SUSY)-breaking contributions to the masses of the two Higgs multiplets, [Formula: see text], vary independently from the universal soft SUSY-breaking contributions [Formula: see text] to the masses of squarks and sleptons. Our analysis uses the MultiNest sampling algorithm with over [Formula: see text] points to sample the NUHM2 parameter space. It includes the ATLAS and CMS Higgs mass measurements as well as the ATLAS search for supersymmetric jets + [Formula: see text] signals using the full LHC Run 1 data, the measurements of [Formula: see text] by LHCb and CMS together with other B-physics observables, electroweak precision observables and the XENON100 and LUX searches for spin-independent dark-matter scattering. We find that the preferred regions of the NUHM2 parameter space have negative SUSY-breaking scalar masses squared at the GUT scale for squarks and sleptons, [Formula: see text], as well as [Formula: see text]. The tension present in the CMSSM and NUHM1 between the supersymmetric interpretation of [Formula: see text] and the absence to date of SUSY at the LHC is not significantly alleviated in the NUHM2. We find that the minimum [Formula: see text] with 21 degrees of freedom (dof) in the NUHM2, to be compared with [Formula: see text] in the CMSSM, and [Formula: see text] in the NUHM1. We find that the one-dimensional likelihood functions for sparticle masses and other observables are similar to those found previously in the CMSSM and NUHM1.

摘要

我们对非通用次最小超对称标准模型(NUHM2)的参数空间进行了频率分析,其中两个希格斯多重态质量的软超对称(SUSY)破缺贡献[公式:见原文]与夸克和轻子质量的通用软超对称破缺贡献[公式:见原文]独立变化。我们的分析使用具有超过[公式:见原文]个点的MultiNest采样算法来对NUHM2参数空间进行采样。它包括ATLAS和CMS的希格斯质量测量,以及ATLAS使用大型强子对撞机(LHC)运行1的完整数据对超对称喷注+[公式:见原文]信号的搜索、LHCb和CMS对[公式:见原文]的测量以及其他B物理可观测量、电弱精确可观测量,还有XENON100和LUX对与自旋无关的暗物质散射的搜索。我们发现,NUHM2参数空间的优选区域在大统一理论(GUT)尺度下夸克和轻子的软超对称破缺标量质量平方[公式:见原文]以及[公式:见原文]为负。在非通用最小超对称标准模型(CMSSM)和NUHM1中,[公式:见原文]的超对称解释与LHC迄今未发现超对称之间存在的紧张关系在NUHM2中并未得到显著缓解。我们发现,NUHM2中具有21个自由度(dof)的最小[公式:见原文],可与CMSSM中的[公式:见原文]以及NUHM1中的[公式:见原文]相比较。我们发现,超粒子质量和其他可观测量的一维似然函数与之前在CMSSM和NUHM1中发现的值相似。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3f64/4423890/87408795a03c/10052_2014_3212_Fig1_HTML.jpg

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