Bagnaschi E, Sakurai K, Borsato M, Buchmueller O, Citron M, Costa J C, De Roeck A, Dolan M J, Ellis J R, Flächer H, Heinemeyer S, Lucio M, Martínez Santos D, Olive K A, Richards A, Spanos V C, Suárez Fernández I, Weiglein G
1DESY, Notkestraße 85, 22607 Hamburg, Germany.
2Faculty of Physics, Institute of Theoretical Physics, University of Warsaw, ul. Pasteura 5, 02-093 Warsaw, Poland.
Eur Phys J C Part Fields. 2018;78(3):256. doi: 10.1140/epjc/s10052-018-5697-0. Epub 2018 Mar 24.
We use MasterCode to perform a frequentist analysis of the constraints on a phenomenological MSSM model with 11 parameters, the pMSSM11, including constraints from /fb of LHC data at 13 TeV and PICO, XENON1T and PandaX-II searches for dark matter scattering, as well as previous accelerator and astrophysical measurements, presenting fits both with and without the constraint. The pMSSM11 is specified by the following parameters: 3 gaugino masses , a common mass for the first-and second-generation squarks and a distinct third-generation squark mass , a common mass for the first-and second-generation sleptons and a distinct third-generation slepton mass , a common trilinear mixing parameter , the Higgs mixing parameter , the pseudoscalar Higgs mass and . In the fit including , a Bino-like is preferred, whereas a Higgsino-like is mildly favoured when the constraint is dropped. We identify the mechanisms that operate in different regions of the pMSSM11 parameter space to bring the relic density of the lightest neutralino, , into the range indicated by cosmological data. In the fit including , coannihilations with and the Wino-like or with nearly-degenerate first- and second-generation sleptons are active, whereas coannihilations with the and the Higgsino-like or with first- and second-generation squarks may be important when the constraint is dropped. In the two cases, we present functions in two-dimensional mass planes as well as their one-dimensional profile projections and best-fit spectra. Prospects remain for discovering strongly-interacting sparticles at the LHC, in both the scenarios with and without the constraint, as well as for discovering electroweakly-interacting sparticles at a future linear collider such as the ILC or CLIC.
我们使用MasterCode对具有11个参数的现象学MSSM模型（pMSSM11）的约束进行频率分析，其中包括来自13 TeV的大型强子对撞机（LHC）数据的/fb以及PICO、XENON1T和PandaX-II对暗物质散射的搜索约束，还有先前的加速器和天体物理测量结果，展示了有和没有该约束时的拟合情况。pMSSM11由以下参数指定：3个规范玻色子质量 ，第一代和第二代 squark的共同质量 以及不同的第三代squark质量 ，第一代和第二代 sleptons的共同质量 以及不同的第三代 slepton质量 ，一个共同的三线性混合参数 ，希格斯混合参数 ，赝标量希格斯质量 以及 。在包含 的拟合中，类似Bino的 是首选，而当去掉 约束时，类似Higgsino的 则略有优势。我们确定了在pMSSM11参数空间的不同区域起作用的机制，以使最轻中性伴随子 的遗迹密度进入宇宙学数据所指示的范围。在包含 的拟合中，与 和类似Wino的 或与近乎简并的第一代和第二代 sleptons的共湮灭是活跃的，而当去掉 约束时，与 和类似Higgsino的 或与第一代和第二代 squarks的共湮灭可能很重要。在这两种情况下，我们在二维质量平面中展示 函数以及它们的一维轮廓投影和最佳拟合谱。在大型强子对撞机上，无论有无 约束的情况下，都仍有发现强相互作用超粒子的前景，以及在未来的线性对撞机如国际直线对撞机（ILC）或紧凑线性对撞机（CLIC）上发现弱电相互作用超粒子的前景。
