The R-parity conserving MSSM in light of the decay $B_s\rightarrowμ^+μ^-$ with near-SM branching ratio is an interesting platform for studying the complementarity between direct and indirect searches for beyond the SM physics. Based on this, we have analysed the possible impact of the $B_s\rightarrowμ^+μ^-$ observation on the posterior sample from the global fit of a 30-parameter MSSM (MSSM-30), and the related Wilson Coefficients. The MSSM-30 is a systematically constructed, symmetry-guided, MSSM parametrization, as opposed to the traditional frames (e.g. pMSSM) with crude treatment of flavor violation parameters. This paper illustrates why phenomenological frames like the MSSM-30 should be preferred to study flavor physics. For the current and future B-physics experimental precision, such a consideration is crucial for suitably assessing supersymmetric contributions to flavor observables.
We considered the new signature of a charged Higgs boson, $pp\rightarrow H^{\pm}h\rightarrow W^{\pm}hh$, which is almost background free as the promising to study of supersymmetry at the LHC with both $\sqrt{s} = 13$ TeV and $\sqrt{s}= 14$ TeV. In the framework of MSSM model we used the latest theoretical parameter space, which is consistent with the experimental constraints from Large Hadron Collider and direct or indirect searches. In the surviving regions with the help of Pythia 8.3 and Feynhiggs programs it was found that production cross sections, $σ(pp\rightarrow H^{\pm}h)$, and Branchin…
The Quark Flavor Violating Higgs Decay $h \rightarrow \bar b s + b \bar s$ in the MSSM
研究了最小超对称标准模型中夸克味破坏的Higgs玻色子衰变$h \rightarrow \bar b s + b \bar s$.首先在独立模型中分析衰减，然后在第二步中在最小味道违反（MFV）约束MSSM中分析衰减。从$B$ -物理观测量（BPO）和电弱精密观测量（EWPO）的实验约束也计算和施加在参数空间。结果表明，在某些情况下，EWPO比BPO更强地限制了味道违反参数空间。在模型中，可找到${\rm BR}(h \rightarrow \bar b s + b \bar s)$的${\cal O}(10^{-4})$独立分析值。在MFV CMSSM中，这样的结果只能在参数空间的非常有限的部分中获得。结果表明，不排除在未来的$e^+e^-$对撞机上观察到MSSM中的$h \rightarrow \bar b s + b \bar s$衰变。
$U(1)_X$SSM is the extension of the minimal supersymmetric standard model (MSSM) and its local gauge group is $SU(3)_C\times SU(2)_L \times U(1)_Y \times U(1)_X$. We study lepton flavor violating (LFV) decays $Z\rightarrow{{l_i}^{\pm}{l_j}^{\mp}}$($Z\rightarrow eμ$, $Z\rightarrow eτ$, and $Z\rightarrow μτ$) and $h\rightarrow{{l_i}^{\pm}{l_j}^{\mp}}$($h\rightarrow eμ$, $h\rightarrow eτ$, and $h\rightarrow μτ$), in this model. In the numerical results, the branching ratios of $Z\rightarrow{{l_i}^{\pm}{l_j}^{\mp}}$ are from $10^{-9}$ to $10^{-13}$ and the branching ratios of $h\rightarrow{{l_i}^{…
Inspired by the recent experimental results which show deviations from the standard model (SM) predictions of $b\rightarrow s \ell^+\ell^-$ transitions, we study the $R$-parity violating minimal supersymmetric standard model (RPV-MSSM) extended by the inverse seesaw mechanism. The trilinear $R$-parity violating terms, together with the chiral mixing of sneutrinos, induce the loop contributions to the $b\rightarrow s \ell^+\ell^-$ anomaly. We study the parameter space of the single-parameter scenario $C^{\rm NP}_{9,μ}=-C^{\rm NP}_{10,μ}=C_{\rm V}$ and the double-parameter scenario $(C_{\rm V},C…
Understanding the correlation between $(g-2)_μ$ and $μ\rightarrow e γ$ in the MSSM
μ子反常磁矩$a_μ$和衰变$μ\to eγ$的超对称贡献由非常相似的费曼图给出。以前的作品报告的相关性在特定的情况下，特别是如果$a_μ$是由一个单一的图表为主。在这项工作中，我们给出了广泛的调查可能的相关性。我们讨论的例子，单图支配特别强的相关性，并提供相应的基准参数点。我们展示了相关性是如何被削弱的MSSM参数空间的大部分图之间的显着取消。然而，对于固定的风味破坏参数，$\text{BR}(μ\to e γ)$的数量级通常可以预测。我们总结的行为，绘制的相关性，以及由此产生的界限上的味道违反参数的各种假设下的MSSM频谱。
We study the non-leptonic puzzle of $B_{d(s)} \rightarrow K^{(\ast)}\bar{K}^{(\ast)}$ decay in the $R$-parity violating minimal supersymmetric standard model (RPV-MSSM) extended with the inverse seesaw mechanism. In this model, the chiral flip of sneutrinos can contribute to the observables $L_{K\bar{K}}$ and $L_{K^{\ast}\bar{K}^{\ast}}$, that is benefit for explaining the relevant puzzle. We also find that this unique effect can engage in the $B_s$-$\bar{B}_s$ mixing. We utilize the scenario of complex $λ^\prime$ couplings to fulfill the recent stringent constraint of $B_s$-$\bar{B}_s$ mixing…
Till today lepton flavor violation has not been observed in processes involving charged leptons. Hence, a search for it is under hot pursuit both in theories and experiments. In our current work, we investigate the rates of rare decay processes such as $τ\rightarrow μγ$ in SU(5) SUSY GUT and found that it satisfies the current bound and is one order below the projected sensitivity. This gives a corroborative argument for the influence of the large top-Yukawa coupling at the GUT scale ($λ_{tG}$) on flavor violating decay rates of leptons which are investigable at low energy electroweak scale $M…
$U(1)_X$SSM is the extension of the minimal supersymmetric standard model(MSSM) and its local gauge group is $SU(3)_C\times SU(2)_L \times U(1)_Y \times U(1)_X$. To obtain this model, three singlet new Higgs superfields and right-handed neutrinos are added to MSSM. In the framework of $U(1)_X$SSM, we study lepton flavor violating decays $τ\rightarrow{Pl}(P=π,~η,~η^\prime;~l=μ,~e)$. According to the latest experimental data of $τ\rightarrow{Pe}$ and $τ\rightarrow{Pμ}$, the influence of different sensitive parameters on the results is analyzed to make a reasonable prediction for future experimen…
Higgs Masses and More in the Complex MSSM with FeynHiggs
我们提出了最新版本2.6的FeynHiggs，用于计算MSSM希格斯玻色子质量和相关观测值，如混合角，分支比和耦合，包括国家的最先进的高阶贡献的程序。其中最重要的新特点是引入了全复O（α t α s）双圈修正，这使得FeynHiggs在费曼图解法中给出了迄今为止最精确的复MSSM中Higgs质量的计算.
In this article, we study the two body gluino decays $\tilde{g} \rightarrow \tilde{u}_i \bar{u}_g$, $\tilde{g} \rightarrow \tilde{d}_i \bar{d}_g$ with $i=1,2,...6$ and $g=1,2,3$ in the Minimal Supersymmetric Standard Model (MSSM) with quark flavour violation (QFV). At the outset, constraints on QFV parameters $δ_{ij}^{U/D(LR)}$ and $δ_{ij}^{U/D(RL)}$ with $i,j=1,2,3$ and $(i\neq j) $ are calculated for a specific set of MSSM parameters using charge and color breaking minima (CCB) and unbounded from below minima (UFB) conditions. These constraints are more stringent compared to the constraints …
我们提出了最新版本的micromegas，一个代码，计算MSSM中最轻的超对称粒子的遗迹密度。所有的树级过程的LSP的湮灭，以及所有可能的coannihilation过程与中性伴子，charginos，slepton，squarks和胶子。从CalcHEP中提取的横截面使用SUSY Les Houches Accord中规定的循环校正质量和混合精确计算。热平均值的相对论公式被使用，并且通过采用特定的积分例程来处理极点和阈值。输入参数可以是一般MSSM中的软SUSY参数，也可以是在某个高尺度（GUT）下指定的SUGRA模型的参数。在后一种情况下，与嫌疑人，Softsusy，Spheno和Isajet的联系允许计算超对称光谱，希格斯质量以及混合矩阵。高阶修正希格斯耦合夸克对，包括QCD以及一些超对称修正（deltaMb）的实施。还包括计算（g-2）、bsgamma和bsmumu的算法。特别是bsgamma例程包括一个改进的非线性光学的SM和带电的希格斯粒子，而超对称大tan（β）的影响超出领先的顺序。这个新版本还提供了任何2->2过程的截面以及MSSM中两体末态的部分衰变宽度，从而可以在对撞机上轻松模拟。
