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arXiv 2401.15465hep-ph
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具有标量隔离的超对称

Supersymmetry with scalar sequestering

Howard Baer, Vernon Barger, Dakotah Martinez

AI总结:

本研究针对带强相互作用超共形隐藏区的超对称模型,编写代码计算超粒子质量谱并施加多类物理约束,发现隐藏区主导MSSM跑动时可行参数空间极少,非普适戈戈诺质量下可找到低精细调节的大μ可行谱。

摘要:

带有强相互作用超共形隐藏区(HS)的超对称模型,可能会在某个中间能标下将软超对称破缺标量质量、双线性软项Bμ以及希格斯组合量m_{H_{u,d}}^2+μ^2驱动至较小数值,尽管超势中存在较大的μ参数,仍能产生独特的超粒子质量谱,同时可能降低精细调节程度。我们编写了一套计算机代码来计算这类质量谱,随后对其施加多种约束条件:1. 标量势中可能存在的电荷或色破缺(CCB)极小值;2. 标量势无下界(UFB);3. 电弱对称性破缺不恰当;4. 带电粒子或中微子超对称伙伴为最轻超对称粒子(LSP);5. 产生约125 GeV的希格斯质量m_h;6. 与大型强子对撞机(LHC)的超粒子质量限制相符;7. 自然性要求。我们发现,对于隐藏区动力学主导最小超对称标准模型(MSSM)重整化群跑动的情形,即便考虑非普适的戈戈诺质量,这一系列约束也几乎未留下可行的参数空间。对于隐藏区跑动强度适中、与MSSM跑动相当且戈戈诺质量普适的情形,精细调节程度有所改善,但仍然较高。对于非普适戈戈诺质量的情形,能够找到隐藏区跑动适中、低精细调节且大μ值的可行质量谱。

英文摘要:

Supersymmetric models with a strongly interacting superconformal hidden sector (HS) may drive soft SUSY breaking scalar masses, bilinear soft term Bμand Higgs combinations m_{H_{u,d}}^2+μ^2 to small values at some intermediate scale, leading to unique sparticle mass spectra along with possibly diminished finetuning in spite of a large superpotential $μ$ parameter. We set up a computer code to calculate such spectra, which are then susceptible to a variety of constraints: 1. possible charge-or-color breaking (CCB) minima in the scalar potential, 2. unbounded from below (UFB) scalar potential, 3. improper electroweak symmetry breaking, 4. a charged or sneutrino lightest SUSY particle (LSP), 5. generating m_h~ 125 GeV, 6. consistency with LHC sparticle mass limits, and 7. naturalness. We find this bevy of constraints leaves little or no viable parameter space for the case where hidden sector dynamics dominates MSSM running, even for the case of non-universal gaugino masses. For the case with moderate HS running with comparable MSSM running, and with universal gaugino masses, then the finetuning is ameliorated, but nonetheless remains high. Viable spectra with moderate HS running and with low finetuning and large mu can be found for non-universal gaugino masses.

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