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arXiv 1508.04068hep-phhep-th
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有效的MSSM

The Effective MSSM

Archil Kobakhidze, Matthew Talia

摘要:

我们提出了一个有效场论框架来讨论偏离最小超对称标准模型(MSSM),这是基于规范希格斯扇区的替代安排。在这个有效MSSM(EffMSSM)中,非线性实现的$SU(2)\times U(1)$规范扇区被描述为一个$SU(2)\times U(1)$值的质量矢量超场,其中包含一个中性CP偶场和一个带电Higgs场,而另一个中性CP偶Higgs场和一个中性CP奇Higgs场则驻留在一个$SU(2)\times U(1)$单重手征超场中.虽然新理论包含与传统MSSM相同的粒子内容,但超场的非传统表示允许新类型的相互作用,这可能导致对现象学的重大修改。作为一个说明性的例子,我们认为EffMSSM修改后的希格斯和电弱规范扇区增强的高吉诺软超对称性破缺质量,$M_i~ (i=1,2,3)$和标准希格斯软破缺质量,$m_{H_u}=m_{H_d}$和$B_μ$,并指出不同的特点,在希格斯和高吉诺部门相比,MSSM。特别是,我们表明,最轻的中性CP-甚至希格斯玻色子与质量$\sim 125$ GeV可以很容易地容纳在EffMSSM。

英文摘要:

We suggest an effective field theory framework to discuss deviations from the minimal supersymmetric Standard Model (MSSM) which is based on an alternative arrangement of the gauge-Higgs sector. In this effective MSSM (EffMSSM) nonlinearly realised $SU(2)\times U(1)$ gauge sector is described by an $SU(2)\times U(1)$-valued massive vector superfield, which contains a neutral CP-even and charged Higgs fields, while another neutral CP-even Higgs and the neutral CP-odd Higgs fields are residing in an $SU(2)\times U(1)$-singlet chiral superfield. Although the new theory contains the same particle content as the conventional MSSM, the unconventional representation of superfields allows for new type of interactions, which may lead to a significant modification of the phenomenology. As an illustrative example we consider EffMSSM with modified Higgs and electroweak gauge sector augmented by gaugino soft supersymmetry breaking masses, $M_i~ (i=1,2,3)$ and the Standard Higgs soft-breaking masses, $m_{H_u}=m_{H_d}$ and $B_μ$, and point out distinct features in the Higgs and gaugino sectors as compared to MSSM. In particular, we show that the lightest neutral CP-even Higgs boson with mass $\sim 125$ GeV can be easily accommodated within EffMSSM.

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