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arXiv 1111.1239hep-phhep-th
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MFV SUSY:R-宇称破坏的自然理论

MFV SUSY: A Natural Theory for R-Parity Violation

Csaba Csáki, Yuval Grossman, Ben Heidenreich

摘要:

我们提出了一种替代的方法来低能量超对称性。而不是强加的R-奇偶校验,我们应用最小的味道违反(MFV)的假设R-奇偶违反MSSM。在这个框架中,我们称之为MFV超对称性,方夸克可以是轻的,质子可以长寿,而不会在大型强子对撞机上产生丢失的能量信号。我们的方法不同于Nikolidakis和Smith的方法,因为我们对MFV spurions施加了全纯性。由此产生的模型是高度约束和R-宇称出现作为一个偶然的近似对称的低能量拉格朗日。小的R宇称违反项的大小由味参数决定,在没有中微子质量的情况下,只有一个可重整化的R宇称违反相互作用:重子数违反$\bar{u}\bar{d}\bar{d}$超势项。低能观测量(质子衰变、双核子衰变和$n-\bar{n}$振荡)对参数空间的约束很小。LHC现象学将取决于LSP是夸克、中性伴子、电荷伴子还是slepton。如果LSP是一个夸克,它将有即时衰变,解释了在LHC没有观察到缺少横向能量的事件。

英文摘要:

We present an alternative approach to low-energy supersymmetry. Instead of imposing R-parity we apply the minimal flavor violation (MFV) hypothesis to the R-parity violating MSSM. In this framework, which we call MFV SUSY, squarks can be light and the proton long lived without producing missing energy signals at the LHC. Our approach differs from that of Nikolidakis and Smith in that we impose holomorphy on the MFV spurions. The resulting model is highly constrained and R-parity emerges as an accidental approximate symmetry of the low-energy Lagrangian. The size of the small R-parity violating terms is determined by the flavor parameters, and in the absence of neutrino masses there is only one renormalizable R-parity violating interaction: the baryon-number violating $\bar{u}\bar{d}\bar{d}$ superpotential term. Low energy observables (proton decay, dinucleon decay and $n-\bar{n}$ oscillation) pose only mild constraints on the parameter space. LHC phenomenology will depend on whether the LSP is a squark, neutralino, chargino or slepton. If the LSP is a squark it will have prompt decays, explaining the non-observation of events with missing transverse energy at the LHC.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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