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arXiv 1602.00637hep-ph
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极小超对称左右模型的辐射破缺

Radiative Breaking of the Minimal Supersymmetric Left-Right Model

Nobuchika Okada, Nathan Papapietro

摘要:

本文研究了基于规范群$SU(3)_c\times SU(2)_L\times SU(2)_R\times U(1)_{BL}$的SUSY左右对称模型的一种变形。在夸克和轻子超场之外,我们只引入第二个希格斯双量子态来产生现实的费米子质量矩阵。该模型不包括任何$SU(2)_R$三联体。我们计算了从单圈到低能的软超对称参数的重整化群演化。我们发现$SU(2)_R$ slepton偶态在低能时获得负质量平方,因此$SU(2)_R\times U(1)_{BL}\rightarrow U(1)_Y$的破缺是通过右手中微子的非零真空期望值实现的.小质量的中微子是通过中微子与高吉诺混合产生的。在LHC直接搜索的结果,以及从LEP精密数据的轻子-高根混合边界上的$SU(2)_R\times U(1)_{BL}$部门的质量限制。

英文摘要:

We study a variation to the SUSY Left-Right symmetric model based on the gauge group $SU(3)_c\times SU(2)_L\times SU(2)_R\times U(1)_{BL}$. Beyond the quark and lepton superfields we only introduce a second Higgs bidoublet to produce realistic fermion mass matrices. This model does not include any $SU(2)_R$ triplets. We calculate renormalization group evolutions of soft SUSY parameters at the one-loop level down to low energy. We find that an $SU(2)_R$ slepton doublet acquires a negative mass squared at low energies, so that the breaking of $SU(2)_R\times U(1)_{BL}\rightarrow U(1)_Y$ is realized by a non-zero vacuum expectation value of a right-handed sneutrino. Small neutrino masses are produced through neutrino mixings with gauginos. Mass limits on the $SU(2)_R\times U(1)_{BL}$ sector are obtained by direct search results at the LHC as well as lepton-gaugino mixing bounds from the LEP precision data.

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