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arXiv 1111.7286hep-ph
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用低能SU(3)味对称模型对费米子质量和混合的预测

Predictions for fermion masses and mixing from a low energy SU(3) flavor symmetry model with a Light Sterile Neutrino

Albino Hernandez-Galeana

摘要:

本文报道了在SU(3)味对称模型中研究夸克和轻子(包括中微子)的费米子质量和混合的低能结果。在SU(3)味对称模型中,通过引入一组新的$SU(2)_L$弱单态矢量类费米子$U,D,E,N$,其中$N$是一种无菌中微子,从{ \bf Dirac See-saw}机制实现了普通重费米子、顶夸克和底夸克以及τ轻子在树水平上的质量。轻费米子从大质量SU(3)规范玻色子介导的单圈辐射修正获得质量。最近的结果表明,存在一个低能量的空间参数,该模型是能够容纳夸克质量和混合在一个$4\times 4$非幺正$V_{CKM}$以及带电轻子质量的已知频谱。受最近LSND和MiniBooNe短基线中微子振荡实验的启发,我们拟合了3+1方案下的中微子平方质量差$m_2^2 - m_1^2\approx 7.6\times 10^{-5}\;\text{eV}^2$,$m_3^2 - m_2^2\approx 2.43\times 10^{-3} \text{eV}^2$和$m_4^2 - m_1^2\approx 0.29 \text{eV}^2$ .该模型预测了$M_D=(350 - 900)GeV$范围内的类D矢量夸克质量和几TeV的水平规范玻色子质量。这些低能量的预测是在LHC的可能性之内。此外,上述方案使我们能够在现有的实验范围内同时抑制由这些额外的水平规范玻色子介导的$K^o-\bar{K^o}$和$D^o-\bar{D^o}$介子混合的树级$ΔF=2$过程。

英文摘要:

I report low energy results on the study of fermion masses and mixing for quarks and leptons, including neutrinos within a SU(3) flavor symmetry model, where ordinary heavy fermions, top and bottom quarks and tau lepton become massive at tree level from {\bf Dirac See-saw} mechanisms implemented by the introduction a new set of $SU(2)_L$ weak singlet vector-like fermions $U,D,E,N$, with $N$ a sterile neutrino. Light fermions obtain masses from one loop radiative corrections mediated by the massive SU(3) gauge bosons. Recent results shows the existence of a low energy space parameter where this model is able to accommodate the known spectrum of quark masses and mixing in a $4\times 4$ non-unitary $V_{CKM}$ as well as the charged lepton masses. Motivated by the recent LSND and MiniBooNe short-baseline neutrino oscillation experiments we fit for the 3+1 scenario the neutrino squared mass differences $m_2^2 - m_1^2\approx 7.6\times 10^{-5}\;\text{eV}^2$, $m_3^2 - m_2^2\approx 2.43\times 10^{-3} \text{eV}^2$ and $m_4^2 - m_1^2\approx 0.29 \text{eV}^2$. The model predicts the D vector like quark mass in the range $M_D=(350 - 900)GeV$ and horizontal gauge boson masses of few TeV. These low energy predictions are within LHC possibilities. Furthermore, the above scenario enable us to suppress simultaneously the tree level $ΔF=2$ processes for $K^o-\bar{K^o}$ and $D^o-\bar{D^o}$ meson mixing mediated by these extra horizontal gauge bosons within current experimental bounds.

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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