Xing-Ning Wei | Searcharxiv

arXiv2017

Revisit assignments of the new excited $Ω_c$ states with QCD sum rules

In this article, we distinguish the contributions of the positive parity and negative parity $Ω_c$ states, study the masses and pole residues of the 1S, 1P, 2S and 2P $Ω_c$ states with the spin $J=\frac{1}{2}$ and $\frac{3}{2}$ using the QCD sum rules in a consistent way, and revisit the assignments of the new narrow excited $Ω_c^0$ states. The predictions support assigning the $Ω_c(3000)$ to be the 1P $Ω_c$ state with $J^P={\frac{1}{2}}^-$, assigning the $Ω_c(3090)$ to be the 1P $Ω_c$ state with $J^P={\frac{3}{2}}^-$ or the 2S $Ω_c$ state with $J^P={\frac{1}{2}}^+$, and assigning $Ω_c(3119)$ to be the 2S $Ω_c$ state with $J^P={\frac{3}{2}}^+$.

hep-ph↗

arXiv2017

Neutrino mass matrices with one texture equality and one vanishing neutrino mass

In the light of latest data of neutrino oscillation experiments, we carry out a systematic investigation on the texture structures of Majorana neutrino mass matrix $M_ν$, which contain one vanishing neutrino mass and an equality between two matrix elements. Among 15 logically possible patterns, it is found that for norm order ($m_{3}>m_{2}>m_{1}=0$) of neutrino masses only five of them are compatible with recent experimental data at the $3σ$ level, while for inverted order ($m_{2}>m_{1}>m_{3}=0$) ten patterns is phenomenologically allowed. In the numerical analysis, we perform a scan over the parameter space of all viable patterns to get a large sample of scattering points. We present the implications of each allowed pattern for three mixing angles $(θ_{12},θ_{2},θ_{3})$, leptonic CP violation and neutrinoless double-beta decay, predicting strong correlations between oscillation parameters. The theoretical realization of a concrete example is discussed in the framework of Froggatt-Nielsen mechanism.

hep-ph↗