Re-study on the contribution of scalar potential and spectra of $c\bar c$, $b\bar b$ and $b\bar c(\bar b c)$ families

Z'-> ggg decay in left-right symmetric models with three and four fermion families

We study the Z'-> ggg decay in the context of a left-right symmetric gauge theory. We obtain a branching ratio BR(Z'-> ggg)=Γ(Z'->ggg)/ Γ(Z'-> q\bar{q})= (1.2-2.8) x 10^{-5} for m_{Z'}=(700-1500) GeV. We also study the contribution of a fourth fermion family. We find an enhancement in the branching ratio for Z' masses close to the \bar{b'}b' threshold and a dip for Z' masses close to the \bar{t'}t' threshold. Using the values of the fourth generation quark masses allowed by electroweak precision data we obtain a branching ratio BR(Z'-> ggg)= (1-6)x 10^{-5} for m_{Z'}=(700-1500) GeV.

Standard-Model-like Chiral Spectra and the Origin of the Families

We outline our approach to understand the family structure through the idea of a SM-like chiral fermion spectrum, one that is derivable from anomaly cancellation conditions in the same way as the one family SM, under an extended symmetry, which after breaking to the SM symmetry yields the three families as the residual chiral content. An example of a relatively simple scalar sector which gives an acceptable symmetry breaking pattern and naturally hierarchical quark mass matrices is also discussed for a successful $SU(4)_A\otimes SU(3)_C\otimes SU(2)_L\otimes U(1)_X$ model. This is a summary of…

Nucleons and higher spin baryon resonances: an AdS/QCD configurational entropic incursion

Families of $J^P=1/2+$ nucleons (N(939), N(1440), N(1710), N(1880), N(2100), N(2300)) and $J^P=3/2-$ nucleons (N(1520), N(1700), N(1875) and N(2120)) are scrutinized from the point of view of the configurational entropy (CE). The mass spectra of higher $J^P$ resonances in each one of these families are then obtained when configurational-entropic Regge trajectories, that relate the CE of nucleon families to both their $J^P$ spin and also to their experimental mass spectra, are interpolated. The mass spectra of the next generation of nucleon resonances are then compared to already established ba…

Heavy flavor baryon spectra via QCD sum rules

In this talk, we give a short review of our recent works on studying the singly heavy baryon, doubly heavy baryon, and triply heavy baryon spectra from QCD sum rules.

有限温度下AdS/QCD中高自旋轻味重子谱学

Higher-spin light-flavor baryonic spectroscopy in AdS/QCD at finite temperature

本文在有限温度软墙AdS/QCD模型中研究轻味重子高自旋共振态，构建Regge轨迹外推质量谱，发现构型熵在T>38 MeV时剧增，并支持接近Hagedorn温度处发生相变。

Informational entropic Regge trajectories of meson families in AdS/QCD

Bulk mesons propagating in chiral and gluon condensates, in a gravity background, are scrutinized in holographic soft wall AdS/QCD models, involving deformed dilatonic backgrounds. The configurational entropy of the $a_1$ axial vector, the $ρ$ vector, and the $f_0$ scalar meson families is then computed. Two types of informational entropic Regge trajectories are then obtained, where the logarithm of the mesons configurational entropy is expressed in terms of both the experimental meson mass spectra and their excitation number as well. Therefore the mass spectra of the next generation of elemen…