arXiv subjects

Wujun Huo

Publications and source records attributed to Wujun Huo.

4 recordsLinked to original sources

arXiv2011

New Physics effects on decay $B_s \to γγ$ in Technicolor Model

In this paper we calculate the contributions to the branching ratio of $B_s \to γγ$ from the charged Pseudo-Goldstone bosons appeared in one generation Technicolor model. We find that the theoretical values of the branching ratio, $BR(B_s\toγγ)$, including the contributions of PGBs, $P^\pm$ and $P^{\pm}_8$, are much different from the $SM$ prediction. The new physics effects can be enhance 2-3 levels to $SM$ result. It is shown that the decay $B_s\to γγ$ can give the test the new physics signals from the technicolor model.

hep-ph↗

arXiv2003

$b\to s γ$ in Littlest Higgs Model

The inclusive process $b \to s γ$ is studied in the littlest Higgs model. The contributions arising from new particles are normally suppressed by a factor of $O(v^2/f^2)$. Due to the large uncertainties of experimental measurements and theoretical predictions, the model parameters can escape from the constraints of present experiments provided $f \ge 1$ TeV.

hep-ph↗

arXiv2003

Technicolor corrections on $B_{s,d} \to γγ$ decays in QCD factorization

Within the framework of the Top-color-assisted Technicolor (TC2) model, we calculate the new physics contributions to the branching ratios $\calb(B_{s,d} \to γγ)$ and CP violating asymmetries $\rcpm(B_{s,d} \to γγ)$ in the QCD factorization based on the heavy-quark limit $m_b \gg Λ_{QCD}$. Using the considered parameter space, we find that (a) for both $B_s\to γγ$ and $B_d \to γγ$ decays, the new physics contribution can provide a factor of two to six enhancement to their branching ratios, (b) for the $B_s \to γγ$ decay, its direct CP violation is very small in both the SM and TC2 model, and (c) the CP violating asymmetry $\rcpm(B_d \to γγ)$ is around the ten percent level in both the SM and TC2 model, but the sign of CP asymmetry in the TC2 model is different from that in the SM.

hep-ph↗

arXiv2002

$σ$ Meson In $J/Ψ$ Decays

Recently BES at BEPC found evidence for the existence of the $σ$ meson in the process of $J/Ψ\to σω\toππω$. In this paper we firstly discuss the relevant coupling $g_{σππ}$ and show that the linear $σ$ model gives rise to a reasonable description of the $σ$ decay into $π$'s, then we calculate the coupling constant $g^{th}_{J/Ψσω}$ by using the perturbative QCD technique and the light-cone wave functions of the $σ$ and $ω$ mesons. The results show that the theoretical value of $g^{th}_{J/Ψσω}$ is within the range of experimental value $g_{J/Ψσω}$.

hep-ph↗