arXiv subjects

W. J. Huo

Publications and source records attributed to W. J. Huo.

7 recordsLinked to original sources

arXiv2003

$B_{s,d} \to γγ$ Decay with the Fourth Generation

We calculate the branching ratios of $B_{s,d}\to γγ$ decay in the sequential fourth generation model. We find that the theoretical values of the branching ratios, ${\rm BR}(B_{s}\toγγ)$, including the contributions of $t'$, are much different from the minimal standard model (SM) predictions. The new physics contribution can provide one to two orders enhancement to the standard model prediction of ${\rm BR}(B_{s}\toγγ)$. But due to the tiny values of 4th generation CKM matrix element $V_{t'd}^* V_{t'b}$, the new physics effect on ${\rm BR}(B_{d}\toγγ)$ is very small and can not be distinct from the SM prediction. It is shown that the decay $B_s\to γγ$ can give the test of new physics signals from the 4th generation model.

hep-ph↗

arXiv2003

LFV decays and anomalous magnetic (electric) moments in a lepton mass matrices ansatz induced by SUSY GUT

By using the anomalous magnetic and electric dipole moments of the $τ$ lepton in an effective lagrangian approach to the new physics, we investigate the lepton flavor violation (LFV) decays, $l\to l'γ$, and $μ,τ$ anomalous magnetic and electric dipole moments in a lepton mass matrices ansatz which induced by SUSY GUT. We put very stringent constraints LFV decays and $τ$ anomalous magnetic and electric dipole moments.

hep-ph↗

arXiv2003

The anomalous lepton magnetic moment, LFV decays and the fourth generation

We investigate the lepton flavor violation (LFV) decays, $τ\to lγ$ ($l=μ, e$) and $μ\to eγ$, and the newly observed muon $g-2$ anomaly in the framwork of a squential fourth generation model with a heavy fourth neutrino, $ν'$. By using the recent experimental bounds, we take the constraints of the $4\times 4$ leptonic mixing matrix element factors, $|V_{1ν'} V_{2ν'}|^2$, $|V_{1ν'} V_{3ν'}|^2 $ and $|V_{3ν'} V_{2ν'}|^2$. We find that LFV decays and $g_μ-2$ can exclude most of the parameter space of the 4th generation neutrino mass $m_{ν'}$ and give stringent constraints on the existence of the fourth generation.

hep-ph↗

arXiv2002

Lepton flavor violation two-body decays of quarkoniums

In this paper we firstly study various model-independent bounds on lepton flavor violation (LFV) in processes of $J/Ψ$, $Ψ'$ and $Υ$ two-body decays, then calculate their branch ratios % By using the constraints from other ways, we obtain %the indirect bounds of ${\rm Br} (J/Ψ,Ψ',Υ\to ll')$ in models of the leptoquark, $R$ violating MSSM and topcolor assisted technicolor(TC2) models.

hep-ph↗

arXiv2002

Anomalous magnetic and electric moments of $τ$ and lepton flavor mixing matrix in effective lagrangian approach

In an effective lagrangian approach [EM97] to new physics, the authors in ref. [HL99] pushed tau anomalous magnetic and electric dipole moments (AMDM and EDM) down to $10^{-11}$ and $10^{-25} e cm$ by using a Fritzsch-Xing lepton mass matrix ansatz. In this note, we find that, in this approach, there exists the connection between $τ$ AMDM and EDM and the lepton flavor mixing matrix. By using the current neutrino oscillation experimental results, we investigate the parameter space of lepton mixing angles to $τ$ AMDM and EDM. We can obtain the same or smaller bounds of $δa_τ$ and $d_τ$ acquired in ref. [HL99] and constrain $θ_l$ (the mixing angle obtained by long-baseline neutrino oscillation experiments) from $τ$ AMDM and EDM.

hep-ph↗

arXiv2002

Constraints of mixing matrix elements in the sequential fourthgeneration model

We review our works on the sequential fourth generation model and focus on the constriants of $4\times 4$ quark mixing matrix elements. We investigate the quark mixing matrix elements from the rare $K,B$ meson decays. We talk about the $ hierarchy$ of the $4\times 4$ matrix and the existence of fourth generation.

hep-ph↗

arXiv2002

Constraints of the fourth generation from $g_μ-2$

We investigate the newly observed muon $g_μ-2$ anomaly in the framework of a sequential fourth generation model with a heavy fourth neutrino, $ν'$. We find that $g_μ-2$ can exclude most values of $m_{ν'}$ and put a very stringent constraint on the existence of the fourth generation. We also obtain bounds of a $4\times 4$ leptonic mixing matrix elements, $V_{2ν'}$ if it really exists.

hep-ph↗