arXiv subjects

M. Arroyo-Ureña

Publications and source records attributed to M. Arroyo-Ureña.

2 recordsLinked to original sources

arXiv2018

Searching for LFV Flavon decays at hadron colliders

The search for Flavons with a mass of $\mathcal{O}$(1) TeV at current and future colliders might probe low-scale flavor models. We are interested in the simplest model that invokes the Froggatt-Nielsen (FN) mechanism with an Abelian flavor symmetry, which includes a Higgs doublet and a FN complex singlet. Assuming a CP conserving scalar potential, there are a $CP$-even $H_F$ and a $CP$-odd $A_F$ Flavons with lepton flavor violating (LFV) couplings. The former can mix with the standard-model-like Higgs boson, thereby inducing tree-level LFV Higgs interactions that may be at the reach of the LHC. We study the constraints on the parameter space of the model from low-energy LFV processes, which are then used to evaluate the Flavon decay widths and the $gg\to ϕ\to τμ$ ($ϕ=H_F,\,A_F$) production cross section at hadron colliders. After imposing several kinematic cuts to reduce the SM main background, we find that for $m_{H_F}$ about 200-350 GeV, the decay $H_F \to τμ$ might be at the reach of the LHC for a luminosity in the range 1-3 ab$^{-1}$, however, a luminosity of the order of 10 ab$^{-1}$ would be required to detect the $A_F \to τμ$ decay. On the other hand a future 100 TeV $pp$ collider could probe masses as high as $\mathcal{O}$(10) TeV if it reaches an integrated luminosity of at least 20 ab$^{-1}$. Therefore, the 100 TeV Collider could work as a Flavon factory.

hep-ph↗

arXiv2015

Dipole moments of charged leptons in the THDM-III with Textures

We study the magnetic and weak magnetic dipole moments of charged leptons in the framework of the Two Higgs Doublet Model type III (THDM-III) with four zero textures. We first analyze the possibility that the discrepancy between the experimental measurements and the theoretical prediction of the muon anomalous magnetic dipole moment ($a_μ$) in the Standard Model (SM) can be explained in the context of the model and then find values for the parameters of the THDM-III: neutral and charged Higgs boson masses ($m_{H}$, $m_{H^{\pm}}$), mixing angles ($α, β$), CP-violating angles $θ_1,\,θ_2$ and an additional parameter arising from the mass matrix ($γ_f$), for which a correspondence between theory and experiment is possible. We use $a_μ^{THDM-III}$ and current low energy processes $K-\bar{K}$ mixing, $B_s^0\toμ\barμ$, $τ\toμμ\barμ$, $μ\to e e \bar e$, $τ\to μγ$, $τ\to eγ$, $μ\to e γ$, $b\to sγ$, $B\to D (D^*) τν$ and the rare higgs decay $h\toτμ$ in order to determine the allowed parameter space of THDM-III and from these we give a prediction for the magnetic and weak magnetic dipole moment of charged leptons, in particular of the $τ$ lepton. The obtained magnetic dipole moment of the $τ$ lepton is of the order of $\mathcal{O}(10^{-8}-10^{-7})$ and the weak magnetic is of the order $\mathcal{O}(10^{-10}-10^{-7})$.

hep-ph↗