G. Hern'andez-Tom'e

activity

20132022

τ \to π (K) ν_{τ} [γ]

: a reliable new physics test

29 citations · 109 across the 11 of their papers we have counts for

collaborators

11 papers

hep-ph2022★ 5 cited

Resonant Majorana neutrino effects in $Δ$ L=2 four-body hyperon decays

Gerardo Hernández-Tomé, Diego Portillo-Sánchez, Genaro Toledo

We computed the $Σ^{-} \to n π^{+} e^{-} ℓ^{-}$ ( $ℓ = e, μ$ ), $Ξ^{-} \to Λ π^{+} e^{-} e^{-}$ , and $Λ \to p π^{+} e^{-} e^{-}$ lepton number violating (LNV) hyperon decays mediated by a resonant Majorana neutr…

hep-ph2021★ 6 cited

$Δ$ L=2 hyperon decays induced by Majorana neutrinos and doubly-charged scalars

G. Hernández-Tomé, G. López Castro, D. Portillo-Sánchez

Searches for $Δ L = 2$ decays are crucial to disentangle the Dirac vs Majorana nature of neutrinos. While neutrinoless nuclear double beta decays are the most promising tool to look f…

hep-ph2021★ 15 cited

One-loop determination of $τ \to π (K) ν_{τ} [γ]$ branching ratios and new physics tests

M. A. Arroyo-Ureña, G. Hernández-Tomé, G. López-Castro +2

We calculate the ratios $R_{τ / P} \equiv Γ (τ \to P ν_{τ} [γ]) /Γ (P \to μ ν_{μ} [γ])$ ( $P = π, K$ ) at one loop following a large- $N_{C}$ expansion where Chiral Perturbatio…

hep-ph2021★ 29 cited

Radiative corrections to $τ \to π (K) ν_{τ} [γ]$ : a reliable new physics test

M. A. Arroyo-Ureña, G. Hernández-Tomé, G. López-Castro +2

The ratios $R_{τ / P} \equiv Γ (τ \to P ν_{τ} [γ]) /Γ (P \to μ ν_{μ} [γ])$ ( $P = π, K$ ) provide sensitive tests of lepton universality $∣ g_{τ} / g_{μ} ∣ = 1$ and are a useful tool for new physi…

hep-ph2021★ 2 cited

Neutrino events within muon bundles at neutrino telescopes

Miguel Gutiérrez, Gerardo Hernández-Tomé, José I. Illana +1

The atmospheric neutrino flux includes a component from the prompt decay of charmed hadrons that becomes significant only at $E \geq 10$ TeV. At these energies, however, the diffuse…

hep-ph2020★ 16 cited

The $ρ$ parameter and $H^{0} \to ℓ_{i} ℓ_{j}$ in models with TeV sterile neutrinos

G. Hernández-Tomé, J. I. Illana, M. Masip

The presence of massive sterile neutrinos $N$ mixed with the active ones induces flavor violating processes in the charged lepton sector at the loop level. In particular, the ampli…

hep-ph2017★ 6 cited

Weak dipole moments of the tau lepton in models with an extended scalar sector

M. A. Arroyo-Ureña, G. Hernández-Tomé, G. Tavares-Velasco

We consider renormalizable couplings of neutral $ϕ$ , singly $ϕ^{\pm}$ , and doubly charged $ϕ^{\pm\pm}$ scalar bosons to leptons and the $Z$ gauge boson and calculate the one-loop con…

hep-ph2017★ 9 cited

G-parity breaking in $τ^{-} \to η^{(')} π^{-} ν_{τ}$ decays induced by the $η^{(')} γ γ$ form factor

G. Hernández-Tomé, G. López Castro, P. Roig

Breaking of G-parity or new weak (second class) currents can be responsible for $τ^{-} \to η^{(')} π^{-} ν_{τ}$ decays. Forthcoming measurements of $τ$ lepton properties at the Bell…

hep-ph2016★ 6 cited

$W W V$ $(V = γ, Z)$ vertex in the Georgi-Machacek model

M. A. Arroyo-Ureña, G. Hernández-Tomé, G. Tavares-Velasco

The CP-even static form factors $Δ κ_{V}^{'}$ and $Δ Q_{V}$ ( $V = γ, Z$ ) associated with the $W W V$ vertex are studied in the context of the Georgi-Machacek model (GMM), which predicts nine…

hep-ph2016★ 9 cited

Has a Higgs-flavon with a $750$ GeV mass been detected at the LHC13?

A. Bolaños, J. L. Diaz-Cruz, G. Hernández-Tomé +1

Higgs-flavon fields appear as a part of the Froggatt-Nielsen (FN) mechanism, which attempts to explain the hierarchy of Yukawa couplings. We explore the possibility that the 750 Ge…

hep-ph2013★ 6 cited

Decay $t - > c γ$ in models with SU_L(3)XU_X(1) gauge symmetry

I. Cortés-Maldonado, G. Hernández-Tomé, G. Tavares-Velasco

The one-loop level mediated $t - > c γ$ decay is analyzed in the framework of 331 models, which induce three-level flavor-changing neutral currents mediated by an extra neutral gauge…

Resonant Majorana neutrino effects in ΔL=2 four-body hyperon decays

ΔL=2 hyperon decays induced by Majorana neutrinos and doubly-charged scalars

One-loop determination of τ→π(K)ντ​[γ] branching ratios and new physics tests

Radiative corrections to τ→π(K)ντ​[γ]: a reliable new physics test

Neutrino events within muon bundles at neutrino telescopes

The ρ parameter and H0→ℓi​ℓj​ in models with TeV sterile neutrinos