D. Guetta

activity

19962026

most citedGRB 090423 at a redshift of z~8.1

498 citations · 5.4k across the 113 of their papers we have counts for

collaborators

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9 papers · 1 filter

hep-ph2000★ 6 cited

Determination of the strong g-coupling and of the $μ_{B^{*} B γ} -$ strength from two-photon decays of heavy vector mesons

Dafne Guetta, Paul Singer

We describe a calculation of the two-photon decays of heavy vector-mesons, $B^{*} \to B γ γ$ and $D^{*} \to D γ γ$ , by using the ``heavy meson chiral Lagrangian''. The decay amplitudes are e…

hep-ph2000★ 9 cited

$ω - ρ$ Mixing and the $ω \to π π γ$ Decay

Dafne Guetta, Paul Singer

We reexamine the $ω \to π^{0} π^{0} γ$ decay, adding the effect of $ω - ρ$ mixing to the amplitude calculated with the aid of chiral perturbation theory and vector meson dominance. We…

hep-ph1999

Study of the anomalous couplings at NLC with polarized beams

R. Casalbuoni, S. De Curtis, D. Guetta

The present contribution reports a study of the effects of anomalous gauge and fermionic couplings in the process $e^{+} e^{-} - > W^{+} W^{-}$ at the Next Linear Collider focusing in particu…

hep-ph1999★ 11 cited

Two photon decays of heavy vector mesons, $B^{} \to B γ γ$ , $D^{} \to D γ γ$ , and the possible determination of the $g_{B^{} (D^{}) B (D) π}$ and $g_{B^{*}^0B^0γ}$ couplings

Dafne Guetta, Paul Singer

We study the novel decays $B^{*} \to B γ γ$ and $D^{*} \to D γ γ$ using the framework of the Heavy Meson Chiral Lagrangian (HM $χ$ L) to leading order in chiral perturbation theory. The br…

hep-ph1998★ 9 cited

$B \to τ μ (X)$ decays in SUSY models without R-parity

Dafne Guetta, Jesus M. Mira, Enrico Nardi

Being strictly forbidden in the standard model, experimental detection of the lepton flavor violating decays $B (B ˉ) \to τ^{+} μ^{-}$ and $b (b ˉ) \to X τ^{+} μ^{-}$ would constitute an unm…

hep-ph1998★ 29 cited

Effects of R-parity Violating Couplings on CP Asymmetries in Neutral B Decays

Dafne Guetta

A detailed analysis of the effects of supersymmetric models without R-parity on various CP asymmetries in neutral $B$ decays is given. We concentrate on models with Abelian horizon…

Determination of the strong g-coupling and of the μB∗Bγ​− strength from two-photon decays of heavy vector mesons

ω−ρ Mixing and the ω→ππγ Decay

Study of the anomalous couplings at NLC with polarized beams

Two photon decays of heavy vector mesons, B∗→Bγγ,D∗→Dγγ, and the possible determination of the gB∗(D∗)B(D)π​ and $g_{B^{*}^0B^0γ}$ couplings

B→τμ(X) decays in SUSY models without R-parity

Effects of R-parity Violating Couplings on CP Asymmetries in Neutral B Decays

Determination of the strong g-coupling and of the $μ_{B^{*} B γ} -$ strength from two-photon decays of heavy vector mesons

$ω - ρ$ Mixing and the $ω \to π π γ$ Decay

Two photon decays of heavy vector mesons, $B^{} \to B γ γ$ , $D^{} \to D γ γ$ , and the possible determination of the $g_{B^{} (D^{}) B (D) π}$ and $g_{B^{*}^0B^0γ}$ couplings

$B \to τ μ (X)$ decays in SUSY models without R-parity