Y. Umeda

activity

20002005

collaborators

4 papers

hep-ph2005

The matter effects to neutrino oscillations ν_μ\to ν_e, ν_μat very long baselines and the neutrino mixing angles θ_13 and θ_23

Guey-Lin Lin, Yoshiaki Umeda

We study the matter effects to neutrino oscillations ν_μ\to ν_e and ν_μ\to ν_μat very long baselines. It has been observed that, for a very long baseline L~10000 km, the resonance…

hep-ph2004

SUSY Loop Contributions to the $W$ -Pair Production in $e^{+} e^{-}$ Collisions

Kaoru Hagiwara, Shinya Kanemura, Yoshiaki Umeda

We discuss one-loop contributions of supersymmetry (SUSY) particles to the process $e^{+} e^{-} \to W^{+} W^{-}$ in the minimal supersymmetric standard model. The calculation is tested by us…

hep-ph2004

One-loop contributions of charginos and neutralinos to W+ W- production in e+ e- collisions

Kaoru Hagiwara, Shinya Kanemura, Yoshiaki Umeda

We study one-loop effects of charginos and neutralinos on the helicity amplitudes for the process $e^{+} e^{-} \to W^{+} W^{-}$ in the MSSM. The calculation is tested by using two methods. Fi…

hep-ph2000

One-loop contributions of the super-partner particles to $e^{-} e^{+} \to W^{-} W^{+}$ in the MSSM

Kaoru Hagiwara, Shinya Kanemura, Yoshiaki Umeda

One-loop contributions of super-partner particles to $W$ -pair production at $e^{+} e^{-}$ collision are discussed in the MSSM. To obtain trustworthy results we test our calculation usin…

The matter effects to neutrino oscillations ν_μ\to ν_e, ν_μat very long baselines and the neutrino mixing angles θ_13 and θ_23

SUSY Loop Contributions to the W-Pair Production in e+e− Collisions

One-loop contributions of charginos and neutralinos to W+ W- production in e+ e- collisions

One-loop contributions of the super-partner particles to e−e+→W−W+ in the MSSM

SUSY Loop Contributions to the $W$ -Pair Production in $e^{+} e^{-}$ Collisions

One-loop contributions of the super-partner particles to $e^{-} e^{+} \to W^{-} W^{+}$ in the MSSM