275 citations · 765 across the 19 of their papers we have counts for
12 papers · 1 filter
HELAS and MadGraph/MadEvent with spin-2 particles
Kaoru Hagiwara, Junichi Kanzaki, Qiang Li +1
Fortran subroutines to calculate helicity amplitudes with massive spin-2 particles (massive gravitons), which couple to the standard model particles via the energy momentum tensor,…
Constraints on the electroweak chiral Lagrangian from the precision data
Sukanta Dutta, Kaoru Hagiwara, Qi-Shu Yan +1
In the framework of the effective field theory method, we use the experimental data and the perturbative unitarity bounds to determine the values and uncertainty of all the 11 chir…
Spin Analysis of Supersymmetric Particles
S. Y. Choi, K. Hagiwara, H. -U. Martyn +2
The spin of supersymmetric particles can be determined at colliders unambiguously. This is demonstrated for a characteristic set of non-colored supersymmetric particles --…
Polarization in SUSY Cascade Decays
S. Y. Choi, K. Hagiwara, Y. G. Kim +2
leptons emitted in cascade decays of supersymmetric particles are polarized. The polarization may be exploited to determine spin and mixing properties of the neutralinos and st…
SUSY Loop Contributions to the -Pair Production in Collisions
Kaoru Hagiwara, Shinya Kanemura, Yoshiaki Umeda
We discuss one-loop contributions of supersymmetry (SUSY) particles to the process in the minimal supersymmetric standard model. The calculation is tested by us…
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 in the MSSM. The calculation is tested by using two methods. Fi…