31 citations · 85 across the 6 of their papers we have counts for
6 papers · 1 filter
Top quark pair production near the threshold in e+e- collisions
Takaaki Nagano
It was reported that the NNLO correction to the total cross section near the ttbar threshold in e+e- collisions is as large as the NLO correction to it. In the thesis, we improve t…
Probe of CP Violation in e+e- -> ttbar Near Threshold
M. Jezabek, T. Nagano, Y. Sumino
We study how to probe the anomalous CP-violating couplings of top quark with photon, Z and gluon in the ttbar threshold region at future e+e- colliders. These couplings contribute…
Top-Antitop Pair Production close to Threshold: Synopsis of recent NNLO Results
A. H. Hoang, M. Beneke, K. Melnikov +10
Using non-relativistic effective theories, new next-to-next-to-leading order (NNLO) QCD corrections to the total production cross section at the Linear Collider have been…
O(alpha_s^2) Corrections to e+e- to ttbar Total and Differential Cross Sections Near Threshold
T. Nagano, A. Ota, Y. Sumino
Recently full O(alpha_s^2, alpha_s*beta, beta^2) corrections to the threshold total cross section for e+e- to ttbar have been calculated, and the reported corrections turned out to…
Probing the sgeneration spectrum in chargino decays
Ken-ichi Hikasa, Takaaki Nagano
Some mechanisms of supersymmetry breaking result in splitting of the third generation sfermions from the other sfermions. We show that the three-body decay branching ratio of the l…
Late-Time Entropy Production and Relic Abundances of Neutralinos
Takaaki Nagano, Masahiro Yamaguchi
Many models possess unwanted relics, which should be diluted by entropy production just before the big-bang nucleosynthesis. A field responsible for the entropy production may prod…