4 papers · 1 filter
Probe of CP Violation in e+e- -> ttbar Near Threshold
Y. Sumino
We report our theoretical study on how to probe the anomalous CP-violating couplings of the top quark in the ttbar region at future e+e- linear colliders. We focus on the unique ro…
Gauge dependence and matching procedure of a nonrelativistic QCD boundstate formalism
Y. Sumino
We investigate gauge dependence of a nonrelativistic boundstate formalism used in contemporary calculations. It is known that the effective Hamiltonian of the boundstate system dep…
Renormalon Cancellation in Heavy Quarkonia and Determination of m_b, m_t
Y. Sumino
This is an elementary introduction to the recent significant theoretical progress in the field of heavy quarkonium physics. We show how renormalon cancellation takes place in the h…
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…