Speaker
Dr
Yoshimasa KURIHARA
(KEK)
Description
Automatic Feynman-amplitude calculation system, GRACE, has been extended to treat next-to-leading order (NLO) QCD calculations. Matrix elements of loop diagrams as well as those of tree level ones can be generated using the GRACE system. A soft/collinear singularity is treated using a leading-log subtraction method.
Higher order re-summation of the soft/collinear correction by the parton shower method is combined with the NLO matrix-element without any double-counting in this method. Event-generators created using a GRACE system are implemented in the GR@PPA, which is an event-generator framework for high energy hadron-collision interactions.
Author
Dr
Yoshimasa KURIHARA
(KEK)
