Work

HELAS and MadGraph/MadEvent with spin-2 particles

Year: 2008

Type: article

Abstract: 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, are added to the HELAS ( HEL icity A mplitude S ubroutines) library. They are coded in such a way that arbitrary scattering amplitudes with one graviton production and its decays can be generated automatically by MadGraph and MadEvent , after slight modifications. All the codes have been tested carefully by making use of the invariance of the helicity amplitudes under the gauge and general coordinate transformations.

Source: The European Physical Journal C

DOI: 10.1140/epjc/s10052-008-0663-x

Authors: K. Hagiwara, J. Kanzaki, Q. Li, K. Mawatari

Institutions: High Energy Accelerator Research Organization, Karlsruhe Institute of Technology, Korea Institute for Advanced Study

Language: English

Topic: Particle physics theoretical and experimental studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid:

Funders: Deutsche Forschungsgemeinschaft, Ministry of Education, Culture, Sports, Science and Technology, Japan Society for the Promotion of Science