Last of the finite loop amplitudes in QCD
Journal Article
·
· Physical Review. D, Particles Fields
- Department of Physics and Astronomy, UCLA, Los Angeles, California 90095-1547 (United States)
We use on-shell recursion relations to determine the one-loop QCD scattering amplitudes with a massless external quark pair and an arbitrary number (n-2) of positive-helicity gluons. These amplitudes are the last of the unknown infrared- and ultraviolet-finite loop amplitudes of QCD. The recursion relations are similar to ones applied at tree level, but contain new nontrivial features corresponding to poles present for complex momentum arguments but absent for real momenta. We present the relations and the compact solutions to them, valid for all n. We also present compact forms for the previously computed one-loop n-gluon amplitudes with a single negative helicity and the rest positive helicity.
- OSTI ID:
- 20774545
- Journal Information:
- Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 12 Vol. 72; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
Similar Records
The Last of the Finite Loop Amplitudes in QCD
On-shell recurrence relations for one-loop QCD amplitudes
On-Shell Recurrence Relations for One-Loop QCD Amplitudes
Journal Article
·
Mon May 30 20:00:00 EDT 2005
· Phys.Rev.D72:125003,2005
·
OSTI ID:890814
On-shell recurrence relations for one-loop QCD amplitudes
Journal Article
·
Sun May 15 00:00:00 EDT 2005
· Physical Review. D, Particles Fields
·
OSTI ID:20709315
On-Shell Recurrence Relations for One-Loop QCD Amplitudes
Technical Report
·
Sun Jan 30 19:00:00 EST 2005
·
OSTI ID:839761