Multi-parton loop amplitudes and next-to-leading order jet cross-sections
- Univ. of California, Los Angeles, CA (US). Dept. of Physics
- Stanford Univ., CA (US). Stanford Linear Accelerator Center
- Service de Physique Theorique, Gif-sur-Yvette (France). Centre d'Etudes de Saclay
- CERN, Geneva (Switzerland). Theory Div.
The authors review recent developments in the calculation of QCD loop amplitudes with several external legs, and their application to next-to-leading order jet production cross-sections. When a number of calculational tools are combined together--helicity, color and supersymmetry decompositions, plus unitarity and factorization properties--it becomes possible to compute multi-parton one-loop QCD amplitudes without ever evaluating analytically standard one-loop Feynman diagrams. One-loop helicity amplitudes are now available for processes with five external partons (ggggg, q{anti q}ggg and q{anti q}q {anti q}{prime} g), and for an intermediate vector boson V {equivalent_to} {gamma}{sup *}, Z, W plus four external partons (V q{anti q} and V q{anti q}q{prime}{anti q}{prime}). Using these amplitudes, numerical programs have been constructed for the next-to-leading order corrections to the processes p{anti p} {yields} 3 jets (ignoring quark contributions so far) and e{sup +}e{sup -} {yields} 4 jets.
- Research Organization:
- Stanford Univ., Stanford Linear Accelerator Center, CA (US); Univ. of California, Dept of Physics, Los Angeles, CA (US)
- Sponsoring Organization:
- USDOE Office of Energy Research, Washington, DC (US); CEA, 75 - Paris (France); Swiss National Science Foundation, Bern (Switzerland); North Atlantic Treaty Organization, Brussels (Belgium) (US)
- DOE Contract Number:
- AC03-76SF00515; FG03-91ER40662
- OSTI ID:
- 666073
- Report Number(s):
- SLAC-PUB-7749; CERN-TH-98-39; UCLA-98/TEP/2; CONF-9710149-; ON: DE98059194; CNN: Grant NATO CRG-921322; TRN: US200306%%113
- Resource Relation:
- Conference: International symposium on QCD corrections and new physics, Hiroshima (JP), 10/27/1997--10/29/1997; Other Information: Supercedes report DE98059194; PBD: Feb 1998; PBD: 1 Feb 1998
- Country of Publication:
- United States
- Language:
- English
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