Multi-parton cross sections at hadron colliders
We present an alternative method to calculate cross sections for multi-parton scattering processes in the standard model at leading order. The helicity amplitudes are computed using recursion relations in the number of particles, based on the Dyson–Schwinger equations, whereas the summation over col...
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| Veröffentlicht in: | The European physical journal. C, Particles and fields Particles and fields, 2007-05, Vol.50 (4), p.843-856 |
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| container_title | The European physical journal. C, Particles and fields |
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| creator | Papadopoulos, C.G. Worek, M. |
| description | We present an alternative method to calculate cross sections for multi-parton scattering processes in the standard model at leading order. The helicity amplitudes are computed using recursion relations in the number of particles, based on the Dyson–Schwinger equations, whereas the summation over colour and helicity configurations is performed by Monte Carlo methods. The computational cost of our algorithm grows asymptotically as 3n, where n is the number of particles involved in the process, as opposed to the n!-growth of the Feynman diagram approach. Typical results for the total cross section, the differential distributions of the invariant masses and the transverse momenta of the partons are presented and cross checked by explicit summation over colours. |
| doi_str_mv | 10.1140/epjc/s10052-007-0246-2 |
| format | Article |
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| ispartof | The European physical journal. C, Particles and fields, 2007-05, Vol.50 (4), p.843-856 |
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| language | eng |
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| subjects | Algorithms Asymptotic methods Computer simulation Configuration management Cross-sections Feynman diagrams Helicity Monte Carlo simulation Partons |
| title | Multi-parton cross sections at hadron colliders |
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