What is the Method?

The Phox programs are FORTRAN codes combining analytical and Monte-Carlo approaches, and proceed like a `partonic even generator'. In an intermediate step of the calculation of higher order corrections to inclusive observables, soft and collinear singularities appear at the partonic level, separately in virtual corrections to 2 -> 2 processes, and in real 2 -> 3 processes. The singularities in real 2 -> 3 contributions are treated according to a method combining phase space slicing and subtraction. Then the regularized cross section is used to generate partonic configurations. These configurations are finally projected on histograms to obtain the desired observables - whose values have to be independent of the slicing used. For more details on the method, see:

A more detailed description can be found in the paper Eur.Phys.J. C 16, 311 (2000) [hep-ph/9911340]

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