Programs in Physics & Physical Chemistry
|[Licence| Download | New Version Template] adnr_v1_0.tar.gz(976 Kbytes)|
|Manuscript Title: GRAPE-Dilepton (version 1.1) a generator for dilepton production in ep collisions.|
|Authors: T. Abe|
|Program title: GRAPE-Dilepton (v1.1)|
|Catalogue identifier: ADNR_v1_0|
Distribution format: tar.gz
|Journal reference: Comput. Phys. Commun. 136(2001)126|
|Programming language: Fortran.|
|Operating system: UNIX.|
|RAM: 9M words|
|Keywords: Elementary particle physics, QCD, Dilepton, Lepton-pair, ep collision, Bethe-Heitler, Z boson, Dipole form factor, Hadron tensor, Lepton tensor, Structure function, Parton density, GRACE.|
Nature of problem:
A precise estimation of the cross-section of the electroweak dilepton production in ep collisions is required in various physics analyses, where 8~48 Feynman diagrams can contribute.
The automatic calculation system GRACE is used to obtain all of the relevant helicity amplitudes. The phase space is divided into the 3 regions according to the kinematics at the proton vertex, and the 3 different calculation methods are applied. The radiative corrections are included using the structure function and the parton shower methods.
Higgs, the proton-Z0 coupling and lepton-pair production through photon radiation from the proton are not included. The contribution from the resolved photon, i.e. Drell-Yan process in ep collisions is not included.
1 hour for a cross-section integration and 1 msec per 1 event for an event generation.
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