Monte Carlo simulation of two-photon processes: III: Complete lowest order calculations for e+e−→e+e−μ+μ− with large angle tagging conditions
✍ Scribed by F.A Berends; P.H Daverveldt; R Kleiss
- Publisher
- Elsevier Science
- Year
- 1986
- Tongue
- English
- Weight
- 979 KB
- Volume
- 40
- Category
- Article
- ISSN
- 0010-4655
No coin nor oath required. For personal study only.
✦ Synopsis
Title of program: DIAG12NST
angle of one of the beam particles. Consequently the efficiency of the program is approximately equal to that of the no-tagging Catalogue number: AAFJ Monte Carlo program which was discussed in ref. [1].
Program obtainable from: CPC Program Library, Queen's Uni-Method of solution versity of Belfast, N. Ireland (see application form in this Issue)
The method applied resembles closely the one described in ref.
Computer: Amdahl V7B or IBM 370/158 [1]. Again the events are generated by the use of four subgenerators. The subgenerators for the multiperipheral and brems-
Program language: FORTRAN H~EXT* strahlung Feynman diagrams are now changed in such a way that the produced events directly fulfil a cut on the scattering High speed storage required.' 256 K angle of the positron beam. The subgenerators for the conversion and annihilation group have not been changed because No. of bits in a word: 32 the dominant part of the cross Section corresponds to events which lie completely in the central dectector, so that only little Peripheral used: line printer efficiency will be lost by throwing away those events where the scattered positron angle does not satisfy the cut.
No. of lines in combined program and test deck: 3073
Restrictions Keywords: two-photon process, Monte Carlo simulation, event
In the program the positron beam is chosen to be scattered generator, e~e collision, large angle tagging, quantum elec-over a large angle. The scattering angle of the electron beam trodynamics, electron, positron, muon can only be restricted by an upper bound. The program runs most efficiently with an anti-tag cut on the electron: i.e. the Nature of the physical problem maximum scattering angle of the electron is smaller than the Single tagging conditions have to be applied to two-photon minimum scattering angle of the positron beam. Consequently processes when one wants to measure the four-momentum of the program is not well suited to simulate double-tagging one of the virtual photons in the 'multiperipheral' Feynman experiments.