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The Monte Carlo Program KoralW version 1.51 and The Concurrent Monte Carlo KoralW&YFSWW3 with All Background Graphs and First Order Corrections to W-Pair Production | | S. Jadach
; W. Placzek
; M. Skrzypek
; B.F.L. Ward
; Z. Was
; | | Date: |
4 Apr 2001 | | Journal: | Comput.Phys.Commun. 140 (2001) 475-512 | | Subject: | hep-ph | | Abstract: | The version 1.51 of the Monte Carlo (MC) program KoralW for all $e^+e^- o f_1ar f_2 f_3ar f_4$ processes is presented. The most important change since the previous version 1.42 is the facility for writing MC events on the mass storage device and re-processing them later on. In the re-processing one may modify parameters of the Standard Model in order to fit them to experimental data. Another important new feature is a possibility of including complete ${cal O}(alpha)$ corrections to double-resonant W-pair component-processes in addition to all background (non-WW) graphs. The inclusion is done with the help of the YFSWW3 MC event generator for fully exclusive differential distributions (event-per-event). Technically, it is done in such a way that YFSWW3 runs concurrently with KoralW as a separate slave process, reading momenta of the MC event generated by KoralW and returning the correction weight to KoralW. KoralW introduces the ${cal O}(alpha)$ correction using this weight, and finishes processing the event (rejection due to total MC weight, hadronization, etc.). The communication between KoralW and YFSWW3 is done with the help of the FIFO facility of the UNIX/Linux operating system. This does not require any modifications of the FORTRAN source codes. The resulting Concurrent MC event generator KoralW&YFSWW3 looks from the user’s point of view as a regular single MC event generator with all the standard features. | | Source: | arXiv, hep-ph/0104049 | | Services: | Forum | Review | PDF | Favorites | |
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