Reweighting of Excalibur Events for 4 Fermion Physics at Lep200
نویسندگان
چکیده
The use of a reweighting technique of Montecarlo events can help in the reduction of the simulated statistics needed in 4 fermion physics studies at LEP200. A routine for the reweighting of events generated with the DELPHI customized version of the EXCALIBUR 4 fermion code is presented. Some examples of application for the W mass measurement are discussed.
منابع مشابه
Initial-state QED corrections to four-fermion production in e+e− collisions at LEP200 and beyond
The implementation of QED initial-state radiative corrections in the process of four-fermion production at LEP200 and higher-energy e+e− colliders is discussed. Because of the presence of charged-current processes, this is a nontrivial problem, and we compare our approach with other existing treatments. We describe the Monte Carlo algorithm used for the generation of 4fermion events with photon...
متن کاملRapidity Gap in Jet Events at LEP 200
We analyze various perturbative mechanisms for the production of jet events containing rapidity gaps in e + e − annihilation at LEP200 energies. We found that the processes e + e − → γ * γ * , γ * Z, ZZ, W W → 4 jets generate gap events at an observable rate. We point out that LEP200 offers a unique opportunity for the study of gap events due to a smaller background of " fake-gaps " .
متن کاملEvent reweighting to account for DPA
This note reports about the way it is possible to reweight four-fermion (4-f) events in order to account for the O(α) radiative corrections implemented in double pole approximation (DPA). The recommended choice for the DELPHI users is described and commented. This work is based on the new codes implementing DPA developed in the frame of the 2000 LEP2 Montecarlo workshop.
متن کاملEXCALIBUR – a Monte Carlo program to evaluate all four fermion processes at LEP 200 and beyond 1
A Monte Carlo program is presented that computes all four fermion processes in e + e − annihilation. QED initial state corrections and QCD contributions are included. Fermions are taken to be massless, allowing a very fast evaluation of the matrix element. A systematic, modular and self-optimizing strategy has been adopted for the Monte Carlo integration, that serves also as an example for furt...
متن کاملTight- binding study of electronic band structure of anisotropic honeycomb lattice
The two-dimensional structure of graphene, consisting of an isotropic hexagonal lattice of carbon atoms, shows fascinating electronic properties, such as a gapless energy band and Dirac fermion behavior of electrons at fermi surface. Anisotropy can be induced in this structure by electrochemical pressure. In this article, by using tight-binding method, we review anisotropy effects in the elect...
متن کامل