Monte Carlo Program KoralW 1.42 for All Four-Fermion Final States in e+e- Collisions

TL;DR

KoralW 1.42 is a Monte Carlo simulation tool that accurately generates all four-fermion final states in electron-positron collisions, incorporating multiphoton bremsstrahlung, anomalous couplings, and decay processes.

Contribution

The paper introduces KoralW 1.42, a comprehensive Monte Carlo program that covers all four-fermion final states with advanced sampling, matrix elements, and additional physics effects.

Findings

Generates all four-fermion final states in e+e- collisions.

Includes multiphoton bremsstrahlung with YFS formulation.

Provides tools for differential and total cross-section calculations.

Abstract

The Monte Carlo program KoralW version 1.42 is presented. It generates all four-fermion final states with multibranch dedicated Monte Carlo pre-samplers and complete, massive, Born matrix elements. The presamplers cover the entire phase space. Multiphoton bremsstrahlung is implemented in the ISR approximation within the YFS formulation with the O(alpha**3) leading-log matrix element. The anomalous WWV couplings are implemented in CC03 approximation. The standard decay libraries (JETSET, PHOTOS, TAUOLA) are interfaced. The semi-analytical CC03-type code KorWan for differential and total cross-sections is included.