VinciaConstants Namespace Reference

Maths headers. More...

Variables
const double	UNITY = 1.0
const double	DECI = 1.0e-1
const double	CENTI = 1.0e-2
const double	MILLI = 1.0e-3
const double	MICRO = 1.0e-6
const double	NANO = 1.0e-9
const double	PICO = 1.0e-12
const double	CA = 3.0
	Colour factors in Vincia normalization.
const double	CF = 8.0/3.0
const double	TR = 1.0
const double	NC = 3.0
const double	gammaE = 0.577215664901532860606512090082402431042
	Mathematical constants (Euler–Mascheroni constant).
const int	DEBUG = 4
	Verbosity levels. Vincia has one more level (debug) beyond report.
const int	DASHLEN = 80
	Padding length for dashes in standardised Vincia verbose output.

Detailed Description

Maths headers.

VinciaCommon.h is a part of the PYTHIA event generator. Copyright (C) 2024 Peter Skands, Torbjorn Sjostrand. PYTHIA is licenced under the GNU GPL v2 or later, see COPYING for details. Please respect the MCnet Guidelines, see GUIDELINES for details. This file contains global constants for the Vincia antenna shower as well as various auxiliary classes used by the Vincia shower model.Include Pythia 8 headers. Global Vincia constants, defined to live in a Vincia-specific namespace to avoid potential clashes with anything else defined in Pythia8.

Variable Documentation

const double UNITY = 1.0

Global numerical precision targets (should be kept within a reasonable margin of machine precision). Large values may result in strange results due to non-zero terms being artificially forced to zero.