ThePEG::HEPEUP Class Reference

The HEPEUP class is a simple container corresponding to the Les Houches accord (hep-ph/0109068) common block with the same name. More...

#include <LesHouches.h>

Public Member Functions
void	resize (int nup)
	Set the NUP variable, corresponding to the number of particles in the current event, to nup, and resize all relevant vectors accordingly.
void	resize ()
	Assuming the NUP variable, corresponding to the number of particles in the current event, is correctly set, resize the relevant vectors accordingly.
Standard constructors and destructors.
	HEPEUP ()
	Default constructor.

Public Attributes
int	NUP
	The number of particle entries in the current event.
int	IDPRUP
	The subprocess code for this event (as given in LPRUP).
double	XWGTUP
	The weight for this event.
pair< double, double >	XPDWUP
	The PDF weights for the two incoming partons. More...
double	SCALUP
	The scale in GeV used in the calculation of the PDF's in this event.
double	AQEDUP
	The value of the QED coupling used in this event.
double	AQCDUP
	The value of the QCD coupling used in this event.
vector< long >	IDUP
	The PDG id's for the particle entries in this event.
vector< int >	ISTUP
	The status codes for the particle entries in this event.
vector< pair< int, int > >	MOTHUP
	Indices for the first and last mother for the particle entries in this event.
vector< pair< int, int > >	ICOLUP
	The colour-line indices (first(second) is (anti)colour) for the particle entries in this event.
vector< array< double, 5 > >	PUP
	Lab frame momentum (Px, Py, Pz, E and M in GeV) for the particle entries in this event.
vector< double >	VTIMUP
	Invariant lifetime (c*tau, distance from production to decay im mm) for the particle entries in this event.
vector< double >	SPINUP
	Spin info for the particle entries in this event given as the cosine of the angle between the spin vector of a particle and the 3-momentum of the decaying particle, specified in the lab frame.

Detailed Description

The HEPEUP class is a simple container corresponding to the Les Houches accord (hep-ph/0109068) common block with the same name.

The members are named in the same way as in the common block. However, fortran arrays are represented by vectors, except for the arrays of length two which are represented by pair objects.

Definition at line 128 of file LesHouches.h.

Member Data Documentation

XPDWUP

pair<double,double> ThePEG::HEPEUP::XPDWUP

The PDF weights for the two incoming partons.

Note that this variable is not present in the current LesHouches accord (hep-ph/0109068), hopefully it will be present in a future accord.

Definition at line 190 of file LesHouches.h.

---

The documentation for this class was generated from the following file:

• LesHouches.h