PYTHIA  8.303
Public Member Functions | List of all members
Thrust Class Reference

#include <Analysis.h>

Public Member Functions

 Thrust (int selectIn=2)
 Constructor.
 
bool analyze (const Event &event)
 Analyze event. More...
 
double thrust () const
 Return info on results of analysis.
 
double tMajor () const
 
double tMinor () const
 
double oblateness () const
 
Vec4 eventAxis (int i) const
 
void list () const
 Provide a listing of the info. More...
 
int nError () const
 Tell how many events could not be analyzed.
 

Detailed Description

Thrust class. This class performs thrust analysis on an event.

Member Function Documentation

bool analyze ( const Event event)

Analyze event.

Initial values and counters zero.

Loop over desired particles in the event.

Store momenta. Use energy component for absolute momentum.

Very low multiplicities (0 or 1) not considered.

Try all combinations of reference vector orthogonal to two particles.

Add all momenta with sign; two choices for each reference particle.

Maximum gives thrust axis and value.

Subtract momentum along thrust axis.

Simpleminded major and minor axes if too little transverse left.

Try all reference vectors orthogonal to one particles.

Add all momenta with sign; two choices for each reference particle.

Maximum gives major axis and value.

Orthogonal direction gives minor axis, and from there value.

Done.

void list ( ) const

Provide a listing of the info.

Header.

The thrust, major and minor values and related event axes.

Listing finished.


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