fastjet::BackgroundJetScalarPtDensity Class Reference

Class that implements (scalar pt sum of jet)/(scalar area of jet) for background estimation. More...

#include <BackgroundEstimator.hh>

Inheritance diagram for fastjet::BackgroundJetScalarPtDensity:

Collaboration diagram for fastjet::BackgroundJetScalarPtDensity:

List of all members.

Public Member Functions
	BackgroundJetScalarPtDensity ()
	Default constructor provides background estimation with scalar pt sum.
	BackgroundJetScalarPtDensity (double n)
	Constructor to provide background estimation based on .
virtual double	result (const PseudoJet &jet) const
	the action of the function this _has_ to be overloaded in derived classes
virtual std::string	description () const
	returns a description of the function (an empty string by default)

---

Detailed Description

Class that implements (scalar pt sum of jet)/(scalar area of jet) for background estimation.

Optionally it can return a quantity based on the sum of pt^n, e.g. for use in subtracting fragementation function moments.

Definition at line 81 of file BackgroundEstimator.hh.

---

Member Function Documentation

double fastjet::BackgroundJetScalarPtDensity::result

(

const PseudoJet &

pj

)

const [virtual]

the action of the function this _has_ to be overloaded in derived classes

Parameters:

pj	the PseudoJet input to the function

Implements fastjet::FunctionOfPseudoJet< double >.

Definition at line 61 of file BackgroundEstimator.cc.

References fastjet::PseudoJet::area(), and fastjet::PseudoJet::constituents().

                                                                       {
  std::vector<PseudoJet> constituents = jet.constituents();
  double scalar_pt = 0;
  for (unsigned i = 0; i < constituents.size(); i++) {
    scalar_pt += pow(constituents[i].perp(), _pt_power);
  }
  return scalar_pt / jet.area();
}

---

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

• tools/fastjet/tools/BackgroundEstimator.hh
• tools/BackgroundEstimator.cc