hitfit::Constrained_Z Class Reference

Do a constrained kinematic fitting for a event. More...

#include <Constrained_Z.h>

Public Member Functions
double	constrain (Lepjets_Event &ev, Column_Vector &pull)
	Do a constrained fit of event. Returns the pull quantities in pull. Returns the , this will be negative if the fit failed to converge. More...
	Constrained_Z (const Constrained_Z_Args &args)
	Constructor, create an instance of the Constrained_Z object from the argument object. More...

Private Attributes
const Constrained_Z_Args &	_args
Fourvec_Constrainer	_constrainer

Friends
std::ostream &	operator<< (std::ostream &s, const Constrained_Z &cz)
	Output stream operator, print the content of this Constrained_Z to an output stream. More...

Detailed Description

Do a constrained kinematic fitting for a event.

Definition at line 110 of file Constrained_Z.h.

Constructor & Destructor Documentation

hitfit::Constrained_Z::Constrained_Z

(

const Constrained_Z_Args &

args

)

Constructor, create an instance of the Constrained_Z object from the argument object.

Parameters

args	Argument for this instance of Constrained_Z object.

Definition at line 90 of file Constrained_Z.cc.

References _args, _constrainer, hitfit::Fourvec_Event::add(), hitfit::Fourvec_Constrainer::add_constraint(), hitfit::Lepjets_Event_Lep::eta_sigma(), ev, hitfit::Resolution::inverse(), hitfit::isr_label, hitfit::Lepjets_Event::jet(), gen::k, hitfit::Lepjets_Event::kt(), hitfit::Lepjets_Event::kt_res(), hitfit::Lepjets_Event::lep(), hitfit::lepton_label, ResonanceBuilder::mass, hitfit::Lepjets_Event::met(), hitfit::Lepjets_Event::njets(), hitfit::Lepjets_Event::nleps(), MuonAssociatorByHits_cfi::obj, hitfit::Fourvec_Event::obj(), hitfit::Lepjets_Event_Lep::p(), hitfit::FE_Obj::p, hitfit::Vector_Resolution::p_res(), hitfit::Lepjets_Event_Lep::p_sigma(), hitfit::Lepjets_Event_Lep::phi_sigma(), hitfit::Lepjets_Event_Lep::res(), hitfit::Fourvec_Event::set_kt_error(), hitfit::Fourvec_Event::set_x_p(), hitfit::Resolution::sigma(), and hitfit::Constrained_Z_Args::zmass().

  : _args (args),
    _constrainer (args.fourvec_constrainer_args())
{
  char buf[256];
  sprintf (buf, "(%d) = %f", lepton_label, _args.zmass());
  _constrainer.add_constraint (buf);
}

Member Function Documentation

double hitfit::Constrained_Z::constrain	(	Lepjets_Event &	ev,
		Column_Vector &	pull
	)

Do a constrained fit of event. Returns the pull quantities in pull. Returns the , this will be negative if the fit failed to converge.

Parameters

ev	The event to be fitted (input), and the event after fitting (output).
pull	Pull quantities for the well-measured variables.

Input:

• Lepjets_Event ev.

Output:

• Lepjets_Event ev.
• Column_Vector pull.

Return:

The of the fit. Return a negative value if the fit didn't converge.

Definition at line 225 of file Constrained_Z.cc.

References _constrainer, hitfit::Fourvec_Constrainer::constrain(), and funct::m.

{
  Fourvec_Event fe;
  do_import (ev, fe);
  Column_Vector pully;
  double m, sigm;
  double chisq = _constrainer.constrain (fe, m, sigm, pull, pully);
  do_export (fe, ev);

  return chisq;
}

Friends And Related Function Documentation

std::ostream& operator<< ( std::ostream &  s, const Constrained_Z &  cz  )

friend

Output stream operator, print the content of this Constrained_Z to an output stream.

Parameters

s	The output stream to which to wrire.
cz	The instance of Constrained_Z to be printed.

Definition at line 261 of file Constrained_Z.cc.

{
  return s << cz._constrainer;
}

Member Data Documentation

const Constrained_Z_Args& hitfit::Constrained_Z::_args

private

Parameter settings for the constrainer.

Definition at line 156 of file Constrained_Z.h.

Referenced by Vispa.Main.Application.Application::_readCommandLineAttributes(), and Constrained_Z().

Fourvec_Constrainer hitfit::Constrained_Z::_constrainer

private

The guy that actually does the work.

Definition at line 162 of file Constrained_Z.h.

Referenced by constrain(), Constrained_Z(), and hitfit::operator<<().