Do a constrained kinematic fitting for a $Z\to\ell^{+}\ell^{-} + \rm{jets}$ event. More...

#include <Constrained_Z.h>

Public Member Functions
double	constrain (Lepjets_Event &ev, Column_Vector &pull)
	Do a constrained fit of $Z\to\ell^{+}\ell^{-} + \rm{jets}$ event. Returns the pull quantities in pull. Returns the $\chi^{2}$ , 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 $Z\to\ell^{+}\ell^{-} + \rm{jets}$ event.

Definition at line 111 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 91 of file Constrained_Z.cc.

References _args, _constrainer, hitfit::Fourvec_Constrainer::add_constraint(), hitfit::lepton_label, 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 $Z\to\ell^{+}\ell^{-} + \rm{jets}$ event. Returns the pull quantities in pull. Returns the $\chi^{2}$ , 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 $\chi^{2}$ of the fit. Return a negative value if the fit didn't converge.

Definition at line 226 of file Constrained_Z.cc.

References _constrainer, hitfit::Fourvec_Constrainer::constrain(), and 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 262 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 $\chi^{2}$ constrainer.

Definition at line 157 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 163 of file Constrained_Z.h.

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

Public Member Functions

Private Attributes

Friends

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Friends And Related Function Documentation

Member Data Documentation