hitfit::Top_Fit Class Reference

Handle and fit jet permutations of an event. This is the primary interface between user's Lepjets_Event and HitFit kinematic fitting algorithm. More...

#include <Top_Fit.h>

Public Member Functions
const Top_Fit_Args &	args () const
	Return a constant reference to the fit arguments. More...
Fit_Results	fit (const Lepjets_Event &ev)
	Fit all jets permutations in ev. This function returns a Fit_Results object, which is not easy to extract information from. Users are recommended to use the class RunHitFit as interface to fit all permutations of all event. More...
double	fit_one_perm (Lepjets_Event &ev, bool &nuz, double &umwhad, double &utmass, double &mt, double &sigmt, Column_Vector &pullx, Column_Vector &pully)
	Fit for a single jet permutation. More...
	Top_Fit (const Top_Fit_Args &args, double lepw_mass, double hadw_mass, double top_mass)
	Constructor. More...

Private Attributes
const Top_Fit_Args	_args
Constrained_Top	_constrainer
double	_hadw_mass
double	_lepw_mass

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

Detailed Description

Handle and fit jet permutations of an event. This is the primary interface between user's Lepjets_Event and HitFit kinematic fitting algorithm.

Definition at line 243 of file Top_Fit.h.

Constructor & Destructor Documentation

hitfit::Top_Fit::Top_Fit	(	const Top_Fit_Args &	args,
		double	lepw_mass,
		double	hadw_mass,
		double	top_mass
	)

Constructor.

Parameters

args	The parameter settings.
lepw_mass	The mass to which the leptonic boson should be constrained to. A value of zero means this constraint will be removed.
hadw_mass	The mass to which the hadronic boson should be constrained to. A value of zero means this constraint will be removed.
top_mass	The mass to which the top quark should be constrained to. A value of zero means this constraint will be removed.

Definition at line 367 of file Top_Fit.cc.

Member Function Documentation

const Top_Fit_Args & hitfit::Top_Fit::args

(

)

const

Return a constant reference to the fit arguments.

Definition at line 608 of file Top_Fit.cc.

Fit_Results hitfit::Top_Fit::fit

(

const Lepjets_Event &

ev

)

Fit all jets permutations in ev. This function returns a Fit_Results object, which is not easy to extract information from. Users are recommended to use the class RunHitFit as interface to fit all permutations of all event.

Parameters

ev	Input: The event to fit, Output: the event after the fit.

Definition at line 498 of file Top_Fit.cc.

double hitfit::Top_Fit::fit_one_perm	(	Lepjets_Event &	ev,
		bool &	nuz,
		double &	umwhad,
		double &	utmass,
		double &	mt,
		double &	sigmt,
		Column_Vector &	pullx,
		Column_Vector &	pully
	)

Fit for a single jet permutation.

Parameters

ev	Input: The event to fit, Output: the event after the fit.
nuz	Input: A flag to indicate which neutrino solution to be used. FALSE means use solution with smaller absolute value. TRUE means use solution with larger absolute value.
umwhad	The mass of hadronic boson before the fit.
utmass	The mass of the top quarks before fitting, averaged from the values of leptonic and hadronic top quark mass.
mt	The mass of the top quark after fitting.
sigmt	The uncertainty of the mass of the top quark after fitting.
pullx	Pull quantities for well-measured variables.
pully	Pull quantities for poorly-measured variables.

Definition at line 392 of file Top_Fit.cc.

Friends And Related Function Documentation

std::ostream& operator<< ( std::ostream &  s, const Top_Fit &  fitter  )

friend

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

Parameters

s	The output stream to which to write.
fitter	The instance of Top_Fit to be printed.

Definition at line 592 of file Top_Fit.cc.

Member Data Documentation

const Top_Fit_Args hitfit::Top_Fit::_args

private

Definition at line 326 of file Top_Fit.h.

Constrained_Top hitfit::Top_Fit::_constrainer

private

Definition at line 327 of file Top_Fit.h.

double hitfit::Top_Fit::_hadw_mass

private

Definition at line 329 of file Top_Fit.h.

double hitfit::Top_Fit::_lepw_mass

private

Definition at line 328 of file Top_Fit.h.