fourvec.cc File Reference

Define three-vector and four-vector classes for the HitFit package, and supply a few additional operations. See the documentation for the header file fourvec.h for details. More...

#include "TopQuarkAnalysis/TopHitFit/interface/fourvec.h"
#include <cmath>

Go to the source code of this file.

Namespaces
	hitfit

Functions
void	hitfit::adjust_e_for_mass (Fourvec &v, double mass)
	Adjust the energy component of four-vector v (leaving the three-vector part unchanged) so that the four-vector has mass as specified in the argument. More...
void	hitfit::adjust_p_for_mass (Fourvec &v, double mass)
	Adjust the three-vector part of v, leaving the energy unchanged,. More...
double	hitfit::delta_r (const Fourvec &a, const Fourvec &b)
	Find the distance between two four-vectors in the two-dimensional space . More...
double	hitfit::deteta (const Fourvec &v, double zvert)
	NOT USED ANYMORE: Get the detector (D0-specific), requires z-vertex. More...
double	hitfit::eta_to_theta (double eta)
	Convert pseudorapidity to polar angle. More...
double	hitfit::phidiff (double phi)
	Normalized difference in azimuthal angles to a range between . More...
void	hitfit::roteta (Fourvec &v, double eta)
	Rotate four-vector v through a polar angle such that the four-vector pseudorapidity changes by a desired value. More...
void	hitfit::rottheta (Fourvec &v, double theta)
	Rotate four-vector v through a polar angle. More...
double	hitfit::theta_to_eta (double theta)
	Convert polar angle to pseudorapidity. More...

Detailed Description

Define three-vector and four-vector classes for the HitFit package, and supply a few additional operations. See the documentation for the header file fourvec.h for details.

Author

Scott Stuart Snyder snyde.nosp@m.r@bn.nosp@m.l.gov

Creation date:

Jul 2000.

Modification History:

Apr 2009: Haryo Sumowidagdo Suhar.nosp@m.yo.S.nosp@m.umowi.nosp@m.dagd.nosp@m.o@cer.nosp@m.n.ch: Imported to CMSSW.
Nov 2009: Haryo Sumowidagdo Suhar.nosp@m.yo.S.nosp@m.umowi.nosp@m.dagd.nosp@m.o@cer.nosp@m.n.ch: Added Doxygen tags for automatic generation of documentation.

Terms of Usage:

With consent from the original author (Scott Snyder).

Definition in file fourvec.cc.