The Physics Vectors classes.

Several documents describing these classes are listed below:

The main histogram class is documented in class TGeoManager.
The Chapter about the Physics Vectors classes in the Users Guide

The Physics Vector package consists of five classes:

It is a combination of CLHEPs Vector package written by Leif Lonnblad, Andreas Nilsson and Evgueni Tcherniaev and a ROOT package written by Pasha Murat. for CLHEP see: http://www.cern.ch/clhep/

Classes
class	TFeldmanCousins
	Class to calculate the CL upper limit using the Feldman-Cousins method as described in PRD V57 #7, p3873-3889. More...

class	TGenPhaseSpace
	Utility class to generate n-body event, with constant cross-section (default) or with Fermi energy dependence (opt="Fermi"). More...

class	TLorentzRotation
	The TLorentzRotation class describes Lorentz transformations including Lorentz boosts and rotations (see TRotation) More...

class	TLorentzVector

class	TQuaternion
	Quaternion is a 4-component mathematic object quite convenient when dealing with space rotation (or reference frame transformation). More...

class	TRobustEstimator
	Minimum Covariance Determinant Estimator - a Fast Algorithm invented by Peter J.Rousseeuw and Katrien Van Dreissen "A Fast Algorithm for the Minimum covariance Determinant Estimator" Technometrics, August 1999, Vol.41, NO.3. More...

class	TRolke
	This class computes confidence intervals for the rate of a Poisson process in the presence of uncertain background and/or efficiency. More...

class	TRotation
	The TRotation class describes a rotation of objects of the TVector3 class. More...

class	TVector2
	TVector2 is a general two vector class, which can be used for the description of different vectors in 2D. More...

class	TVector3

The Physics Vector package consists of five classes:

Classes