ErrorMatrixPxPyPzM.h

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/*
  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef ErrorMatrixPxPyPzM_H
#define ErrorMatrixPxPyPzM_H
 
#include "FourMom/ErrorMatrixBase.h"
 
#include <cmath>
 
class ErrorMatrixPxPyPzM : private ErrorMatrixBase< ErrorMatrixPxPyPzM> {
public:
  
  typedef ErrorMatrixBase< ErrorMatrixPxPyPzM> Base;
 
  enum Index {ipx=0,ipy=1,ipz=2,ie=3};
 
  ErrorMatrixPxPyPzM();  
 
  ErrorMatrixPxPyPzM( const CLHEP::HepSymMatrix& mat);
 
  using Base::operator();
  using Base::hsm;
  using Base::num_row;
  using Base::num_col;
 
  double pxError() const {
    return std::sqrt( impl()(ipx,ipx));
  }
 
 
};
 
#endif