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JetSmearer.h

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// JetSmearer class
//
// Implements smearing for Jets
//
// Namespace Atlfast::
//
//--------------------------------------------------------------
//
// JetSmearer replicates the smearing code of ATLFAST++'s
// JetMaker. It provides the smear() method defined
// in the ISmearer interface. It privately inherits from
// the DefaultSmearer class to use its implementation of
// random number services etc.
//
// Authors: H.T.Phillips, P. Clarke, E. Richter-Was, P. Sherwood, R. Steward
//

#ifndef __Atlfast_Jetsmearer__
#define __Atlfast_Jetsmearer__


#include "AtlfastCode/ISmearer.h"
#include "AtlfastCode/DefaultSmearer.h"

class HepLorentzVector; //forward declaration

namespace Atlfast {
  class JetSmearer : virtual public ISmearer, 
                          virtual private DefaultSmearer 
    {
    public:
      //--------------------------------------------------------------------------
      // constructors and destructors- we can leave everything to DefaultSmearer
      //--------------------------------------------------------------------------
      JetSmearer(const int aseed, 
                 const int lumi, 
                 const double rconeb, 
                 const double rconef, 
                 const double barrelForwardEta) : 
        ISmearer(), 
        DefaultSmearer(aseed), 
        m_lumi(lumi), 
        m_rconeb(rconeb),
        m_rconef(rconef), 
        m_BarrelForwardEta(barrelForwardEta) 
        { }
      virtual ~JetSmearer() { }

      //--------------------------------------------------------------------------
      // the only thing we actually need to provide is the smear() method
      //--------------------------------------------------------------------------
      virtual HepLorentzVector smear(const HepLorentzVector& avec);

    private:
      //--------------------------------------------------------------------------
      // luminosity option. Currently using an int with 1= low lumi
      // 2 = high lumi. This is not very pleasant, but leave for now
      //--------------------------------------------------------------------------
      int m_lumi;
      double m_rconeb;
      double m_rconef;
      double m_BarrelForwardEta;
    };

} // end of namespace bracket

#endif

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