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econte |
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#ifndef Alignment_TwoBodyDecay_TwoBodyDecayDerivatives_h
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#define Alignment_TwoBodyDecay_TwoBodyDecayDerivatives_h
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#include "Alignment/TwoBodyDecay/interface/TwoBodyDecay.h"
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/** /class TwoBodyDecayDerivatives
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*
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* This class provides the derivatives matrices need by the class TwoBodyDecayEstimator.
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*
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* /author Edmund Widl
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*/
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class TwoBodyDecayDerivatives
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{
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public:
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enum { dimension = 6 };
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enum DerivativeParameterName { px = 1, py = 2, pz = 3, theta = 4, phi = 5, mass = 6 };
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TwoBodyDecayDerivatives( double mPrimary = 91.1876, double mSecondary = 0.105658 );
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~TwoBodyDecayDerivatives();
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/**Derivatives of the lab frame momenta (in cartesian representation) of the secondaries
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* w.r.t. z=(px,py,pz,theta,phi,m).
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*/
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const std::pair< AlgebraicMatrix, AlgebraicMatrix > derivatives( const TwoBodyDecay & tbd ) const;
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/**Derivatives of the lab frame momenta (in cartesian representation) of the secondaries
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* w.r.t. z=(px,py,pz,theta,phi,m).
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*/
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const std::pair< AlgebraicMatrix, AlgebraicMatrix > derivatives( const TwoBodyDecayParameters & param ) const;
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/**Derivatives of the lab frame momenta (in cartesian representation) of the secondaries
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* w.r.t. the selected parameters.
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*/
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const std::pair< AlgebraicMatrix, AlgebraicMatrix > selectedDerivatives( const TwoBodyDecay & tbd,
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const std::vector< bool > & selector ) const;
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/**Derivatives of the lab frame momenta (in cartesian representation) of the secondaries
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* w.r.t. the selected parameters.
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*/
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const std::pair< AlgebraicMatrix, AlgebraicMatrix > selectedDerivatives( const TwoBodyDecayParameters & param,
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const std::vector< bool > & selector ) const;
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private:
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/**Derivatives of the lab frame momenta of the secondaries w.r.t. px of the primary particle.
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*/
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const std::pair< AlgebraicMatrix, AlgebraicMatrix > dqsdpx( const TwoBodyDecayParameters & param ) const;
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/**Derivatives of the lab frame momenta of the secondaries w.r.t. py of the primary particle.
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*/
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const std::pair< AlgebraicMatrix, AlgebraicMatrix > dqsdpy( const TwoBodyDecayParameters & param ) const;
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/**Derivatives of the lab frame momenta of the secondaries w.r.t. pz of the primary particle.
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*/
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const std::pair< AlgebraicMatrix, AlgebraicMatrix > dqsdpz( const TwoBodyDecayParameters & param ) const;
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/**Derivatives of the lab frame momenta of the secondaries w.r.t. the decay angle theta in the primary's rest frame.
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*/
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const std::pair< AlgebraicMatrix, AlgebraicMatrix > dqsdtheta( const TwoBodyDecayParameters & param ) const;
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/**Derivatives of the lab frame momenta of the secondaries w.r.t. the decay angle phi in the primary's rest frame.
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*/
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const std::pair< AlgebraicMatrix, AlgebraicMatrix > dqsdphi( const TwoBodyDecayParameters & param ) const;
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/**Derivatives of the lab frame momenta of the secondaries w.r.t. the mass of the primary
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*/
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const std::pair< AlgebraicMatrix, AlgebraicMatrix > dqsdm( const TwoBodyDecayParameters & param ) const;
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const std::pair< AlgebraicMatrix, AlgebraicMatrix > dqsdzi( const TwoBodyDecayParameters & param, const DerivativeParameterName & i ) const;
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double thePrimaryMass;
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double theSecondaryMass;
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};
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#endif
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