framework data objects

Classes
class	BackgroundInfo
	This class stores the information about what background was mixed or overlayed. More...
class	BackgroundMetaData
	Metadata information about the beam background file. More...
class	BinnedEventT0
	Database object for storing a binned EventT0 coming from the trigger. More...
class	DigitBase
	A common base for subdetector Digits. More...
class	DisplayData
	Add custom information to the display. More...
class	EventExtraInfo
	Class to stores ExtraInfo of the whole event. More...
class	EventMetaData
	Store event, run, and experiment numbers. More...
class	EventT0
	Storage element for the eventwise T0 estimation. More...
class	FileMetaData
	Metadata information about a file. More...
class	Helix
	This class represents an ideal helix in perigee parameterization. More...
class	MCInitialParticles
	This class contains the initial state for the given event. More...
class	MergedEventConsistency
	Mark if we want to merge the DataStore of a combination of events or not. More...
class	ProfileInfo
	Store execution time and memory usage. More...
class	RelationContainer
	Class to store relations between StoreArrays in the DataStore. More...
class	RelationElement
	Class to store a single element of a relation. More...
class	TestChunkData
	Storable object which can be filled with random chunk data of a certain size. More...
class	UncertainHelix
	This class represents an ideal helix in perigee parameterization including the covariance matrix of the 5 perigee parameters. More...

Functions
std::ostream &	operator<< (std::ostream &output, const Helix &helix)
	Output operator for debugging and the generation of unittest error messages.
void	calculateBoost () const
	Calculate the Lorentz transformations LAB->CMS & CMS->LAB if necessary.
void	resetBoost ()
	Reset cached transformations after changing parameters.

Detailed Description

Function Documentation

calculateBoost()

void calculateBoost ( ) const

inlineprivate

Calculate the Lorentz transformations LAB->CMS & CMS->LAB if necessary.

Definition at line 258 of file MCInitialParticles.h.

  {
    if (m_labToCMS)
      return;
 
    ROOT::Math::PxPyPzEVector beam = m_her + m_ler;
    // Save the invariant mass because it's used very often in analysis
    m_invariantMass = beam.M();
 
    // If we generate events in CMS we already are in CMS and there is no
    // transformation so let's use the identity
    if (hasGenerationFlags(c_generateCMS)) {
      m_labToCMS = new ROOT::Math::LorentzRotation();
      m_CMSToLab = new ROOT::Math::LorentzRotation();
      return;
    }
 
    m_boostedHER = ROOT::Math::LorentzRotation(ROOT::Math::Boost(beam.BoostToCM())) * m_her;
    double cmsAngleXZ = atan(m_boostedHER.X() / m_boostedHER.Z());
    double cmsAngleYZ = atan(m_boostedHER.Y() / m_boostedHER.Z());
    m_labToCMS = new ROOT::Math::LorentzRotation(
      LabToCms::rotateLabToCms(-beam.BoostToCM(), cmsAngleXZ, cmsAngleYZ)
    );
 
    //cache derived quantities
    m_CMSToLab = new ROOT::Math::LorentzRotation(m_labToCMS->Inverse());
  }

operator<<()

std::ostream & operator<<	(	std::ostream &	output,
		const Helix &	helix
	)

Output operator for debugging and the generation of unittest error messages.

Definition at line 631 of file Helix.cc.

  {
    return output
           << "Helix("
           << "d0=" << helix.getD0() << ", "
           << "phi0=" << helix.getPhi0() << ", "
           << "omega=" << helix.getOmega() << ", "
           << "z0=" << helix.getZ0() << ", "
           << "tanLambda=" << helix.getTanLambda() << ")";
  }

resetBoost()

void resetBoost ( )

inlineprivate

Reset cached transformations after changing parameters.

Definition at line 290 of file MCInitialParticles.h.

  {
    delete m_labToCMS;
    delete m_CMSToLab;
    m_labToCMS = nullptr;
    m_CMSToLab = nullptr;
    m_invariantMass = 0.0;
    m_boostedHER = ROOT::Math::PxPyPzEVector();
  }