#include <PtEstimationTool.h>

Inheritance diagram for L0MDT::PtEstimationTool:

Collaboration diagram for L0MDT::PtEstimationTool:

Public Member Functions
virtual	~PtEstimationTool () override=default
virtual StatusCode	initialize () override
virtual std::optional< PtEstimate >	estimatePt (const Segment biSeg, const Segment bmSeg, const Segment *boSeg) const override
	Estimate the transverse momentum from up to three MDT segment references.
	AthAlgTool (const std::string &type, const std::string &name, const IInterface *parent)
	Constructor with parameters:
ServiceHandle< StoreGateSvc > &	evtStore ()
	The standard `StoreGateSvc` (event store) Returns (kind of) a pointer to the `StoreGateSvc`.
const ServiceHandle< StoreGateSvc > &	detStore () const
	The standard `StoreGateSvc/DetectorStore` Returns (kind of) a pointer to the `StoreGateSvc`.
virtual StatusCode	sysInitialize () override
	Perform system initialization for an algorithm.
virtual StatusCode	sysStart () override
	Handle START transition.
virtual std::vector< Gaudi::DataHandle * >	inputHandles () const override
	Return this algorithm's input handles.
virtual std::vector< Gaudi::DataHandle * >	outputHandles () const override
	Return this algorithm's output handles.
Gaudi::Details::PropertyBase &	declareProperty (Gaudi::Property< T, V, H > &t)
void	updateVHKA (Gaudi::Details::PropertyBase &)
MsgStream &	msg () const
bool	msgLvl (const MSG::Level lvl) const
	DeclareInterfaceID (IPtEstimationTool, 1, 0)

Protected Member Functions
void	renounceArray (SG::VarHandleKeyArray &handlesArray)
	remove all handles from I/O resolution
std::enable_if_t< std::is_void_v< std::result_of_t< decltype(&T::renounce)(T)> > &&!std::is_base_of_v< SG::VarHandleKeyArray, T > &&std::is_base_of_v< Gaudi::DataHandle, T >, void >	renounce (T &h)
void	extraDeps_update_handler (Gaudi::Details::PropertyBase &ExtraDeps)
	Add StoreName to extra input/output deps as needed.

Private Types
typedef ServiceHandle< StoreGateSvc >	StoreGateSvc_t

Private Member Functions
float	estimateTwoStationPt (float deltaBeta) const
	Compute a toy pT proxy from the angular deflection between two stations.
float	estimateThreeStationPt (float sagitta, float leverArm) const
	Compute a toy pT proxy from the sagitta and lever arm of a three-station track.
Gaudi::Details::PropertyBase &	declareGaudiProperty (Gaudi::Property< T, V, H > &hndl, const SG::VarHandleKeyType &)
	specialization for handling Gaudi::Property<SG::VarHandleKey>

Private Attributes
StoreGateSvc_t	m_evtStore
	Pointer to StoreGate (event store by default).
StoreGateSvc_t	m_detStore
	Pointer to StoreGate (detector store by default).
std::vector< SG::VarHandleKeyArray * >	m_vhka
bool	m_varHandleArraysDeclared

Detailed Description

Definition at line 13 of file PtEstimationTool.h.

Member Typedef Documentation

◆ StoreGateSvc_t

typedef ServiceHandle<StoreGateSvc> AthCommonDataStore< AthCommonMsg< AlgTool > >::StoreGateSvc_t

privateinherited

Definition at line 388 of file AthCommonDataStore.h.

Constructor & Destructor Documentation

◆ ~PtEstimationTool()

virtual L0MDT::PtEstimationTool::~PtEstimationTool ( )

overridevirtualdefault

Member Function Documentation

◆ AthAlgTool()

AthAlgTool::AthAlgTool	(	const std::string &	type,
		const std::string &	name,
		const IInterface *	parent )

Constructor with parameters:

Definition at line 31 of file AthAlgTool.cxx.

                                       : 
  AthCommonDataStore<AthCommonMsg<AlgTool>> ( type, name, parent )
{
}

◆ declareGaudiProperty()

Gaudi::Details::PropertyBase & AthCommonDataStore< AthCommonMsg< AlgTool > >::declareGaudiProperty	(	Gaudi::Property< T, V, H > &	hndl,
		const SG::VarHandleKeyType &	)

inlineprivateinherited

specialization for handling Gaudi::Property<SG::VarHandleKey>

Definition at line 156 of file AthCommonDataStore.h.

  {
    return *AthCommonDataStore<PBASE>::declareProperty(hndl.name(),
                                                       hndl.value(), 
                                                       hndl.documentation());
 
  }

◆ DeclareInterfaceID()

L0MDT::IPtEstimationTool::DeclareInterfaceID	(	IPtEstimationTool	,
		1	,
		0	)

inherited

◆ declareProperty()

Gaudi::Details::PropertyBase & AthCommonDataStore< AthCommonMsg< AlgTool > >::declareProperty ( Gaudi::Property< T, V, H > & t )

inlineinherited

Definition at line 145 of file AthCommonDataStore.h.

                                                                     {
    typedef typename SG::HandleClassifier<T>::type htype;
    return AthCommonDataStore<PBASE>::declareGaudiProperty(t, htype());
  }

◆ detStore()

const ServiceHandle< StoreGateSvc > & AthCommonDataStore< AthCommonMsg< AlgTool > >::detStore ( ) const

inlineinherited

The standard StoreGateSvc/DetectorStore Returns (kind of) a pointer to the StoreGateSvc.

Definition at line 95 of file AthCommonDataStore.h.

95{ return m_detStore; }

AthCommonDataStore< AthCommonMsg< AlgTool > >::m_detStore

StoreGateSvc_t m_detStore

Definition AthCommonDataStore.h:393

◆ estimatePt()

std::optional< PtEstimate > L0MDT::PtEstimationTool::estimatePt	(	const Segment *	biSeg,
		const Segment *	bmSeg,
		const Segment *	boSeg ) const

overridevirtual

Estimate the transverse momentum from up to three MDT segment references.

Parameters

biSeg	Pointer to the BI segment, or nullptr if not available
bmSeg	Pointer to the BM segment, or nullptr if not available
boSeg	Pointer to the BO segment, or nullptr if not available

Returns: A PtEstimate if at least two stations are available, std::nullopt otherwise

Implements L0MDT::IPtEstimationTool.

Definition at line 61 of file PtEstimationTool.cxx.

                                                                                   {
  const bool hasBI = (biSeg != nullptr);
  const bool hasBM = (bmSeg != nullptr);
  const bool hasBO = (boSeg != nullptr);
 
  const unsigned int nStations = static_cast<unsigned int>(hasBI) +
                                 static_cast<unsigned int>(hasBM) +
                                 static_cast<unsigned int>(hasBO);
 
  // A meaningful geometric proxy needs at least two stations
  if (nStations < 2) {
    ATH_MSG_DEBUG("PtEstimationTool: fewer than 2 stations available, no pT proxy computed");
    return std::nullopt;
  }
 
  PtEstimate result{};
  result.nStations = nStations;
 
  // --------------------------------------------------------------------------
  // Two-station mode
  //
  // This branch estimates a toy pT proxy from the change in segment angle.
  // This is only a bending proxy and is not a calibrated momentum estimate.
  // --------------------------------------------------------------------------
  if (nStations == 2) {
    const Segment* inner = nullptr;
    const Segment* outer = nullptr;
 
    if (hasBI && hasBM) {
      inner = biSeg;
      outer = bmSeg;
    } else if (hasBI && hasBO) {
      inner = biSeg;
      outer = boSeg;
    } else if (hasBM && hasBO) {
      inner = bmSeg;
      outer = boSeg;
    }
 
    if (!inner || !outer) {
      ATH_MSG_WARNING("PtEstimationTool: invalid 2-station configuration");
      return std::nullopt;
    }
 
    const float thetaInner = thetaFromSlope(inner->m());
    const float thetaOuter = thetaFromSlope(outer->m());
 
    result.deltaBeta = thetaOuter - thetaInner;
    result.pt = estimateTwoStationPt(result.deltaBeta);
 
    ATH_MSG_DEBUG("Temporary 2-station pT proxy | "
                  << "deltaBeta=" << result.deltaBeta
                  << " ptProxy=" << result.pt);
 
    return result;
  }
 
  // --------------------------------------------------------------------------
  // Three-station mode
  //
  // This branch estimates a toy pT proxy from sagitta and lever arm.
  // The result is purely geometric and ignores magnetic field and calibration.
  // --------------------------------------------------------------------------
  const float sagitta = pointToLineDistance(
      bmSeg->zRef(), bmSeg->rRef(),
      biSeg->zRef(), biSeg->rRef(),
      boSeg->zRef(), boSeg->rRef());
 
  const float leverArm = std::hypot(
      boSeg->zRef() - biSeg->zRef(),
      boSeg->rRef() - biSeg->rRef());
 
  result.sagitta = sagitta;
  result.leverArm = leverArm;
  result.pt = estimateThreeStationPt(result.sagitta, result.leverArm);
 
  ATH_MSG_DEBUG("Temporary 3-station pT proxy | "
                << "sagitta=" << result.sagitta
                << " leverArm=" << result.leverArm
                << " ptProxy=" << result.pt);
 
  return result;
}

◆ estimateThreeStationPt()

float L0MDT::PtEstimationTool::estimateThreeStationPt	(	float	sagitta,
		float	leverArm ) const

private

Compute a toy pT proxy from the sagitta and lever arm of a three-station track.

Parameters

sagitta	Perpendicular distance of the middle station from the BI-BO line [mm]
leverArm	Distance between inner and outer station in the (z, r) plane [mm]

Definition at line 162 of file PtEstimationTool.cxx.

                                                                                  {
  // Protection against vanishing sagitta
  constexpr float minAbsSagitta = 1.e-3f;
 
  // Purely ad hoc scale factor for a temporary proxy
  constexpr float kToyPtScale = 1.e-3f;
 
  const float absSagitta = std::max(std::abs(sagitta), minAbsSagitta);
 
  // Temporary proxy: pT ~ L^2 / sagitta
  return kToyPtScale * leverArm * leverArm / absSagitta;
}

◆ estimateTwoStationPt()

float L0MDT::PtEstimationTool::estimateTwoStationPt ( float deltaBeta ) const

private

Compute a toy pT proxy from the angular deflection between two stations.

Parameters

deltaBeta Difference in segment angle between inner and outer station [rad]

Definition at line 148 of file PtEstimationTool.cxx.

                                                                  {
  // Protection against vanishing angular difference
  constexpr float minAbsDeltaBeta = 1.e-4f;
 
  // Purely ad hoc scale factor for a temporary proxy
  constexpr float kToyPtScale = 1000.f;
 
  const float absDeltaBeta = std::max(std::abs(deltaBeta), minAbsDeltaBeta);
 
  // Temporary proxy: larger bending -> lower pT proxy
  return kToyPtScale / absDeltaBeta;
}

◆ evtStore()

ServiceHandle< StoreGateSvc > & AthCommonDataStore< AthCommonMsg< AlgTool > >::evtStore ( )

inlineinherited

The standard StoreGateSvc (event store) Returns (kind of) a pointer to the StoreGateSvc.

Definition at line 85 of file AthCommonDataStore.h.

85{ return m_evtStore; }

AthCommonDataStore< AthCommonMsg< AlgTool > >::m_evtStore

StoreGateSvc_t m_evtStore

Definition AthCommonDataStore.h:390

◆ extraDeps_update_handler()

void AthCommonDataStore< AthCommonMsg< AlgTool > >::extraDeps_update_handler ( Gaudi::Details::PropertyBase & ExtraDeps )

protectedinherited

Add StoreName to extra input/output deps as needed.

use the logic of the VarHandleKey to parse the DataObjID keys supplied via the ExtraInputs and ExtraOuputs Properties to add the StoreName if it's not explicitly given

◆ initialize()

StatusCode L0MDT::PtEstimationTool::initialize ( )

overridevirtual

Definition at line 55 of file PtEstimationTool.cxx.

                                        {
  ATH_MSG_DEBUG("Initializing " << name());
 
  return StatusCode::SUCCESS;
}

◆ inputHandles()

virtual std::vector< Gaudi::DataHandle * > AthCommonDataStore< AthCommonMsg< AlgTool > >::inputHandles ( ) const

overridevirtualinherited

Return this algorithm's input handles.

We override this to include handle instances from key arrays if they have not yet been declared. See comments on updateVHKA.

◆ msg()

MsgStream & AthCommonMsg< AlgTool >::msg ( ) const

inlineinherited

Definition at line 24 of file AthCommonMsg.h.

                                {
    return this->msgStream();
  }

◆ msgLvl()

bool AthCommonMsg< AlgTool >::msgLvl ( const MSG::Level lvl ) const

inlineinherited

Definition at line 30 of file AthCommonMsg.h.

                                               {
    return this->msgLevel(lvl);
  }

◆ outputHandles()

virtual std::vector< Gaudi::DataHandle * > AthCommonDataStore< AthCommonMsg< AlgTool > >::outputHandles ( ) const

overridevirtualinherited

Return this algorithm's output handles.

We override this to include handle instances from key arrays if they have not yet been declared. See comments on updateVHKA.

◆ renounce()

std::enable_if_t< std::is_void_v< std::result_of_t< decltype(&T::renounce)(T)> > &&!std::is_base_of_v< SG::VarHandleKeyArray, T > &&std::is_base_of_v< Gaudi::DataHandle, T >, void > AthCommonDataStore< AthCommonMsg< AlgTool > >::renounce ( T & h )

inlineprotectedinherited

Definition at line 380 of file AthCommonDataStore.h.

  {
    h.renounce();
    PBASE::renounce (h);
  }

◆ renounceArray()

void AthCommonDataStore< AthCommonMsg< AlgTool > >::renounceArray ( SG::VarHandleKeyArray & handlesArray )

inlineprotectedinherited

remove all handles from I/O resolution

Definition at line 364 of file AthCommonDataStore.h.

                                                          {
    handlesArray.renounce();
  }

◆ sysInitialize()

virtual StatusCode AthCommonDataStore< AthCommonMsg< AlgTool > >::sysInitialize ( )

overridevirtualinherited

Perform system initialization for an algorithm.

We override this to declare all the elements of handle key arrays at the end of initialization. See comments on updateVHKA.

Reimplemented in asg::AsgMetadataTool, AthCheckedComponent< AthAlgTool >, AthCheckedComponent<::AthAlgTool >, and DerivationFramework::CfAthAlgTool.

◆ sysStart()

virtual StatusCode AthCommonDataStore< AthCommonMsg< AlgTool > >::sysStart ( )

overridevirtualinherited

Handle START transition.

We override this in order to make sure that conditions handle keys can cache a pointer to the conditions container.

◆ updateVHKA()

void AthCommonDataStore< AthCommonMsg< AlgTool > >::updateVHKA ( Gaudi::Details::PropertyBase & )

inlineinherited

Definition at line 308 of file AthCommonDataStore.h.

                                               {
    // debug() << "updateVHKA for property " << p.name() << " " << p.toString() 
    //         << "  size: " << m_vhka.size() << endmsg;
    for (auto &a : m_vhka) {
      std::vector<SG::VarHandleKey*> keys = a->keys();
      for (auto k : keys) {
        k->setOwner(this);
      }
    }
  }

Member Data Documentation

◆ m_detStore

StoreGateSvc_t AthCommonDataStore< AthCommonMsg< AlgTool > >::m_detStore

privateinherited

Pointer to StoreGate (detector store by default).

Definition at line 393 of file AthCommonDataStore.h.

◆ m_evtStore

StoreGateSvc_t AthCommonDataStore< AthCommonMsg< AlgTool > >::m_evtStore

privateinherited

Pointer to StoreGate (event store by default).

Definition at line 390 of file AthCommonDataStore.h.

◆ m_varHandleArraysDeclared

bool AthCommonDataStore< AthCommonMsg< AlgTool > >::m_varHandleArraysDeclared

privateinherited

Definition at line 399 of file AthCommonDataStore.h.

◆ m_vhka

std::vector<SG::VarHandleKeyArray*> AthCommonDataStore< AthCommonMsg< AlgTool > >::m_vhka

privateinherited

Definition at line 398 of file AthCommonDataStore.h.

The documentation for this class was generated from the following files:

Public Member Functions

Protected Member Functions

Private Types

Private Member Functions

Private Attributes

Detailed Description

Member Typedef Documentation

◆ StoreGateSvc_t

Constructor & Destructor Documentation

◆ ~PtEstimationTool()

Member Function Documentation

◆ AthAlgTool()

◆ declareGaudiProperty()

◆ DeclareInterfaceID()

◆ declareProperty()

◆ detStore()

◆ estimatePt()

◆ estimateThreeStationPt()

◆ estimateTwoStationPt()

◆ evtStore()

◆ extraDeps_update_handler()

◆ initialize()

◆ inputHandles()

◆ msg()

◆ msgLvl()

◆ outputHandles()

◆ renounce()

◆ renounceArray()

◆ sysInitialize()

◆ sysStart()

◆ updateVHKA()

Member Data Documentation

◆ m_detStore

◆ m_evtStore

◆ m_varHandleArraysDeclared

◆ m_vhka