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EMCalTriggerPtAnalysis::AliEmcalTriggerOfflineSelection Class Reference

Helper class selecting events on the presence of a trigger patch for the given type above threshold. More...

#include <AliEmcalTriggerOfflineSelection.h>

Inheritance diagram for EMCalTriggerPtAnalysis::AliEmcalTriggerOfflineSelection:

Public Types

enum  EmcalTriggerClass {
  kTrgEL0 = 0, kTrgEG1, kTrgEG2, kTrgEJ1,
  kTrgEJ2, kTrgDL0, kTrgDG1, kTrgDG2,
  kTrgDJ1, kTrgDJ2, kTrgn
}
 Definition of the various supported trigger types. More...
 

Public Member Functions

 AliEmcalTriggerOfflineSelection ()
 
virtual ~AliEmcalTriggerOfflineSelection ()
 
void SetOfflineEnergyThreshold (EmcalTriggerClass trgcls, double threshold)
 
void SetAcceptanceMap (EmcalTriggerClass trgcls, const TH2 *accmap)
 
Bool_t IsOfflineSelected (EmcalTriggerClass trgcls, const TClonesArray *const triggerpatches) const
 
Double_t GetThresholdForTrigger (EmcalTriggerClass trgcls) const
 

Static Public Member Functions

static Bool_t IsSingleShower (EmcalTriggerClass cls)
 
static Bool_t IsDCAL (EmcalTriggerClass cls)
 
static const TStringGetTriggerName (EmcalTriggerClass cls)
 

Protected Attributes

Double_t fOfflineEnergyThreshold [kTrgn]
 Thresholds applied on offline energy. More...
 
const TH2fAcceptanceMaps [kTrgn]
 ! Online acceptance distribution More...
 

Static Protected Attributes

static const TString fgkTriggerNames [kTrgn]
 Names of the various trigger classes. More...
 

Detailed Description

Helper class selecting events on the presence of a trigger patch for the given type above threshold.

Author
Markus Fasel marku.nosp@m.s.fa.nosp@m.sel@c.nosp@m.ern..nosp@m.ch, Lawrence Berkeley National Laboratory
Since
Feb 23, 2016

AliEmcalTriggerOffline selection provides the functionality to select triggered events based on the presence of a trigger patch for the given type above energy threshold. As convention the calibrated energy from cells is used to select patches above threshold. Energy thresholds can be set via

// Setting 10 GeV threshold for the L1 gamma trigger
sel.SetOfflineEnergyThreshold(AliEmcalTriggerOfflineSelection::kTrgEG1, 10.);

In order to mimic non-uniform trigger acceptance, acceptance maps from Data can be used in the trigger patch selection. When available, trigger patches are selected on a statistical basis using the map, which is expected to be normalized to the position with the maximum trigger counts, in order to provide a probability value. Acceptance maps are set via

TH2 *accEG1; // User is responsible to load the histogram
sel.SetAcceptanceMap(AliEmcalTriggerOfflineSelection::kTrgEG1, accEG1);

Attention: This class takes over ownership and expects the histogram to not belong to a directory. In case no acceptance map is providede, no acceptance mimicing is applied.

Definition at line 46 of file AliEmcalTriggerOfflineSelection.h.

Member Enumeration Documentation

Definition of the various supported trigger types.

Enumerator
kTrgEL0 

EMCAL L0 trigger.

kTrgEG1 

EMCAL L1 Gamma trigger, high threshold.

kTrgEG2 

EMCAL L1 Gamma trigger, low threshold.

kTrgEJ1 

EMCAL L1 Jet trigger, high threshold.

kTrgEJ2 

EMCAL L1 Jet trigger, low threshold.

kTrgDL0 

DCAL L0 trigger.

kTrgDG1 

DCAL L1 Gamma trigger, high threshold.

kTrgDG2 

DCAL L1 Gamma trigger, low threshold.

kTrgDJ1 

DCAL L1 Jet trigger, high threshold.

kTrgDJ2 

DCAL L1 Jet trigger, low threshold.

kTrgn 

Number of supported triggers.

Definition at line 52 of file AliEmcalTriggerOfflineSelection.h.

Constructor & Destructor Documentation

EMCalTriggerPtAnalysis::AliEmcalTriggerOfflineSelection::AliEmcalTriggerOfflineSelection ( )

Default constructor

Definition at line 37 of file AliEmcalTriggerOfflineSelection.cxx.

EMCalTriggerPtAnalysis::AliEmcalTriggerOfflineSelection::~AliEmcalTriggerOfflineSelection ( )
virtual

Destructor

Definition at line 42 of file AliEmcalTriggerOfflineSelection.cxx.

Member Function Documentation

Double_t EMCalTriggerPtAnalysis::AliEmcalTriggerOfflineSelection::GetThresholdForTrigger ( EmcalTriggerClass  trgcls) const
inline

Get the offline trigger threshold (on energy) for a given trigger class.

Parameters
[in]trgclsTrigger class for which to check the threshold
Returns
Threshold for the given trigger class (0 if not set)

Definition at line 114 of file AliEmcalTriggerOfflineSelection.h.

Referenced by EMCalTriggerPtAnalysis::AliAnalysisTaskEmcalClustersRef::FindPatchesForTrigger().

static const TString& EMCalTriggerPtAnalysis::AliEmcalTriggerOfflineSelection::GetTriggerName ( EmcalTriggerClass  cls)
inlinestatic

Get the name of the trigger class as string representation

Parameters
[in]clsEMCAL/DCAL trigger class
Returns
Name of the trigger class

Definition at line 135 of file AliEmcalTriggerOfflineSelection.h.

Bool_t EMCalTriggerPtAnalysis::AliEmcalTriggerOfflineSelection::IsDCAL ( EmcalTriggerClass  cls)
static

Checks if the trigger class is a jet patch trigger class

Parameters
[in]clsType of the trigger class to check
Returns
True if the trigger class is a single shower patch trigger class

Definition at line 98 of file AliEmcalTriggerOfflineSelection.cxx.

Referenced by EMCalTriggerPtAnalysis::AliAnalysisTaskEmcalClustersRef::FindPatchesForTrigger().

Bool_t EMCalTriggerPtAnalysis::AliEmcalTriggerOfflineSelection::IsOfflineSelected ( EmcalTriggerClass  trgcls,
const TClonesArray *const  triggerpatches 
) const

Apply additional cut requiring at least one offline patch above a given energy (not fake ADC!) Attention: This task groups into single shower triggers (L0, EG1, EG2) and jet triggers (EJ1 and EJ2). Per convention the low threshold patch is selected. No energy cut should be applied in the trigger maker.

Patches are supposed to contain masking done in the trigger maker. If available, an acceptance map can be used to mimic patch azimuthal acceptance in simulation.

Attention: The component take over ownership of the histogram. Need to be set to nullptr once the histogram is read in.

Parameters
[in]trgclsTrigger class for which to apply additional offline patch selection
[in]triggerpatchesArray of trigger patches
Returns
True if at least on patch above threshold is found or no cut is applied

Definition at line 48 of file AliEmcalTriggerOfflineSelection.cxx.

Referenced by EMCalTriggerPtAnalysis::AliAnalysisTaskEmcalTriggerBase::TriggerSelection().

Bool_t EMCalTriggerPtAnalysis::AliEmcalTriggerOfflineSelection::IsSingleShower ( EmcalTriggerClass  cls)
static

Checks if the trigger class is a single shower patch trigger class

Parameters
[in]clsType of the trigger class to check
Returns
True if the trigger class is a single shower patch trigger class

Definition at line 93 of file AliEmcalTriggerOfflineSelection.cxx.

Referenced by EMCalTriggerPtAnalysis::AliAnalysisTaskEmcalClustersRef::FindPatchesForTrigger(), and EMCalTriggerPtAnalysis::AliAnalysisTaskEmcalTriggerBase::SelectOnlineTrigger().

void EMCalTriggerPtAnalysis::AliEmcalTriggerOfflineSelection::SetAcceptanceMap ( EmcalTriggerClass  trgcls,
const TH2 accmap 
)
inline

Set acceptance map for a given trigger class. The acceptance map is expected to be normalized to 1 for the position with the largest trigger patch

Parameters
[in]trgclsTrigger class for which to set then acceptance map
[in]accmapAcceptance map as 2D histogram

Definition at line 90 of file AliEmcalTriggerOfflineSelection.h.

Referenced by EMCalTriggerPtAnalysis::AliAnalysisTaskEmcalTriggerBase::ExecOnce().

void EMCalTriggerPtAnalysis::AliEmcalTriggerOfflineSelection::SetOfflineEnergyThreshold ( EmcalTriggerClass  trgcls,
double  threshold 
)
inline

Specify threshold for a given offline trigger class. Convention is a threshold on the patch energy (from cells) in GeV

Parameters
[in]trgclsTrigger class for which to set the threshold
[in]thresholdThreshold value for the trigger class

Definition at line 82 of file AliEmcalTriggerOfflineSelection.h.

Member Data Documentation

const TH2* EMCalTriggerPtAnalysis::AliEmcalTriggerOfflineSelection::fAcceptanceMaps[kTrgn]
protected

! Online acceptance distribution

Definition at line 140 of file AliEmcalTriggerOfflineSelection.h.

Referenced by SetAcceptanceMap().

const TString EMCalTriggerPtAnalysis::AliEmcalTriggerOfflineSelection::fgkTriggerNames
staticprotected
Initial value:
= {
"EMC7", "EG1", "EG2", "EJ1", "EJ2", "DMC7", "DG1", "DG2", "DJ1", "DJ2"
}

Names of the various trigger classes.

Definition at line 138 of file AliEmcalTriggerOfflineSelection.h.

Referenced by GetTriggerName().

Double_t EMCalTriggerPtAnalysis::AliEmcalTriggerOfflineSelection::fOfflineEnergyThreshold[kTrgn]
protected

Thresholds applied on offline energy.

Definition at line 139 of file AliEmcalTriggerOfflineSelection.h.

Referenced by GetThresholdForTrigger(), and SetOfflineEnergyThreshold().


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