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PYTHIA
8.312
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#include <Analysis.h>
Public Member Functions | |
| SlowJet (int powerIn, double Rin, double pTjetMinIn=0., double etaMaxIn=25., int selectIn=2, int massSetIn=2, SlowJetHook *sjHookPtrIn=0, bool useFJcoreIn=true, bool useStandardRin=true) | |
| Constructor. | |
| virtual | ~SlowJet () |
| Destructor. | |
| bool | analyze (const Event &event) |
| Analyze event, all in one go. | |
| bool | setup (const Event &event) |
| Set up list of particles to analyze, and initial distances. More... | |
| virtual bool | doStep () |
| Do one recombination step, possibly giving a jet. More... | |
| bool | doNSteps (int nStep) |
| Do several recombinations steps, if possible. | |
| bool | stopAtN (int nStop) |
| Do recombinations until fixed numbers of clusters and jets remain. | |
| int | sizeOrig () const |
| Return info on jet (+cluster) results of analysis. | |
| int | sizeJet () const |
| int | sizeAll () const |
| double | pT (int i) const |
| double | y (int i) const |
| double | phi (int i) const |
| Vec4 | p (int i) const |
| double | m (int i) const |
| int | multiplicity (int i) const |
| int | iNext () const |
| Return info on next step to be taken. | |
| int | jNext () const |
| double | dNext () const |
| void | list (bool listAll=false) const |
| Provide a listing of the info. More... | |
| vector< int > | constituents (int j) |
| Give a list of all particles in the jet. | |
| vector< int > | clusConstituents (int j) |
| Give a list of all particles in the cluster. | |
| int | jetAssignment (int i) |
| void | removeJet (int i) |
| Remove a jet. | |
Protected Member Functions | |
| virtual void | findNext () |
| Find next cluster pair to join. More... | |
| bool | clusterFJ () |
| Use FJcore interface to perform clustering. More... | |
Protected Attributes | |
| int | power |
| Properties of analysis as such. | |
| double | R |
| double | pTjetMin |
| double | etaMax |
| double | R2 |
| double | pT2jetMin |
| int | select |
| int | massSet |
| SlowJetHook * | sjHookPtr |
| SlowJetHook can be used to tailor particle selection step. | |
| bool | useFJcore |
| bool | useStandardR |
| bool | isAnti |
| bool | isKT |
| bool | cutInEta |
| bool | chargedOnly |
| bool | visibleOnly |
| bool | modifyMass |
| bool | noHook |
| vector< SingleSlowJet > | clusters |
| Intermediate clustering objects and final jet objects. | |
| vector< SingleSlowJet > | jets |
| vector< double > | diB |
| Intermediate clustering distances. | |
| vector< double > | dij |
| int | origSize |
| Other intermediate variables. | |
| int | clSize |
| int | clLast |
| int | jtSize |
| int | iMin |
| int | jMin |
| double | dPhi |
| double | dijTemp |
| double | dMin |
Static Protected Attributes | |
| static const int | TIMESTOPRINT = 1 |
| Constants: could only be changed in the code itself. More... | |
| static const double | PIMASS = 0.13957 |
| Assume the pi+- mass for all particles, except the photon, in one option. | |
| static const double | TINY = 1e-20 |
| Small number to avoid division by zero. | |
SlowJet class. This class performs a recombination jet search in (y, phi, pT) space.
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protected |
Use FJcore interface to perform clustering.
Read in input configuration of particles.
Create a jet definition = jet algorithm + radius parameter.
Run the jet clustering with the above jet definition.
Get the resulting jets above pTmin, ordered in pT.
Store the FJcore output in the standard SlowJet format.
Also find constituents of jet.
Set counters and some dummy (for FJcore) information.
Done.
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virtual |
Do one recombination step, possibly giving a jet.
Fail if using FJcore or if no possibility to take a step.
When distance to beam is smallest the cluster is promoted to jet.
Store new jet if its pT is above pTMin.
Order jets in decreasing pT.
When distance between two clusters is smallest they are joined.
Add iMin cluster to jMin.
Update distances for and to new jMin.
Move up last cluster and distances to vacated position iMin.
Shrink cluster list by one.
Find next cluster pair to join.
Done.
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protectedvirtual |
Find next cluster pair to join.
Find smallest of diB, dij.
If no clusters left then instead default values.
Reimplemented in HJSlowJet.
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inline |
Give the index of the jet that the particle i of the event record belongs to. Returns -1 if particle i is not found in a jet.
| void list | ( | bool | listAll = false | ) | const |
Provide a listing of the info.
Header.
The jets.
Optionally list also clusters not yet jets.
Listing finished.
| bool setup | ( | const Event & | event | ) |
Set up list of particles to analyze, and initial distances.
Initial values zero.
Loop over final particles in the event.
Always apply selection options for visible or charged particles.
Normally use built-in selection machinery.
Pseudorapidity cut to describe detector range.
Optionally modify mass and energy.
Alternatively pass info to SlowJetHook for decision. User can also modify pTemp and mTemp.
Store particle momentum, including some derived quantities.
Done here for FJcore machinery.
Resize arrays to store distances between clusters.
Loop through particles and find distance to beams.
Loop through pairs and find relative distance.
End of original-particle loops.
Find first particle pair to join.
Done.
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staticprotected |
Constants: could only be changed in the code itself.
Minimum number of particles to perform study.
SlowJet class. This class performs clustering in (y, phi, pT) space. Constants: could be changed here if desired, but normally should not. These are of technical nature, as described for each.
1.8.11
