Rivet
1.8.0
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Calculate the Parisi event shape tensor (or linear momentum tensor). More...
#include <ParisiTensor.hh>
Public Member Functions | |
ParisiTensor (const FinalState &fsp) | |
Constructor. The provided FinalState projection must live throughout the run. | |
virtual const Projection * | clone () const |
Clone on the heap. | |
void | clear () |
Clear the projection. | |
Access the C and D params. | |
double | C () const |
double | D () const |
Access the eigenvalues of \f$\theta\f$. | |
double | lambda1 () const |
double | lambda2 () const |
double | lambda3 () const |
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bool | before (const Projection &p) const |
virtual const std::set< PdgIdPair > | beamPairs () const |
virtual std::string | name () const |
Get the name of the projection. | |
Projection & | addPdgIdPair (PdgId beam1, PdgId beam2) |
Add a colliding beam pair. | |
Log & | getLog () const |
Get a Log object based on the getName() property of the calling projection object. | |
void | setName (const std::string &name) |
Used by derived classes to set their name. | |
Projection () | |
The default constructor. | |
virtual | ~Projection () |
The destructor. | |
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ProjectionApplier () | |
Constructor. | |
std::set< ConstProjectionPtr > | getProjections () const |
Get the contained projections, including recursion. | |
template<typename PROJ > | |
const PROJ & | getProjection (const std::string &name) const |
Get the named projection, specifying return type via a template argument. | |
const Projection & | getProjection (const std::string &name) const |
template<typename PROJ > | |
const PROJ & | applyProjection (const Event &evt, const PROJ &proj) const |
Apply the supplied projection on event. | |
template<typename PROJ > | |
const PROJ & | applyProjection (const Event &evt, const Projection &proj) const |
Apply the supplied projection on event. | |
template<typename PROJ > | |
const PROJ & | applyProjection (const Event &evt, const std::string &name) const |
Apply the named projection on event. |
Protected Member Functions | |
void | project (const Event &e) |
Perform the projection on the Event. | |
int | compare (const Projection &p) const |
Compare with other projections. | |
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Cmp< Projection > | mkNamedPCmp (const Projection &otherparent, const std::string &pname) const |
Cmp< Projection > | mkPCmp (const Projection &otherparent, const std::string &pname) const |
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ProjectionHandler & | getProjHandler () const |
Get a reference to the ProjectionHandler for this thread. | |
template<typename PROJ > | |
const PROJ & | addProjection (const PROJ &proj, const std::string &name) |
Calculate the Parisi event shape tensor (or linear momentum tensor).
The Parisi event shape C and D variables are derived from the eigenvalues of the linear momentum tensor
which is actually a linearized (and hence infra-red safe) version of the Sphericity tensor.
Defining the three eigenvalues of
, with
, the C and D parameters are defined as
and
Internally, this Projection uses the Sphericity projection with the generalising
parameter set to 1.