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Functions
pat::helper::ParametrizationHelper Namespace Reference

Functions

AlgebraicVector4 diffToParameters (pat::CandKinResolution::Parametrization parametrization, const math::XYZTLorentzVector &p4ini, const math::XYZTLorentzVector &p4fin)
 Expresses the difference between two 4-momentum vectors as a shift in coordinates in a given frame. More...
 
AlgebraicVector4 diffToParameters (pat::CandKinResolution::Parametrization parametrization, const math::PtEtaPhiMLorentzVector &p4ini, const math::PtEtaPhiMLorentzVector &p4fin)
 Expresses the difference between two 4-momentum vectors as a shift in coordinates in a given frame. More...
 
uint32_t dimension (pat::CandKinResolution::Parametrization parametrization)
 Returns the number of free parameters in a parametrization (3 or 4) More...
 
pat::CandKinResolution::Parametrization fromString (const std::string &name)
 Convert a name into a parametrization code. More...
 
bool isAlwaysMassive (pat::CandKinResolution::Parametrization parametrization)
 Is this parametrization usable only with massive objects? More...
 
bool isAlwaysMassless (pat::CandKinResolution::Parametrization parametrization)
 Is this parametrization usable only with massless objects? More...
 
bool isMassConstrained (pat::CandKinResolution::Parametrization parametrization)
 If this parametrization has a mass constraint (including the 'isAlwaysMassless' case) More...
 
bool isPhysical (pat::CandKinResolution::Parametrization parametrization, const AlgebraicVector4 &v4, const math::PtEtaPhiMLorentzVector &initialP4)
 
const char * name (pat::CandKinResolution::Parametrization param)
 Convert a number into a string. More...
 
math::XYZTLorentzVector p4fromParameters (pat::CandKinResolution::Parametrization parametrization, const AlgebraicVector4 &parameters, const math::XYZTLorentzVector &initialP4)
 
AlgebraicVector4 parametersFromP4 (pat::CandKinResolution::Parametrization parametrization, const math::XYZTLorentzVector &p4)
 Returns a vector of coordinates values given a coordinate frame and a 4-vector. More...
 
AlgebraicVector4 parametersFromP4 (pat::CandKinResolution::Parametrization parametrization, const math::PtEtaPhiMLorentzVector &p4)
 Returns a vector of coordinates values given a coordinate frame and a 4-vector. More...
 
math::PtEtaPhiMLorentzVector polarP4fromParameters (pat::CandKinResolution::Parametrization parametrization, const AlgebraicVector4 &parameters, const math::PtEtaPhiMLorentzVector &initialP4)
 
template<typename T >
void setParametersFromAnyVector (pat::CandKinResolution::Parametrization parametrization, AlgebraicVector4 &pars, const T &p4)
 For internal use only, so we provide only the interface. Use the 'setParametersFromP4'. More...
 
void setParametersFromP4 (pat::CandKinResolution::Parametrization parametrization, AlgebraicVector4 &pars, const math::XYZTLorentzVector &p4)
 Set the values of the parameters for a given 4-momentum. More...
 
void setParametersFromP4 (pat::CandKinResolution::Parametrization parametrization, AlgebraicVector4 &pars, const math::PtEtaPhiMLorentzVector &p4)
 Set the values of the parameters for a given 4-momentum. More...
 

Function Documentation

AlgebraicVector4 pat::helper::ParametrizationHelper::diffToParameters ( pat::CandKinResolution::Parametrization  parametrization,
const math::XYZTLorentzVector &  p4ini,
const math::XYZTLorentzVector &  p4fin 
)

Expresses the difference between two 4-momentum vectors as a shift in coordinates in a given frame.

Basically, if you do: pars = parametersFromP4(param, simp4); diff = diffToParameters(param, simP4, recP4); then up to roundoff errors recP4 == p4fromParameters(param, pars+diff, simP4);

Definition at line 322 of file ParametrizationHelper.cc.

References pat::CandKinResolution::Cart, pat::CandKinResolution::ECart, pat::CandKinResolution::EMomDev, pat::CandKinResolution::EScaledMomDev, pat::CandKinResolution::ESpher, pat::CandKinResolution::EtEtaPhi, pat::CandKinResolution::EtThetaPhi, Exception, pat::CandKinResolution::Invalid, M_PI, pat::CandKinResolution::MCCart, pat::CandKinResolution::MCMomDev, pat::CandKinResolution::MCPInvSpher, pat::CandKinResolution::MCSpher, pat::CandKinResolution::MomDev, p1, p2, parametersFromP4(), stringResolutionProvider_cfi::parametrization, and pat::CandKinResolution::Spher.

Referenced by diffToParameters(), and dimension().

324 {
325  AlgebraicVector4 ret;
326  switch (parametrization) {
327  case pat::CandKinResolution::Cart:
328  case pat::CandKinResolution::ECart:
329  case pat::CandKinResolution::MCCart:
330  case pat::CandKinResolution::Spher:
331  ret = parametersFromP4(parametrization,p4fin) - parametersFromP4(parametrization,p4ini);
332  break;
333  case pat::CandKinResolution::ESpher:
334  case pat::CandKinResolution::MCSpher:
335  case pat::CandKinResolution::MCPInvSpher:
336  case pat::CandKinResolution::EtThetaPhi:
337  case pat::CandKinResolution::EtEtaPhi:
338  ret = parametersFromP4(parametrization,p4fin) - parametersFromP4(parametrization,p4ini);
339  while(ret[2] > +M_PI) ret[2] -= (2*M_PI);
340  while(ret[2] < -M_PI) ret[2] += (2*M_PI);
341  break;
342  case pat::CandKinResolution::MCMomDev:
343  case pat::CandKinResolution::MomDev:
344  case pat::CandKinResolution::EMomDev:
345  case pat::CandKinResolution::EScaledMomDev:
346  {
347  typedef ROOT::Math::DisplacementVector3D< ROOT::Math::Cartesian3D<double> > V3Cart;
348  V3Cart p1 = p4ini.Vect(), p2 = p4fin.Vect();
349  V3Cart ur = p1.Unit();
350  V3Cart uz(0,0,1);
351  V3Cart uph = uz.Cross(ur).Unit();
352  V3Cart uth = ur.Cross(uph).Unit();
353  ret[0] = p2.Dot(ur)/p1.R() - 1.0;
354  ret[1] = (p2 - p1).Dot(uth);
355  ret[2] = (p2 - p1).Dot(uph);
356  if (parametrization == pat::CandKinResolution::MomDev) {
357  ret[3] = p4fin.mass()/p4ini.mass() - 1.0;
358  } else if (parametrization == pat::CandKinResolution::EMomDev) {
359  ret[3] = p4fin.energy()/p4ini.energy() - 1.0;
360  }
361  }
362  break;
363  case pat::CandKinResolution::Invalid:
364  throw cms::Exception("Invalid parametrization") << parametrization;
365  default:
366  throw cms::Exception("Not Implemented") << "diffToParameters not yet implemented for parametrization " << parametrization ;
367  }
368  return ret;
369 }
pat::helper::ParametrizationHelper::parametersFromP4
AlgebraicVector4 parametersFromP4(pat::CandKinResolution::Parametrization parametrization, const math::XYZTLorentzVector &p4)
Returns a vector of coordinates values given a coordinate frame and a 4-vector.
Definition: ParametrizationHelper.cc:278
stringResolutionProvider_cfi.parametrization
parametrization
specify parametrization (see SWGuidePATKinematicResolutions for more details)
Definition: stringResolutionProvider_cfi.py:6
p2
double p2[4]
Definition: TauolaWrapper.h:90
M_PI
#define M_PI
Definition: BXVectorInputProducer.cc:51
p1
double p1[4]
Definition: TauolaWrapper.h:89
AlgebraicVector4
ROOT::Math::SVector< double, 4 > AlgebraicVector4
Definition: AlgebraicROOTObjects.h:13
AlgebraicVector4 pat::helper::ParametrizationHelper::diffToParameters ( pat::CandKinResolution::Parametrization  parametrization,
const math::PtEtaPhiMLorentzVector &  p4ini,
const math::PtEtaPhiMLorentzVector &  p4fin 
)

Expresses the difference between two 4-momentum vectors as a shift in coordinates in a given frame.

Basically, if you do: pars = parametersFromP4(param, simp4); diff = diffToParameters(param, simP4, recP4); then up to roundoff errors recP4 == p4fromParameters(param, pars+diff, simP4);

Definition at line 285 of file ParametrizationHelper.cc.

References pat::CandKinResolution::Cart, diffToParameters(), pat::CandKinResolution::ECart, pat::CandKinResolution::EMomDev, pat::CandKinResolution::EScaledMomDev, pat::CandKinResolution::ESpher, pat::CandKinResolution::EtEtaPhi, pat::CandKinResolution::EtThetaPhi, Exception, pat::CandKinResolution::Invalid, M_PI, pat::CandKinResolution::MCCart, pat::CandKinResolution::MCMomDev, pat::CandKinResolution::MCPInvSpher, pat::CandKinResolution::MCSpher, pat::CandKinResolution::MomDev, parametersFromP4(), stringResolutionProvider_cfi::parametrization, and pat::CandKinResolution::Spher.

287 {
288  AlgebraicVector4 ret;
289  switch (parametrization) {
290  case pat::CandKinResolution::Cart:
291  case pat::CandKinResolution::ECart:
292  case pat::CandKinResolution::MCCart:
293  ret = parametersFromP4(parametrization,p4fin) - parametersFromP4(parametrization,p4ini);
294  break;
295  case pat::CandKinResolution::Spher:
296  case pat::CandKinResolution::ESpher:
297  case pat::CandKinResolution::MCSpher:
298  case pat::CandKinResolution::MCPInvSpher:
299  case pat::CandKinResolution::EtThetaPhi:
300  case pat::CandKinResolution::EtEtaPhi:
301  ret = parametersFromP4(parametrization,p4fin) - parametersFromP4(parametrization,p4ini);
302  while(ret[2] > +M_PI) ret[2] -= (2*M_PI);
303  while(ret[2] < -M_PI) ret[2] += (2*M_PI);
304  break;
305  case pat::CandKinResolution::MCMomDev:
306  case pat::CandKinResolution::MomDev:
307  case pat::CandKinResolution::EMomDev:
308  case pat::CandKinResolution::EScaledMomDev:
309  return diffToParameters(parametrization,
310  math::XYZTLorentzVector(p4ini),
311  math::XYZTLorentzVector(p4fin));
312  case pat::CandKinResolution::Invalid:
313  throw cms::Exception("Invalid parametrization") << parametrization;
314  default:
315  throw cms::Exception("Not Implemented") << "diffToParameters not yet implemented for parametrization " << parametrization ;
316  }
317  return ret;
318 }
pat::helper::ParametrizationHelper::parametersFromP4
AlgebraicVector4 parametersFromP4(pat::CandKinResolution::Parametrization parametrization, const math::XYZTLorentzVector &p4)
Returns a vector of coordinates values given a coordinate frame and a 4-vector.
Definition: ParametrizationHelper.cc:278
stringResolutionProvider_cfi.parametrization
parametrization
specify parametrization (see SWGuidePATKinematicResolutions for more details)
Definition: stringResolutionProvider_cfi.py:6
math::XYZTLorentzVector
XYZTLorentzVectorD XYZTLorentzVector
Lorentz vector with cylindrical internal representation using pseudorapidity.
Definition: LorentzVector.h:29
M_PI
#define M_PI
Definition: BXVectorInputProducer.cc:51
pat::helper::ParametrizationHelper::diffToParameters
AlgebraicVector4 diffToParameters(pat::CandKinResolution::Parametrization parametrization, const math::XYZTLorentzVector &p4ini, const math::XYZTLorentzVector &p4fin)
Expresses the difference between two 4-momentum vectors as a shift in coordinates in a given frame...
Definition: ParametrizationHelper.cc:322
AlgebraicVector4
ROOT::Math::SVector< double, 4 > AlgebraicVector4
Definition: AlgebraicROOTObjects.h:13
uint32_t pat::helper::ParametrizationHelper::dimension ( pat::CandKinResolution::Parametrization  parametrization)
inline

Returns the number of free parameters in a parametrization (3 or 4)

Definition at line 11 of file ParametrizationHelper.h.

References diffToParameters(), fromString(), isAlwaysMassive(), isAlwaysMassless(), isMassConstrained(), isPhysical(), name(), p4, p4fromParameters(), metProducer_cfi::parameters, parametersFromP4(), stringResolutionProvider_cfi::parametrization, polarP4fromParameters(), setParametersFromAnyVector(), setParametersFromP4(), and AlCaHLTBitMon_QueryRunRegistry::string.

Referenced by MillePedeAlignmentAlgorithm::callMille2D(), CosmicMuonSeedGenerator::createSeed(), SETSeedFinder::estimateMomentum(), BaseTrackerRecHit::localPositionErrorFast(), Trajectory::ndof(), reco::operator<<(), and SETSeedFinder::pre_prune().

11  {
12  return (static_cast<uint32_t>(parametrization) & 0x0F);
13  }
stringResolutionProvider_cfi.parametrization
parametrization
specify parametrization (see SWGuidePATKinematicResolutions for more details)
Definition: stringResolutionProvider_cfi.py:6
pat::CandKinResolution::Parametrization pat::helper::ParametrizationHelper::fromString ( const std::string &  name)

Convert a name into a parametrization code.

Definition at line 15 of file ParametrizationHelper.cc.

References pat::CandKinResolution::Cart, pat::CandKinResolution::ECart, pat::CandKinResolution::EMomDev, pat::CandKinResolution::EScaledMomDev, pat::CandKinResolution::ESpher, pat::CandKinResolution::EtEtaPhi, pat::CandKinResolution::EtThetaPhi, Exception, pat::CandKinResolution::MCCart, pat::CandKinResolution::MCMomDev, pat::CandKinResolution::MCPInvSpher, pat::CandKinResolution::MCSpher, pat::CandKinResolution::MomDev, and pat::CandKinResolution::Spher.

Referenced by dimension(), edm::ParameterSet::getPSetForUpdate(), and StringResolutionProvider::StringResolutionProvider().

15  {
16  using namespace std;
17 
18  typedef pat::CandKinResolution::Parametrization Parametrization;
19 
20  static map<string,Parametrization> const parMaps = {
21  {"Cart" , pat::CandKinResolution::Cart},
22  {"ECart" , pat::CandKinResolution::ECart},
23  {"MCCart" , pat::CandKinResolution::MCCart},
24  {"Spher" , pat::CandKinResolution::Spher},
25  {"ESpher" , pat::CandKinResolution::ESpher},
26  {"MCSpher" , pat::CandKinResolution::MCSpher},
27  {"MCPInvSpher" , pat::CandKinResolution::MCPInvSpher},
28  {"EtEtaPhi" , pat::CandKinResolution::EtEtaPhi},
29  {"EtThetaPhi" , pat::CandKinResolution::EtThetaPhi},
30  {"MomDev" , pat::CandKinResolution::MomDev},
31  {"EMomDev" , pat::CandKinResolution::EMomDev},
32  {"MCMomDev" , pat::CandKinResolution::MCMomDev},
33  {"EScaledMomDev" , pat::CandKinResolution::EScaledMomDev}
34  };
35  map<string,Parametrization>::const_iterator itP = parMaps.find(name);
36  if (itP == parMaps.end()) {
37  throw cms::Exception("StringResolutionProvider") << "Bad parametrization '" << name.c_str() << "'";
38  }
39  return itP->second;
40 }
bool pat::helper::ParametrizationHelper::isAlwaysMassive ( pat::CandKinResolution::Parametrization  parametrization)

Is this parametrization usable only with massive objects?

Definition at line 398 of file ParametrizationHelper.cc.

References pat::CandKinResolution::Cart, pat::CandKinResolution::ECart, pat::CandKinResolution::EMomDev, pat::CandKinResolution::EScaledMomDev, pat::CandKinResolution::ESpher, pat::CandKinResolution::EtEtaPhi, pat::CandKinResolution::EtThetaPhi, Exception, pat::CandKinResolution::Invalid, pat::CandKinResolution::MCCart, pat::CandKinResolution::MCMomDev, pat::CandKinResolution::MCPInvSpher, pat::CandKinResolution::MCSpher, pat::CandKinResolution::MomDev, stringResolutionProvider_cfi::parametrization, and pat::CandKinResolution::Spher.

Referenced by dimension().

399 {
400  switch (parametrization) {
401  case pat::CandKinResolution::Cart:
402  case pat::CandKinResolution::ECart:
403  case pat::CandKinResolution::MCCart:
404  case pat::CandKinResolution::Spher:
405  case pat::CandKinResolution::ESpher:
406  case pat::CandKinResolution::MCSpher:
407  case pat::CandKinResolution::MCPInvSpher:
408  case pat::CandKinResolution::MCMomDev:
409  case pat::CandKinResolution::EMomDev:
410  case pat::CandKinResolution::EScaledMomDev:
411  case pat::CandKinResolution::EtThetaPhi:
412  case pat::CandKinResolution::EtEtaPhi:
413  return false;
414  case pat::CandKinResolution::MomDev:
415  return true;
416  case pat::CandKinResolution::Invalid:
417  throw cms::Exception("Invalid parametrization") << parametrization;
418  default:
419  throw cms::Exception("Not Implemented") << "isAlwaysMassless not yet implemented for parametrization " << parametrization ;
420  }
421 }
stringResolutionProvider_cfi.parametrization
parametrization
specify parametrization (see SWGuidePATKinematicResolutions for more details)
Definition: stringResolutionProvider_cfi.py:6
bool pat::helper::ParametrizationHelper::isAlwaysMassless ( pat::CandKinResolution::Parametrization  parametrization)

Is this parametrization usable only with massless objects?

Definition at line 372 of file ParametrizationHelper.cc.

References pat::CandKinResolution::Cart, pat::CandKinResolution::ECart, pat::CandKinResolution::EMomDev, pat::CandKinResolution::EScaledMomDev, pat::CandKinResolution::ESpher, pat::CandKinResolution::EtEtaPhi, pat::CandKinResolution::EtThetaPhi, Exception, pat::CandKinResolution::Invalid, pat::CandKinResolution::MCCart, pat::CandKinResolution::MCMomDev, pat::CandKinResolution::MCPInvSpher, pat::CandKinResolution::MCSpher, pat::CandKinResolution::MomDev, stringResolutionProvider_cfi::parametrization, and pat::CandKinResolution::Spher.

Referenced by dimension().

373 {
374  switch (parametrization) {
375  case pat::CandKinResolution::Cart:
376  case pat::CandKinResolution::ECart:
377  case pat::CandKinResolution::MCCart:
378  case pat::CandKinResolution::Spher:
379  case pat::CandKinResolution::ESpher:
380  case pat::CandKinResolution::MCSpher:
381  case pat::CandKinResolution::MCPInvSpher:
382  case pat::CandKinResolution::MCMomDev:
383  case pat::CandKinResolution::MomDev:
384  case pat::CandKinResolution::EMomDev:
385  case pat::CandKinResolution::EScaledMomDev:
386  return false;
387  case pat::CandKinResolution::EtThetaPhi:
388  case pat::CandKinResolution::EtEtaPhi:
389  return true;
390  case pat::CandKinResolution::Invalid:
391  throw cms::Exception("Invalid parametrization") << parametrization;
392  default:
393  throw cms::Exception("Not Implemented") << "isAlwaysMassless not yet implemented for parametrization " << parametrization ;
394  }
395 }
stringResolutionProvider_cfi.parametrization
parametrization
specify parametrization (see SWGuidePATKinematicResolutions for more details)
Definition: stringResolutionProvider_cfi.py:6
bool pat::helper::ParametrizationHelper::isMassConstrained ( pat::CandKinResolution::Parametrization  parametrization)

If this parametrization has a mass constraint (including the 'isAlwaysMassless' case)

Definition at line 424 of file ParametrizationHelper.cc.

References pat::CandKinResolution::Cart, pat::CandKinResolution::ECart, pat::CandKinResolution::EMomDev, pat::CandKinResolution::EScaledMomDev, pat::CandKinResolution::ESpher, pat::CandKinResolution::EtEtaPhi, pat::CandKinResolution::EtThetaPhi, Exception, pat::CandKinResolution::Invalid, pat::CandKinResolution::MCCart, pat::CandKinResolution::MCMomDev, pat::CandKinResolution::MCPInvSpher, pat::CandKinResolution::MCSpher, pat::CandKinResolution::MomDev, stringResolutionProvider_cfi::parametrization, and pat::CandKinResolution::Spher.

Referenced by dimension().

425 {
426  switch (parametrization) {
427  case pat::CandKinResolution::Cart:
428  case pat::CandKinResolution::ECart:
429  case pat::CandKinResolution::Spher:
430  case pat::CandKinResolution::ESpher:
431  case pat::CandKinResolution::EMomDev:
432  case pat::CandKinResolution::EScaledMomDev:
433  case pat::CandKinResolution::EtThetaPhi:
434  case pat::CandKinResolution::EtEtaPhi:
435  case pat::CandKinResolution::MomDev:
436  return false;
437  case pat::CandKinResolution::MCCart:
438  case pat::CandKinResolution::MCSpher:
439  case pat::CandKinResolution::MCPInvSpher:
440  case pat::CandKinResolution::MCMomDev:
441  return true;
442  case pat::CandKinResolution::Invalid:
443  throw cms::Exception("Invalid parametrization") << parametrization;
444  default:
445  throw cms::Exception("Not Implemented") << "isAlwaysMassless not yet implemented for parametrization " << parametrization ;
446  }
447 }
stringResolutionProvider_cfi.parametrization
parametrization
specify parametrization (see SWGuidePATKinematicResolutions for more details)
Definition: stringResolutionProvider_cfi.py:6
bool pat::helper::ParametrizationHelper::isPhysical ( pat::CandKinResolution::Parametrization  parametrization,
const AlgebraicVector4 &  v4,
const math::PtEtaPhiMLorentzVector &  initialP4 
)

If this value of the parameters is meaningful in this parametrization. It can be used e.g. when doing random smearing to check you're still within the physical region This DOES check inequalities (e.g. E >= P, M >= 0, theta in [0,PI], ..) This DOES NOT check strict equalities (e.g. M == 0) This DOES NOT check that your parameters comply with your constraints (e.g. fixed mass constraint)

Definition at line 450 of file ParametrizationHelper.cc.

References pat::CandKinResolution::Cart, pat::CandKinResolution::ECart, pat::CandKinResolution::EMomDev, pat::CandKinResolution::EScaledMomDev, pat::CandKinResolution::ESpher, pat::CandKinResolution::EtEtaPhi, pat::CandKinResolution::EtThetaPhi, Exception, pat::CandKinResolution::Invalid, M_PI, pat::CandKinResolution::MCCart, pat::CandKinResolution::MCMomDev, pat::CandKinResolution::MCPInvSpher, pat::CandKinResolution::MCSpher, pat::CandKinResolution::MomDev, AlCaHLTBitMon_ParallelJobs::p, stringResolutionProvider_cfi::parametrization, and pat::CandKinResolution::Spher.

Referenced by dimension().

452  {
453  switch (parametrization) {
454  // ======= CARTESIAN ==========
455  case pat::CandKinResolution::Cart:
456  return parameters[3] >= 0; // M >= 0
457  case pat::CandKinResolution::MCCart:
458  return true;
459  case pat::CandKinResolution::ECart:
460  return (parameters[0]*parameters[0] + parameters[1]*parameters[1] + parameters[2]*parameters[2] <= parameters[3]*parameters[3]); // E >= P
461  case pat::CandKinResolution::Spher:
462  return (parameters[0] >= 0 ) && // P >= 0
463  (parameters[3] >= 0 ) && // M >= 0
464  (parameters[1] >= 0 ) && // theta >= 0
465  (parameters[1] <= M_PI); // theta <= pi
466  case pat::CandKinResolution::MCSpher:
467  return (parameters[0] >= 0 ) && // P >= 0
468  (parameters[1] >= 0 ) && // theta >= 0
469  (parameters[1] <= M_PI); // theta <= pi
470  case pat::CandKinResolution::ESpher: //
471  return (parameters[0] >= 0 ) && // P >= 0
472  (parameters[3] >= parameters[0]) && // E >= P
473  (parameters[1] >= 0 ) && // theta >= 0
474  (parameters[1] <= M_PI ) ; // theta <= PI
475  case pat::CandKinResolution::MCPInvSpher: //
476  return (parameters[0] > 0 ) && // 1/P > 0
477  (parameters[1] >= 0 ) && // theta >= 0
478  (parameters[1] <= M_PI); // theta <= pi
479  // ======= HEP CYLINDRICAL ==========
480  case pat::CandKinResolution::EtThetaPhi:
481  return (parameters[0] > 0 ) && // Et >= 0
482  (parameters[1] >= 0 ) && // theta >= 0
483  (parameters[1] <= M_PI); // theta <= pi
484  case pat::CandKinResolution::EtEtaPhi: // as simple as that
485  return (parameters[0] > 0); // Et >= 0
486  // ======= MomentumDeviates ==========
487  case pat::CandKinResolution::MomDev:
488  return (parameters[0] >= 0) && // P >= 0
489  (parameters[3] >= 0); // m/M0 >= 0
490  case pat::CandKinResolution::MCMomDev:
491  return (parameters[0] >= 0); // P >= 0
492  case pat::CandKinResolution::EMomDev:
493  case pat::CandKinResolution::EScaledMomDev:
494  {
495  if (parameters[0] <= 0) return false;
496  ROOT::Math::DisplacementVector3D< ROOT::Math::Cartesian3D<double> > p = initialP4.Vect(), uz(0,0,1), uph, uth;
497  uph = uz.Cross(p).Unit();
498  uth = p.Cross(uph).Unit();
499  p *= parameters[0];
500  p += uth * parameters[1] + uph * parameters[2];
501  if (parametrization == pat::CandKinResolution::EMomDev) {
502  if (parameters[3] < 0) return false;
503  double m2 = ROOT::Math::Square(parameters[3] * initialP4.energy()) - p.Mag2();
504  if (m2 < 0) return false;
505  } else if (parametrization == pat::CandKinResolution::EScaledMomDev) {
506  if (parameters[3] < 0) return false;
507  double m2 = ROOT::Math::Square(p.R()*initialP4.E()/initialP4.P()) - p.Mag2();
508  if (m2 < 0) return false;
509  }
510  return true;
511  }
512  // ======= OTHER ==========
513  case pat::CandKinResolution::Invalid:
514  throw cms::Exception("Invalid parametrization") << parametrization;
515  default:
516  throw cms::Exception("Not Implemented") << "getResolEta not yet implemented for parametrization " << parametrization ;
517  }
518 }
AlCaHLTBitMon_ParallelJobs.p
p
Definition: AlCaHLTBitMon_ParallelJobs.py:152
metProducer_cfi.parameters
parameters
Definition: metProducer_cfi.py:59
stringResolutionProvider_cfi.parametrization
parametrization
specify parametrization (see SWGuidePATKinematicResolutions for more details)
Definition: stringResolutionProvider_cfi.py:6
M_PI
#define M_PI
Definition: BXVectorInputProducer.cc:51
const char * pat::helper::ParametrizationHelper::name ( pat::CandKinResolution::Parametrization  param)

Convert a number into a string.

Definition at line 43 of file ParametrizationHelper.cc.

References pat::CandKinResolution::Cart, pat::CandKinResolution::ECart, pat::CandKinResolution::EMomDev, pat::CandKinResolution::EScaledMomDev, pat::CandKinResolution::ESpher, pat::CandKinResolution::EtEtaPhi, pat::CandKinResolution::EtThetaPhi, pat::CandKinResolution::Invalid, pat::CandKinResolution::MCCart, pat::CandKinResolution::MCMomDev, pat::CandKinResolution::MCPInvSpher, pat::CandKinResolution::MCSpher, pat::CandKinResolution::MomDev, and pat::CandKinResolution::Spher.

Referenced by dimension().

43  {
44  switch (param) {
45  case pat::CandKinResolution::Cart: return "Cart";
46  case pat::CandKinResolution::ECart: return "ECart";
47  case pat::CandKinResolution::MCCart: return "MCCart";
48  case pat::CandKinResolution::Spher: return "Spher";
49  case pat::CandKinResolution::ESpher: return "ESpher";
50  case pat::CandKinResolution::MCSpher: return "MCSpher";
51  case pat::CandKinResolution::MCPInvSpher: return "MCPInvSpher";
52  case pat::CandKinResolution::EtEtaPhi: return "EtEtaPhi";
53  case pat::CandKinResolution::EtThetaPhi: return "EtThetaPhi";
54  case pat::CandKinResolution::MomDev: return "MomDev";
55  case pat::CandKinResolution::EMomDev: return "EMomDev";
56  case pat::CandKinResolution::MCMomDev: return "MCMomDev";
57  case pat::CandKinResolution::EScaledMomDev: return "EScaledMomDev";
58  case pat::CandKinResolution::Invalid: return "Invalid";
59  default: return "UNKNOWN";
60  }
61 }
math::XYZTLorentzVector pat::helper::ParametrizationHelper::p4fromParameters ( pat::CandKinResolution::Parametrization  parametrization,
const AlgebraicVector4 &  parameters,
const math::XYZTLorentzVector &  initialP4 
)

Given a choice of coordinate frame, a vector of coordinates and a reference 4-vector, produce a new 4 vector with the specified parameters. The new 4-vector is not guaranteed to satisfy the constraints of these parametrization if the initial 4-vector does not satisfy them. In the future this method will throw an exception if you go in an unphysical point of the coordinate system (e.g. E^2 < P^2)

Definition at line 151 of file ParametrizationHelper.cc.

References pat::CandKinResolution::Cart, pat::CandKinResolution::ECart, pat::CandKinResolution::EMomDev, pat::CandKinResolution::EScaledMomDev, pat::CandKinResolution::MCCart, pat::CandKinResolution::MCMomDev, pat::CandKinResolution::MomDev, AlCaHLTBitMon_ParallelJobs::p, polarP4fromParameters(), and mathSSE::sqrt().

Referenced by dimension().

153  {
154  math::XYZTLorentzVector ret;
155  switch (parametrization) {
156  // ======= CARTESIAN ==========
157  case pat::CandKinResolution::Cart:
158  ret.SetCoordinates(parameters[0], parameters[1], parameters[2],
159  sqrt(parameters[0]*parameters[0] +
160  parameters[1]*parameters[1] +
161  parameters[2]*parameters[2] +
162  parameters[3]*parameters[3]) );
163  break;
164  case pat::CandKinResolution::MCCart: // same as above
165  ret.SetCoordinates(parameters[0], parameters[1], parameters[2],
166  sqrt(parameters[0]*parameters[0] +
167  parameters[1]*parameters[1] +
168  parameters[2]*parameters[2] +
169  initialP4.mass()*initialP4.mass()) );
170  break;
171  case pat::CandKinResolution::ECart:
172  ret.SetCoordinates(parameters[0], parameters[1], parameters[2], parameters[3]);
173  break;
174  // ======= MomentumDeviates ==========
175  case pat::CandKinResolution::MomDev:
176  case pat::CandKinResolution::EMomDev:
177  case pat::CandKinResolution::MCMomDev:
178  case pat::CandKinResolution::EScaledMomDev:
179  {
180  ROOT::Math::DisplacementVector3D< ROOT::Math::Cartesian3D<double> > p = initialP4.Vect(), uz(0,0,1), uph, uth;
181  uph = uz.Cross(p).Unit();
182  uth = p.Cross(uph).Unit();
183  p *= parameters[0];
184  p += uth * parameters[1] + uph * parameters[2];
185  if (parametrization == pat::CandKinResolution::MomDev) {
186  ret.SetCoordinates(p.X(), p.Y(), p.Z(), sqrt(p.Mag2() + ROOT::Math::Square(initialP4.mass() * parameters[3])) );
187  } else if (parametrization == pat::CandKinResolution::EMomDev) {
188  ret.SetCoordinates(p.X(), p.Y(), p.Z(), parameters[3] * initialP4.energy());
189  } else if (parametrization == pat::CandKinResolution::EMomDev) {
190  ret.SetCoordinates(p.X(), p.Y(), p.Z(), p.R() * initialP4.E()/initialP4.P());
191  } else {
192  ret.SetCoordinates(p.X(), p.Y(), p.Z(), sqrt(p.Mag2() + initialP4.mass()*initialP4.mass()));
193  }
194  break;
195  }
196  // ======= ALL OTHERS ==========
197  default:
198  ret = polarP4fromParameters(parametrization, parameters, math::PtEtaPhiMLorentzVector(initialP4));
199  }
200  return ret;
201 }
AlCaHLTBitMon_ParallelJobs.p
p
Definition: AlCaHLTBitMon_ParallelJobs.py:152
metProducer_cfi.parameters
parameters
Definition: metProducer_cfi.py:59
math::PtEtaPhiMLorentzVector
PtEtaPhiMLorentzVectorD PtEtaPhiMLorentzVector
Lorentz vector with cartesian internal representation.
Definition: LorentzVector.h:25
stringResolutionProvider_cfi.parametrization
parametrization
specify parametrization (see SWGuidePATKinematicResolutions for more details)
Definition: stringResolutionProvider_cfi.py:6
math::XYZTLorentzVector
XYZTLorentzVectorD XYZTLorentzVector
Lorentz vector with cylindrical internal representation using pseudorapidity.
Definition: LorentzVector.h:29
mathSSE::sqrt
T sqrt(T t)
Definition: SSEVec.h:18
pat::helper::ParametrizationHelper::polarP4fromParameters
math::PtEtaPhiMLorentzVector polarP4fromParameters(pat::CandKinResolution::Parametrization parametrization, const AlgebraicVector4 &parameters, const math::PtEtaPhiMLorentzVector &initialP4)
Definition: ParametrizationHelper.cc:64
AlgebraicVector4 pat::helper::ParametrizationHelper::parametersFromP4 ( pat::CandKinResolution::Parametrization  parametrization,
const math::XYZTLorentzVector &  p4 
)

Returns a vector of coordinates values given a coordinate frame and a 4-vector.

Definition at line 278 of file ParametrizationHelper.cc.

References setParametersFromP4().

Referenced by diffToParameters(), and dimension().

278  {
279  AlgebraicVector4 ret;
280  setParametersFromP4(parametrization, ret, p4);
281  return ret;
282 }
stringResolutionProvider_cfi.parametrization
parametrization
specify parametrization (see SWGuidePATKinematicResolutions for more details)
Definition: stringResolutionProvider_cfi.py:6
p4
double p4[4]
Definition: TauolaWrapper.h:92
pat::helper::ParametrizationHelper::setParametersFromP4
void setParametersFromP4(pat::CandKinResolution::Parametrization parametrization, AlgebraicVector4 &pars, const math::XYZTLorentzVector &p4)
Set the values of the parameters for a given 4-momentum.
Definition: ParametrizationHelper.cc:265
AlgebraicVector4
ROOT::Math::SVector< double, 4 > AlgebraicVector4
Definition: AlgebraicROOTObjects.h:13
AlgebraicVector4 pat::helper::ParametrizationHelper::parametersFromP4 ( pat::CandKinResolution::Parametrization  parametrization,
const math::PtEtaPhiMLorentzVector &  p4 
)

Returns a vector of coordinates values given a coordinate frame and a 4-vector.

Definition at line 271 of file ParametrizationHelper.cc.

References setParametersFromP4().

271  {
272  AlgebraicVector4 ret;
273  setParametersFromP4(parametrization, ret, p4);
274  return ret;
275 }
stringResolutionProvider_cfi.parametrization
parametrization
specify parametrization (see SWGuidePATKinematicResolutions for more details)
Definition: stringResolutionProvider_cfi.py:6
p4
double p4[4]
Definition: TauolaWrapper.h:92
pat::helper::ParametrizationHelper::setParametersFromP4
void setParametersFromP4(pat::CandKinResolution::Parametrization parametrization, AlgebraicVector4 &pars, const math::XYZTLorentzVector &p4)
Set the values of the parameters for a given 4-momentum.
Definition: ParametrizationHelper.cc:265
AlgebraicVector4
ROOT::Math::SVector< double, 4 > AlgebraicVector4
Definition: AlgebraicROOTObjects.h:13
math::PtEtaPhiMLorentzVector pat::helper::ParametrizationHelper::polarP4fromParameters ( pat::CandKinResolution::Parametrization  parametrization,
const AlgebraicVector4 &  parameters,
const math::PtEtaPhiMLorentzVector &  initialP4 
)

Given a choice of coordinate frame, a vector of coordinates and a reference 4-vector, produce a new 4 vector with the specified parameters. The new 4-vector is not guaranteed to satisfy the constraints of these parametrization if the initial 4-vector does not satisfy them. In the future this method will throw an exception if you go in an unphysical point of the coordinate system (e.g. E^2 < P^2)

Definition at line 64 of file ParametrizationHelper.cc.

References pat::CandKinResolution::Cart, pat::CandKinResolution::ECart, pat::CandKinResolution::EMomDev, pat::CandKinResolution::EScaledMomDev, pat::CandKinResolution::ESpher, pat::CandKinResolution::EtEtaPhi, pat::CandKinResolution::EtThetaPhi, Exception, pat::CandKinResolution::Invalid, pat::CandKinResolution::MCCart, pat::CandKinResolution::MCMomDev, pat::CandKinResolution::MCPInvSpher, pat::CandKinResolution::MCSpher, pat::CandKinResolution::MomDev, AlCaHLTBitMon_ParallelJobs::p, stringResolutionProvider_cfi::parametrization, pat::CandKinResolution::Spher, and mathSSE::sqrt().

Referenced by dimension(), and p4fromParameters().

66  {
67  math::PtEtaPhiMLorentzVector ret;
68  ROOT::Math::CylindricalEta3D<double> converter;
69  double m2;
70  switch (parametrization) {
71  // ======= CARTESIAN ==========
72  case pat::CandKinResolution::Cart:
73  ret = math::XYZTLorentzVector(parameters[0], parameters[1], parameters[2],
74  sqrt(parameters[0]*parameters[0] +
75  parameters[1]*parameters[1] +
76  parameters[2]*parameters[2] +
77  parameters[3]*parameters[3]) );
78  ret.SetM(parameters[3]); // to be sure about roundoffs
79  break;
80  case pat::CandKinResolution::MCCart:
81  ret = math::XYZTLorentzVector(parameters[0], parameters[1], parameters[2],
82  sqrt(parameters[0]*parameters[0] +
83  parameters[1]*parameters[1] +
84  parameters[2]*parameters[2] +
85  initialP4.mass()*initialP4.mass()) );
86  ret.SetM(initialP4.mass()); // to be sure about roundoffs
87  break;
88  case pat::CandKinResolution::ECart:
89  ret = math::XYZTLorentzVector(parameters[0], parameters[1], parameters[2], parameters[3]);
90  break;
91  // ======= SPHERICAL ==========
92  case pat::CandKinResolution::Spher:
93  converter = ROOT::Math::Polar3D<double>(parameters[0], parameters[1], 0);
94  ret.SetCoordinates(converter.Rho(),converter.Eta(),parameters[2],parameters[3]);
95  break;
96  case pat::CandKinResolution::MCSpher: // same as above
97  converter = ROOT::Math::Polar3D<double>(parameters[0], parameters[1], 0);
98  ret.SetCoordinates(converter.Rho(),converter.Eta(),parameters[2],initialP4.mass());
99  break;
100  case pat::CandKinResolution::ESpher: //
101  converter = ROOT::Math::Polar3D<double>(parameters[0], parameters[1], 0);
102  m2 = - parameters[0]*parameters[0] + parameters[3]*parameters[3];
103  ret.SetCoordinates(converter.Rho(),converter.Eta(),parameters[2],(m2 > 0 ? sqrt(m2) : 0.0));
104  break;
105  case pat::CandKinResolution::MCPInvSpher: //
106  converter = ROOT::Math::Polar3D<double>(1.0/parameters[0], parameters[1], 0);
107  ret.SetCoordinates(converter.Rho(),converter.Eta(),parameters[2],initialP4.mass());
108  break;
109  // ======= HEP CYLINDRICAL ==========
110  case pat::CandKinResolution::EtThetaPhi:
111  converter = ROOT::Math::Polar3D<double>(1.0, parameters[1], 0);
112  ret.SetCoordinates(parameters[0],converter.Eta(),parameters[2],0);
113  break;
114  case pat::CandKinResolution::EtEtaPhi: // as simple as that
115  ret.SetCoordinates(parameters[0], parameters[1], parameters[2], 0);
116  break;
117  // ======= MomentumDeviates ==========
118  case pat::CandKinResolution::MomDev:
119  case pat::CandKinResolution::EMomDev:
120  case pat::CandKinResolution::MCMomDev:
121  case pat::CandKinResolution::EScaledMomDev:
122  {
123  ROOT::Math::DisplacementVector3D< ROOT::Math::Cartesian3D<double> > p = initialP4.Vect(), uz(0,0,1), uph, uth;
124  uph = uz.Cross(p).Unit();
125  uth = p.Cross(uph).Unit();
126  p *= parameters[0];
127  p += uth * parameters[1] + uph * parameters[2];
128  if (parametrization == pat::CandKinResolution::MomDev) {
129  ret.SetCoordinates(p.Rho(), p.Eta(), p.Phi(), initialP4.mass() * parameters[3]);
130  } else if (parametrization == pat::CandKinResolution::EMomDev) {
131  double m2 = ROOT::Math::Square(parameters[3] * initialP4.energy()) - p.Mag2();
132  ret.SetCoordinates(p.Rho(), p.Eta(), p.Phi(), (m2 > 0 ? sqrt(m2) : 0.0));
133  } else if (parametrization == pat::CandKinResolution::EScaledMomDev) {
134  double m2 = ROOT::Math::Square(p.R()*initialP4.E()/initialP4.P()) - p.Mag2();
135  ret.SetCoordinates(p.Rho(), p.Eta(), p.Phi(), (m2 > 0 ? sqrt(m2) : 0.0));
136  } else if (parametrization == pat::CandKinResolution::MCMomDev) {
137  ret.SetCoordinates(p.Rho(), p.Eta(), p.Phi(), initialP4.mass());
138  }
139  break;
140  }
141  // ======= OTHER ==========
142  case pat::CandKinResolution::Invalid:
143  throw cms::Exception("Invalid parametrization") << parametrization;
144  default:
145  throw cms::Exception("Not Implemented") << "getResolEta not yet implemented for parametrization " << parametrization ;
146  }
147  return ret;
148 }
AlCaHLTBitMon_ParallelJobs.p
p
Definition: AlCaHLTBitMon_ParallelJobs.py:152
metProducer_cfi.parameters
parameters
Definition: metProducer_cfi.py:59
math::PtEtaPhiMLorentzVector
PtEtaPhiMLorentzVectorD PtEtaPhiMLorentzVector
Lorentz vector with cartesian internal representation.
Definition: LorentzVector.h:25
stringResolutionProvider_cfi.parametrization
parametrization
specify parametrization (see SWGuidePATKinematicResolutions for more details)
Definition: stringResolutionProvider_cfi.py:6
math::XYZTLorentzVector
XYZTLorentzVectorD XYZTLorentzVector
Lorentz vector with cylindrical internal representation using pseudorapidity.
Definition: LorentzVector.h:29
mathSSE::sqrt
T sqrt(T t)
Definition: SSEVec.h:18
template<typename T >
void pat::helper::ParametrizationHelper::setParametersFromAnyVector ( pat::CandKinResolution::Parametrization  parametrization,
AlgebraicVector4 &  pars,
const T &  p4 
)

For internal use only, so we provide only the interface. Use the 'setParametersFromP4'.

Definition at line 205 of file ParametrizationHelper.cc.

References pat::CandKinResolution::Cart, pat::CandKinResolution::ECart, pat::CandKinResolution::EMomDev, pat::CandKinResolution::EScaledMomDev, pat::CandKinResolution::ESpher, pat::CandKinResolution::EtEtaPhi, pat::CandKinResolution::EtThetaPhi, Exception, pat::CandKinResolution::Invalid, pat::CandKinResolution::MCCart, pat::CandKinResolution::MCMomDev, pat::CandKinResolution::MCPInvSpher, pat::CandKinResolution::MCSpher, pat::CandKinResolution::MomDev, stringResolutionProvider_cfi::parametrization, and pat::CandKinResolution::Spher.

Referenced by dimension(), and setParametersFromP4().

207  {
208  switch (parametrization) {
209  // ======= CARTESIAN ==========
210  case pat::CandKinResolution::Cart:
211  ret[0] = p4.px(); ret[1] = p4.py(); ret[2] = p4.pz(); ret[3] = p4.mass();
212  break;
213  case pat::CandKinResolution::MCCart:
214  ret[0] = p4.px(); ret[1] = p4.py(); ret[2] = p4.pz(); ret[3] = p4.mass();
215  break;
216  case pat::CandKinResolution::ECart:
217  ret[0] = p4.px(); ret[1] = p4.py(); ret[2] = p4.pz(); ret[3] = p4.energy();
218  break;
219  // ======= SPHERICAL ==========
220  case pat::CandKinResolution::Spher:
221  ret[0] = p4.P(); ret[1] = p4.theta(); ret[2] = p4.phi(); ret[3] = p4.mass();
222  break;
223  case pat::CandKinResolution::MCSpher:
224  ret[0] = p4.P(); ret[1] = p4.theta(); ret[2] = p4.phi(); ret[3] = p4.mass();
225  break;
226  case pat::CandKinResolution::ESpher:
227  ret[0] = p4.P(); ret[1] = p4.theta(); ret[2] = p4.phi(); ret[3] = p4.energy();
228  break;
229  case pat::CandKinResolution::MCPInvSpher:
230  ret[0] = 1.0/p4.P(); ret[1] = p4.theta(); ret[2] = p4.phi(); ret[3] = p4.mass();
231  break;
232  // ======= HEP CYLINDRICAL ==========
233  case pat::CandKinResolution::EtThetaPhi:
234  ret[0] = p4.pt(); ret[1] = p4.theta(); ret[2] = p4.phi(); ret[3] = 0;
235  break;
236  case pat::CandKinResolution::EtEtaPhi:
237  ret[0] = p4.pt(); ret[1] = p4.eta(); ret[2] = p4.phi(); ret[3] = 0;
238  break;
239  // ======= DEVIATES ==========
240  case pat::CandKinResolution::MomDev:
241  case pat::CandKinResolution::EMomDev:
242  ret[0] = 1.0; ret[1] = 0.0; ret[2] = 0.0; ret[3] = 1.0;
243  break;
244  case pat::CandKinResolution::MCMomDev:
245  ret[0] = 1.0; ret[1] = 0.0; ret[2] = 0.0; ret[3] = p4.mass();
246  break;
247  case pat::CandKinResolution::EScaledMomDev:
248  ret[0] = 1.0; ret[1] = 0.0; ret[2] = 0.0; ret[3] = p4.E()/p4.P();
249  break;
250  // ======= OTHER ==========
251  case pat::CandKinResolution::Invalid:
252  throw cms::Exception("Invalid parametrization") << parametrization;
253  default:
254  throw cms::Exception("Not Implemented") << "getResolEta not yet implemented for parametrization " << parametrization ;
255  }
256 }
stringResolutionProvider_cfi.parametrization
parametrization
specify parametrization (see SWGuidePATKinematicResolutions for more details)
Definition: stringResolutionProvider_cfi.py:6
p4
double p4[4]
Definition: TauolaWrapper.h:92
void pat::helper::ParametrizationHelper::setParametersFromP4 ( pat::CandKinResolution::Parametrization  parametrization,
AlgebraicVector4 &  pars,
const math::XYZTLorentzVector &  p4 
)

Set the values of the parameters for a given 4-momentum.

Definition at line 265 of file ParametrizationHelper.cc.

References setParametersFromAnyVector().

Referenced by dimension(), and parametersFromP4().

266  {
267  setParametersFromAnyVector(parametrization, v, p4);
268 }
stringResolutionProvider_cfi.parametrization
parametrization
specify parametrization (see SWGuidePATKinematicResolutions for more details)
Definition: stringResolutionProvider_cfi.py:6
p4
double p4[4]
Definition: TauolaWrapper.h:92
pat::helper::ParametrizationHelper::setParametersFromAnyVector
void setParametersFromAnyVector(pat::CandKinResolution::Parametrization parametrization, AlgebraicVector4 &pars, const T &p4)
For internal use only, so we provide only the interface. Use the &#39;setParametersFromP4&#39;.
Definition: ParametrizationHelper.cc:205
void pat::helper::ParametrizationHelper::setParametersFromP4 ( pat::CandKinResolution::Parametrization  parametrization,
AlgebraicVector4 &  pars,
const math::PtEtaPhiMLorentzVector &  p4 
)

Set the values of the parameters for a given 4-momentum.

Definition at line 259 of file ParametrizationHelper.cc.

References setParametersFromAnyVector().

260  {
261  setParametersFromAnyVector(parametrization, v, p4);
262 }
stringResolutionProvider_cfi.parametrization
parametrization
specify parametrization (see SWGuidePATKinematicResolutions for more details)
Definition: stringResolutionProvider_cfi.py:6
p4
double p4[4]
Definition: TauolaWrapper.h:92
pat::helper::ParametrizationHelper::setParametersFromAnyVector
void setParametersFromAnyVector(pat::CandKinResolution::Parametrization parametrization, AlgebraicVector4 &pars, const T &p4)
For internal use only, so we provide only the interface. Use the &#39;setParametersFromP4&#39;.
Definition: ParametrizationHelper.cc:205
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