FourMomentum Class Reference

#include <Vector4.hh>

Inheritance diagram for FourMomentum:

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List of all members.

Detailed Description

Specialized version of the FourVector with momentum/energy functionality.

Definition at line 308 of file Vector4.hh.


Public Member Functions

 FourMomentum ()
template<typename V4>
 FourMomentum (const V4 &other)
 FourMomentum (const Vector< 4 > &other)
 FourMomentum (const double E, const double px, const double py, const double pz)
 ~FourMomentum ()
double E () const
 Get energy $ E $ (time component of momentum).
Vector3 p () const
 Get 3-momentum part, $ p $.
double px () const
 Get x-component of momentum $ p_x $.
double py () const
 Get y-component of momentum $ p_y $.
double pz () const
 Get z-component of momentum $ p_z $.
FourMomentum & setE (double E)
 Set energy $ E $ (time component of momentum).
FourMomentum & setPx (double px)
 Set x-component of momentum $ p_x $.
FourMomentum & setPy (double py)
 Set y-component of momentum $ p_y $.
FourMomentum & setPz (double pz)
 Set z-component of momentum $ p_z $.
double mass2 () const
 Get squared mass $ m^2 = E^2 - p^2 $ (the Lorentz self-invariant).
double mass () const
 Get mass $ m = \sqrt{E^2 - p^2} $ (the Lorentz self-invariant).
double rapidity () const
 Calculate rapidity.
double pT2 () const
 Calculate squared transverse momentum $ p_T^2 $.
double pT () const
 Calculate transverse momentum $ p_T $.
double Et2 () const
 Calculate transverse energy $ E_T^2 = E^2 \sin^2{\theta} $.
double Et () const
 Calculate transverse energy $ E_T = E \sin{\theta} $.
Vector3 boostVector () const
 Calculate boost vector (in units of $ \beta $).
double t () const
double x () const
double y () const
double z () const
FourVector & setT (const double t)
FourVector & setX (const double x)
FourVector & setY (const double y)
FourVector & setZ (const double z)
double invariant () const
double angle (const FourVector &v) const
double angle (const Vector3 &v3) const
double polarRadius2 () const
double perp2 () const
 Synonym for polarRadius2.
double rho2 () const
 Synonym for polarRadius2.
double polarRadius () const
double perp () const
 Synonym for polarRadius.
double rho () const
 Synonym for polarRadius.
double azimuthalAngle (const PhiMapping mapping=ZERO_2PI) const
 Angle subtended by the 3-vector's projection in x-y and the x-axis.
double phi (const PhiMapping mapping=ZERO_2PI) const
 Synonym for azimuthalAngle.
double polarAngle () const
 Angle subtended by the 3-vector and the z-axis.
double theta () const
 Synonym for polarAngle.
double pseudorapidity () const
double eta () const
 Synonym for pseudorapidity.
Vector3 vector3 () const
 Get the spatial part of the 4-vector as a 3-vector.
double contract (const FourVector &v) const
 Contract two 4-vectors, with metric signature (+ - - -).
double dot (const FourVector &v) const
 Contract two 4-vectors, with metric signature (+ - - -).
double operator* (const FourVector &v) const
 Contract two 4-vectors, with metric signature (+ - - -).
FourVector & operator*= (double a)
 Multiply by a scalar.
FourVector & operator/= (double a)
 Divide by a scalar.
FourVector & operator+= (const FourVector &v)
FourVector & operator-= (const FourVector &v)
FourVector operator- () const
 Invert the vector.
const double & get (const size_t index) const
const double & operator[] (const size_t index) const
 Direct access to vector elements by index.
double & operator[] (const size_t index)
 Direct access to vector elements by index.
Vector< N > & set (const size_t index, const double value)
 Set indexed value.
size_t size () const
 Vector dimensionality.
bool isZero (double tolerance=1E-5) const
 Check for nullness, allowing for numerical precision.
double mod2 () const
 Calculate the modulus-squared of a vector. $ \sum_{i=1}^N x_i^2 $.
double mod () const
 Calculate the modulus of a vector. $ \sqrt{\sum_{i=1}^N x_i^2} $.
bool operator== (const Vector< N > &a) const
bool operator!= (const Vector< N > &a) const
bool operator< (const Vector< N > &a) const
bool operator<= (const Vector< N > &a) const
bool operator> (const Vector< N > &a) const
bool operator>= (const Vector< N > &a) const

Protected Member Functions

double & get (const size_t index)

Protected Attributes

Eigen::Vector< double, N > _vec
 Vector.

Classes

struct  byEAscending
 struct for sorting by increasing energy More...
struct  byEDescending
 struct for sorting by decreasing energy More...

Constructor & Destructor Documentation

FourMomentum (  )  [inline]

Definition at line 310 of file Vector4.hh.

00310 { }

FourMomentum ( const V4 &  other  )  [inline]

Definition at line 313 of file Vector4.hh.

References FourMomentum::setE(), FourMomentum::setPx(), FourMomentum::setPy(), and FourMomentum::setPz().

00313                                   {
00314       this->setE(other.t());
00315       this->setPx(other.x());
00316       this->setPy(other.y());
00317       this->setPz(other.z());
00318     }

FourMomentum ( const Vector< 4 > &  other  )  [inline]

Definition at line 320 of file Vector4.hh.

00321       : FourVector(other) { }

FourMomentum ( const double  E,
const double  px,
const double  py,
const double  pz 
) [inline]

Definition at line 323 of file Vector4.hh.

References FourMomentum::setE(), FourMomentum::setPx(), FourMomentum::setPy(), and FourMomentum::setPz().

00323                                                                                     {
00324       this->setE(E);
00325       this->setPx(px);
00326       this->setPy(py);
00327       this->setPz(pz);
00328     }

~FourMomentum (  )  [inline]

Definition at line 330 of file Vector4.hh.

00330 {}

Member Function Documentation

double E (  )  const [inline]

Get energy $ E $ (time component of momentum).

Definition at line 334 of file Vector4.hh.

References FourVector::t().

Referenced by CDF_1997_S3541940::_avg_beam_in_lab(), CDF_1996_S3349578::_avg_beam_in_lab(), CDF_1996_S3349578::_fiveJetAnalysis(), D0_1996_S3214044::_fourJetAnalysis(), CDF_1996_S3349578::_fourJetAnalysis(), D0_1996_S3214044::_threeJetAnalysis(), CDF_1996_S3349578::_threeJetAnalysis(), OPAL_1998_S3780481::analyze(), MC_PHOTONJETS::analyze(), H1_2000_S4129130::analyze(), H1_1994_S2919893::analyze(), D0_2010_S8570965::analyze(), D0_2008_S7719523::analyze(), D0_2006_S6438750::analyze(), CDF_1997_S3541940::analyze(), ALEPH_1996_S3486095::analyze(), ALEPH_1996_S3196992::analyze(), FourMomentum::boostVector(), FastJets::calc(), Rivet::cmpMomByAscE(), Rivet::cmpMomByE(), Rivet::cmpParticleByAscE(), Rivet::cmpParticleByE(), FourMomentum::Et(), FourMomentum::byEAscending::operator()(), ParticleBase::byEAscending::operator()(), ALEPH_1996_S3196992::particleInJet(), Hemispheres::project(), FourMomentum::rapidity(), and Rivet::sqrtS().

00334 { return t(); }

Vector3 p (  )  const [inline]

Get 3-momentum part, $ p $.

Definition at line 337 of file Vector4.hh.

References FourVector::vector3().

00337 { return vector3(); }

double px (  )  const [inline]

Get x-component of momentum $ p_x $.

Definition at line 340 of file Vector4.hh.

References FourVector::x().

Referenced by CDF_2008_S7541902::analyze(), FourMomentum::boostVector(), FastJets::calc(), Rivet::get2dDecayLength(), Rivet::get3dDecayLength(), and DISKinematics::project().

00340 { return x(); }

double py (  )  const [inline]

Get y-component of momentum $ p_y $.

Definition at line 343 of file Vector4.hh.

References FourVector::y().

Referenced by CDF_2008_S7541902::analyze(), FourMomentum::boostVector(), FastJets::calc(), Rivet::get2dDecayLength(), and Rivet::get3dDecayLength().

00343 { return y(); }

double pz (  )  const [inline]

Get z-component of momentum $ p_z $.

Definition at line 346 of file Vector4.hh.

References FourVector::z().

Referenced by SFM_1984_S1178091::analyze(), FourMomentum::boostVector(), FastJets::calc(), Rivet::get3dDecayLength(), DISLepton::project(), FourMomentum::rapidity(), and Rivet::sqrtS().

00346 { return z(); }

FourMomentum& setE ( double  E  )  [inline]

Set energy $ E $ (time component of momentum).

Definition at line 349 of file Vector4.hh.

References FourVector::setT().

Referenced by FourMomentum::FourMomentum().

00349 { setT(E); return *this; }

FourMomentum& setPx ( double  px  )  [inline]

Set x-component of momentum $ p_x $.

Definition at line 352 of file Vector4.hh.

References FourVector::setX().

Referenced by FourMomentum::FourMomentum().

00352 { setX(px); return *this; }

FourMomentum& setPy ( double  py  )  [inline]

Set y-component of momentum $ p_y $.

Definition at line 355 of file Vector4.hh.

References FourVector::setY().

Referenced by FourMomentum::FourMomentum().

00355 { setY(py); return *this; }

FourMomentum& setPz ( double  pz  )  [inline]

Set z-component of momentum $ p_z $.

Definition at line 358 of file Vector4.hh.

References FourVector::setZ().

Referenced by FourMomentum::FourMomentum().

00358 { setZ(pz); return *this; }

double mass2 (  )  const [inline]

Get squared mass $ m^2 = E^2 - p^2 $ (the Lorentz self-invariant).

Definition at line 361 of file Vector4.hh.

References FourVector::invariant().

Referenced by D0_1996_S3214044::_safeMass(), CDF_1997_S3541940::_safeMass(), CDF_1996_S3349578::_safeMass(), FourMomentum::mass(), Rivet::mass2(), Hemispheres::project(), and DISKinematics::project().

00361                          {
00362       return invariant();
00363     }

double mass (  )  const [inline]

Get mass $ m = \sqrt{E^2 - p^2} $ (the Lorentz self-invariant).

Definition at line 366 of file Vector4.hh.

References Rivet::isZero(), and FourMomentum::mass2().

Referenced by MC_DIPHOTON::analyze(), D0_2010_S8570965::analyze(), D0_1998_S3711838::analyze(), CDF_2008_NOTE_9351::analyze(), CDF_2005_S6080774::analyze(), CDF_2000_S4155203::analyze(), CDF_1996_S3108457::analyze(), CDF_1991_S2313472::analyze(), Rivet::mass(), Particle::mass(), and InvMassFinalState::project().

00366                         {
00367       assert(Rivet::isZero(mass2()) || mass2() > 0);
00368       return sqrt(mass2());
00369     }

double rapidity (  )  const [inline]

Calculate rapidity.

Definition at line 372 of file Vector4.hh.

References FourMomentum::E(), and FourMomentum::pz().

Referenced by CDF_1996_S3349578::_fiveJetAnalysis(), CDF_1996_S3349578::_fourJetAnalysis(), CDF_1996_S3349578::_threeJetAnalysis(), STAR_2006_S6860818::analyze(), STAR_2006_S6500200::analyze(), MC_PHOTONJETS::analyze(), D0_2010_S8566488::analyze(), D0_2009_S8349509::analyze(), D0_2009_S8320160::analyze(), D0_2008_S7863608::analyze(), D0_2008_S7719523::analyze(), CDF_2008_S8095620::analyze(), CDF_2008_S8093652::analyze(), CDF_2008_S7782535::analyze(), CDF_2008_S7541902::analyze(), CDF_2006_S6653332::analyze(), CDF_2005_S6217184::analyze(), CDF_1997_S3541940::analyze(), Rivet::cmpMomByAscAbsRapidity(), Rivet::cmpMomByAscRapidity(), Rivet::cmpMomByDescAbsRapidity(), Rivet::cmpMomByDescRapidity(), Rivet::cmpParticleByAscAbsRapidity(), Rivet::cmpParticleByAscRapidity(), Rivet::cmpParticleByDescAbsRapidity(), Rivet::cmpParticleByDescRapidity(), Rivet::deltaR(), CentralEtHCM::project(), and Rivet::rapidity().

00372                             {
00373       return 0.5 * std::log( (E() + pz()) / (E() - pz()) );
00374     }

double pT2 (  )  const [inline]

Calculate squared transverse momentum $ p_T^2 $.

Definition at line 377 of file Vector4.hh.

References Vector3::polarRadius2(), and FourVector::vector3().

Referenced by ParticleBase::byPTAscending::operator()(), FourMomentum::pT(), and Rivet::pT2().

00377                        {
00378       return vector3().polarRadius2();
00379     }

double pT (  )  const [inline]

Calculate transverse momentum $ p_T $.

Definition at line 382 of file Vector4.hh.

References FourMomentum::pT2().

Referenced by SVertex::_applyVtxTrackCuts(), CDF_2004_S5839831::_calcTransCones(), FinalState::accept(), UA1_1990_S2044935::analyze(), STAR_2009_UE_HELEN::analyze(), STAR_2008_S7993412::analyze(), STAR_2006_S6870392::analyze(), STAR_2006_S6860818::analyze(), STAR_2006_S6500200::analyze(), MC_ZJETS::analyze(), MC_WJETS::analyze(), MC_SUSY::analyze(), MC_PHOTONJETUE::analyze(), MC_PHOTONJETS::analyze(), MC_LEADINGJETS::analyze(), MC_DIPHOTON::analyze(), MC_DIJET::analyze(), D0_2010_S8570965::analyze(), D0_2009_S8349509::analyze(), D0_2008_S7863608::analyze(), D0_2008_S7719523::analyze(), D0_2007_S7075677::analyze(), D0_2006_S6438750::analyze(), D0_2004_S5992206::analyze(), D0_2001_S4674421::analyze(), D0_1998_S3711838::analyze(), CDF_2009_S8233977::analyze(), CDF_2008_S8095620::analyze(), CDF_2008_S7782535::analyze(), CDF_2008_S7541902::analyze(), CDF_2008_NOTE_9351::analyze(), CDF_2008_LEADINGJETS::analyze(), CDF_2005_S6217184::analyze(), CDF_2005_S6080774::analyze(), CDF_2004_S5839831::analyze(), CDF_2002_S4796047::analyze(), CDF_2001_S4751469::analyze(), CDF_2000_S4155203::analyze(), CDF_1994_S2952106::analyze(), CDF_1991_S2313472::analyze(), CDF_1988_S1865951::analyze(), ATLAS_2010_S8591806::analyze(), Rivet::cmpMomByAscPt(), Rivet::cmpMomByPt(), Rivet::cmpParticleByAscPt(), Rivet::cmpParticleByPt(), VetoedFinalState::project(), JetShape::project(), FinalState::project(), and Rivet::pT().

00382                       {
00383       return sqrt(pT2());
00384     }

double Et2 (  )  const [inline]

Calculate transverse energy $ E_T^2 = E^2 \sin^2{\theta} $.

Definition at line 387 of file Vector4.hh.

References FourMomentum::Et().

Referenced by Rivet::Et2(), and ParticleBase::byETAscending::operator()().

00387                        {
00388       return Et() * Et();
00389     }

double Et (  )  const [inline]

Calculate transverse energy $ E_T = E \sin{\theta} $.

Definition at line 392 of file Vector4.hh.

References FourMomentum::E(), and FourVector::polarAngle().

Referenced by MC_DIPHOTON::analyze(), D0_2010_S8570965::analyze(), D0_2008_S7837160::analyze(), D0_1998_S3711838::analyze(), D0_1996_S3324664::analyze(), CDF_2009_S8436959::analyze(), CDF_2009_S8233977::analyze(), CDF_2008_S7541902::analyze(), CDF_2008_LEADINGJETS::analyze(), CDF_2005_S6080774::analyze(), CDF_2001_S4517016::analyze(), CDF_1991_S2313472::analyze(), Rivet::cmpMomByAscEt(), Rivet::cmpMomByEt(), Rivet::cmpParticleByAscEt(), Rivet::cmpParticleByEt(), Rivet::Et(), FourMomentum::Et2(), TotalVisibleMomentum::project(), NeutralFinalState::project(), and CentralEtHCM::project().

00392                       {
00393       return E() * sin(polarAngle());
00394     }

Vector3 boostVector (  )  const [inline]

Calculate boost vector (in units of $ \beta $).

Todo:
Be careful about c=1 convention...

Definition at line 397 of file Vector4.hh.

References FourMomentum::E(), FourMomentum::px(), FourMomentum::py(), and FourMomentum::pz().

Referenced by CDF_1997_S3541940::_avg_beam_in_lab(), CDF_1996_S3349578::_avg_beam_in_lab(), CDF_1996_S3349578::_fiveJetAnalysis(), D0_1996_S3214044::_fourJetAnalysis(), CDF_1996_S3349578::_fourJetAnalysis(), D0_1996_S3214044::_threeJetAnalysis(), CDF_1996_S3349578::_threeJetAnalysis(), CDF_1997_S3541940::analyze(), CDF_1996_S3108457::analyze(), BELLE_2006_S6265367::analyze(), Rivet::boostVector(), and DISKinematics::project().

00397                                 {
00398       // const Vector3 p3 = vector3();
00399       // const double m2 = mass2();
00400       // if (Rivet::isZero(m2)) return p3.unit();
00401       // else {
00402       //   // Could also do this via beta = tanh(rapidity), but that's
00403       //   // probably more messy from a numerical hygiene point of view.
00404       //   const double p2 = p3.mod2();
00405       //   const double beta = sqrt( p2 / (m2 + p2) );
00406       //   return beta * p3.unit();
00407       // }
00408       /// @todo Be careful about c=1 convention...
00409       return Vector3(px()/E(), py()/E(), pz()/E());
00410     }

double t (  )  const [inline, inherited]

Definition at line 49 of file Vector4.hh.

Referenced by FourVector::contract(), FourMomentum::E(), FourVector::invariant(), and Rivet::toString().

00049 { return get(0); }

double x (  )  const [inline, inherited]

Definition at line 50 of file Vector4.hh.

Referenced by FourVector::contract(), FourVector::invariant(), ALEPH_1996_S3196992::particleInJet(), FourMomentum::px(), and Rivet::toString().

00050 { return get(1); }

double y (  )  const [inline, inherited]

Definition at line 51 of file Vector4.hh.

Referenced by FourVector::contract(), FourVector::invariant(), ALEPH_1996_S3196992::particleInJet(), FourMomentum::py(), and Rivet::toString().

00051 { return get(2); }

double z (  )  const [inline, inherited]

Definition at line 52 of file Vector4.hh.

Referenced by H1_1994_S2919893::analyze(), FourVector::contract(), FourVector::invariant(), ALEPH_1996_S3196992::particleInJet(), FourMomentum::pz(), and Rivet::toString().

00052 { return get(3); }

FourVector& setT ( const double  t  )  [inline, inherited]

Definition at line 53 of file Vector4.hh.

Referenced by FourVector::FourVector(), and FourMomentum::setE().

00053 { set(0, t); return *this; }

FourVector& setX ( const double  x  )  [inline, inherited]

Definition at line 54 of file Vector4.hh.

Referenced by FourVector::FourVector(), and FourMomentum::setPx().

00054 { set(1, x); return *this; }

FourVector& setY ( const double  y  )  [inline, inherited]

Definition at line 55 of file Vector4.hh.

Referenced by FourVector::FourVector(), and FourMomentum::setPy().

00055 { set(2, y); return *this; }

FourVector& setZ ( const double  z  )  [inline, inherited]

Definition at line 56 of file Vector4.hh.

Referenced by FourVector::FourVector(), and FourMomentum::setPz().

00056 { set(3, z); return *this; }

double invariant (  )  const [inline, inherited]

Definition at line 58 of file Vector4.hh.

References FourVector::t(), FourVector::x(), FourVector::y(), and FourVector::z().

Referenced by D0_2001_S4674421::analyze(), Rivet::invariant(), and FourMomentum::mass2().

00058                              {
00059       return t()*t() - x()*x() - y()*y() - z()*z();
00060     }

double angle ( const FourVector &  v  )  const [inline, inherited]

Definition at line 62 of file Vector4.hh.

References Vector3::angle(), and FourVector::vector3().

Referenced by D0_1996_S3214044::_fourJetAnalysis(), H1_2000_S4129130::analyze(), H1_1994_S2919893::analyze(), and Rivet::angle().

00062                                             {
00063       return vector3().angle( v.vector3() );
00064     }

double angle ( const Vector3 &  v3  )  const [inline, inherited]

Definition at line 66 of file Vector4.hh.

References Vector3::angle(), and FourVector::vector3().

00066                                           {
00067       return vector3().angle(v3);
00068     }

double polarRadius2 (  )  const [inline, inherited]

Definition at line 70 of file Vector4.hh.

References Vector3::polarRadius2(), and FourVector::vector3().

Referenced by Rivet::polarRadius2().

00070                                 {
00071       return vector3().polarRadius2();
00072     }

double perp2 (  )  const [inline, inherited]

Synonym for polarRadius2.

Definition at line 75 of file Vector4.hh.

References Vector3::perp2(), and FourVector::vector3().

Referenced by Rivet::perp2().

00075                          {
00076       return vector3().perp2();
00077     }

double rho2 (  )  const [inline, inherited]

Synonym for polarRadius2.

Definition at line 80 of file Vector4.hh.

References Vector3::rho2(), and FourVector::vector3().

Referenced by Rivet::rho2().

00080                         {
00081       return vector3().rho2();
00082     }

double polarRadius (  )  const [inline, inherited]

Definition at line 84 of file Vector4.hh.

References Vector3::polarRadius(), and FourVector::vector3().

Referenced by Rivet::polarRadius().

00084                                {
00085       return vector3().polarRadius();
00086     }

double perp (  )  const [inline, inherited]

Synonym for polarRadius.

Definition at line 89 of file Vector4.hh.

References Vector3::perp(), and FourVector::vector3().

Referenced by Rivet::perp().

00089                         {
00090       return vector3().perp();
00091     }

double rho (  )  const [inline, inherited]

Synonym for polarRadius.

Definition at line 94 of file Vector4.hh.

References Vector3::rho(), and FourVector::vector3().

Referenced by Rivet::rho().

00094                        {
00095       return vector3().rho();
00096     }

double azimuthalAngle ( const PhiMapping  mapping = ZERO_2PI  )  const [inline, inherited]

Angle subtended by the 3-vector's projection in x-y and the x-axis.

Definition at line 99 of file Vector4.hh.

References Vector3::azimuthalAngle(), and FourVector::vector3().

Referenced by CDF_2004_S5839831::_calcTransCones(), MC_LEADINGJETS::analyze(), H1_1994_S2919893::analyze(), D0_2008_S7863608::analyze(), D0_2008_S7719523::analyze(), D0_2008_S6879055::analyze(), D0_2006_S6438750::analyze(), CDF_2008_S8095620::analyze(), CDF_2008_S7540469::analyze(), CDF_2006_S6653332::analyze(), CDF_2004_S5839831::analyze(), Rivet::azimuthalAngle(), Rivet::deltaR(), DISKinematics::project(), and ClusteredPhotons::project().

00099                                                                      {
00100       return vector3().azimuthalAngle(mapping);
00101     }

double phi ( const PhiMapping  mapping = ZERO_2PI  )  const [inline, inherited]

Synonym for azimuthalAngle.

Definition at line 104 of file Vector4.hh.

References Vector3::phi(), and FourVector::vector3().

Referenced by STAR_2009_UE_HELEN::analyze(), STAR_2008_S7993412::analyze(), MC_SUSY::analyze(), MC_PHOTONJETUE::analyze(), MC_PHOTONJETS::analyze(), MC_LEADINGJETS::analyze(), MC_DIPHOTON::analyze(), D0_2010_S8570965::analyze(), D0_2009_S8349509::analyze(), D0_1996_S3324664::analyze(), CDF_2008_LEADINGJETS::analyze(), CDF_2005_S6080774::analyze(), CDF_2001_S4751469::analyze(), CDF_1994_S2952106::analyze(), and Rivet::phi().

00104                                                           {
00105       return vector3().phi(mapping);
00106     }

double polarAngle (  )  const [inline, inherited]

Angle subtended by the 3-vector and the z-axis.

Definition at line 109 of file Vector4.hh.

References Vector3::polarAngle(), and FourVector::vector3().

Referenced by H1_1994_S2919893::beamAngle(), FourMomentum::Et(), Rivet::polarAngle(), and DISKinematics::project().

00109                               {
00110       return vector3().polarAngle();
00111     }

double theta (  )  const [inline, inherited]

Synonym for polarAngle.

Definition at line 114 of file Vector4.hh.

References Vector3::theta(), and FourVector::vector3().

Referenced by D0_1996_S3214044::_fourJetAnalysis(), ALEPH_1996_S3196992::analyze(), and Rivet::theta().

00114                          {
00115       return vector3().theta();
00116     }

double pseudorapidity (  )  const [inline, inherited]

Definition at line 118 of file Vector4.hh.

References Vector3::pseudorapidity(), and FourVector::vector3().

Referenced by CDF_2004_S5839831::_calcTransCones(), UA5_1986_S1583476::analyze(), UA5_1982_S875503::analyze(), SFM_1984_S1178091::analyze(), MC_TTBAR::analyze(), H1_2000_S4129130::analyze(), H1_1994_S2919893::analyze(), D0_2008_S7863608::analyze(), D0_2008_S7837160::analyze(), D0_2008_S7719523::analyze(), D0_2008_S6879055::analyze(), D0_2006_S6438750::analyze(), CDF_2008_S7540469::analyze(), CDF_2004_S5839831::analyze(), CDF_1990_S2089246::analyze(), Rivet::cmpMomByAscAbsPseudorapidity(), Rivet::cmpMomByAscPseudorapidity(), Rivet::cmpMomByDescAbsPseudorapidity(), Rivet::cmpMomByDescPseudorapidity(), Rivet::cmpParticleByAscAbsPseudorapidity(), Rivet::cmpParticleByAscPseudorapidity(), Rivet::cmpParticleByDescAbsPseudorapidity(), Rivet::cmpParticleByDescPseudorapidity(), TriggerUA5::project(), TriggerCDFRun0Run1::project(), SVertex::project(), ClusteredPhotons::project(), and Rivet::pseudorapidity().

00118                                   {
00119       return vector3().pseudorapidity();
00120     }

double eta (  )  const [inline, inherited]

Synonym for pseudorapidity.

Definition at line 123 of file Vector4.hh.

References Vector3::eta(), and FourVector::vector3().

Referenced by FinalState::accept(), UA1_1990_S2044935::analyze(), STAR_2008_S7993412::analyze(), MC_ZJETS::analyze(), MC_WJETS::analyze(), MC_SUSY::analyze(), MC_PHOTONJETUE::analyze(), MC_PHOTONJETS::analyze(), MC_DIPHOTON::analyze(), D0_2010_S8570965::analyze(), D0_1996_S3324664::analyze(), CDF_2009_S8233977::analyze(), CDF_2008_S7541902::analyze(), CDF_2008_NOTE_9351::analyze(), CDF_2005_S6080774::analyze(), CDF_2001_S4517016::analyze(), CDF_2000_S4266730::analyze(), CDF_1996_S3418421::analyze(), CDF_1994_S2952106::analyze(), ATLAS_2010_S8591806::analyze(), Rivet::eta(), NeutralFinalState::project(), and FinalState::project().

00123                        {
00124       return vector3().eta();
00125     }

Vector3 vector3 (  )  const [inline, inherited]

Get the spatial part of the 4-vector as a 3-vector.

Definition at line 128 of file Vector4.hh.

Referenced by CDF_1996_S3349578::_fiveJetAnalysis(), D0_1996_S3214044::_fourJetAnalysis(), CDF_1996_S3349578::_fourJetAnalysis(), CDF_1997_S3541940::_psi(), CDF_1996_S3349578::_psi(), D0_1996_S3214044::_threeJetAnalysis(), CDF_1996_S3349578::_threeJetAnalysis(), OPAL_1998_S3780481::analyze(), DELPHI_1995_S3137023::analyze(), CDF_1997_S3541940::analyze(), ALEPH_1996_S3486095::analyze(), Rivet::angle(), FourVector::angle(), FourVector::azimuthalAngle(), Thrust::calc(), Sphericity::calc(), Rivet::deltaR(), FourVector::eta(), FourMomentum::p(), FourVector::perp(), FourVector::perp2(), FourVector::phi(), FourVector::polarAngle(), FourVector::polarRadius(), FourVector::polarRadius2(), Hemispheres::project(), FoxWolframMoments::project(), DISKinematics::project(), FourVector::pseudorapidity(), FourMomentum::pT2(), FourVector::rho(), FourVector::rho2(), and FourVector::theta().

00128                             {
00129       return Vector3(get(1), get(2), get(3));
00130     }

double contract ( const FourVector &  v  )  const [inline, inherited]

Contract two 4-vectors, with metric signature (+ - - -).

Definition at line 134 of file Vector4.hh.

References FourVector::t(), FourVector::x(), FourVector::y(), and FourVector::z().

Referenced by Rivet::contract(), FourVector::dot(), and FourVector::operator*().

00134                                                {
00135       const double result = t()*v.t() - x()*v.x() - y()*v.y() - z()*v.z();
00136       return result;
00137     }

double dot ( const FourVector &  v  )  const [inline, inherited]

Contract two 4-vectors, with metric signature (+ - - -).

Definition at line 140 of file Vector4.hh.

References FourVector::contract().

00140                                           {
00141       return contract(v);
00142     }

double operator* ( const FourVector &  v  )  const [inline, inherited]

Contract two 4-vectors, with metric signature (+ - - -).

Definition at line 145 of file Vector4.hh.

References FourVector::contract().

00145                                                 {
00146       return contract(v);
00147     }

FourVector& operator*= ( double  a  )  [inline, inherited]

Multiply by a scalar.

Definition at line 150 of file Vector4.hh.

References Vector::_vec, Vector< 4 >::_vec, and FourVector::multiply.

00150                                      {
00151       _vec = multiply(a, *this)._vec;
00152       return *this;
00153     }

FourVector& operator/= ( double  a  )  [inline, inherited]

Divide by a scalar.

Definition at line 156 of file Vector4.hh.

References Vector::_vec, Vector< 4 >::_vec, and FourVector::multiply.

00156                                      {
00157       _vec = multiply(1.0/a, *this)._vec;
00158       return *this;
00159     }

FourVector& operator+= ( const FourVector &  v  )  [inline, inherited]

Definition at line 161 of file Vector4.hh.

References Vector< 4 >::_vec.

00161                                                 {
00162       _vec = add(*this, v)._vec;
00163       return *this;
00164     }

FourVector& operator-= ( const FourVector &  v  )  [inline, inherited]

Definition at line 166 of file Vector4.hh.

References Vector< 4 >::_vec.

00166                                                 {
00167       _vec = add(*this, -v)._vec;
00168       return *this;
00169     }

FourVector operator- (  )  const [inline, inherited]

Invert the vector.

Reimplemented from Vector< 4 >.

Definition at line 171 of file Vector4.hh.

References Vector< 4 >::_vec, and Vector::_vec.

00171                                  {
00172       FourVector result;
00173       result._vec = -_vec;
00174       return result;
00175     }

const double& get ( const size_t  index  )  const [inline, inherited]

Definition at line 33 of file VectorN.hh.

References Vector::_vec.

00033                                                 {
00034       if (index >= N) {
00035         throw std::runtime_error("Tried to access an invalid vector index.");
00036       } else {
00037         return _vec(index);
00038       }
00039     }

double& get ( const size_t  index  )  [inline, protected, inherited]

Definition at line 126 of file VectorN.hh.

References Vector::_vec.

00126                                     {
00127       if (index >= N) {
00128         throw std::runtime_error("Tried to access an invalid vector index.");
00129       } else {
00130         return _vec(index);
00131       }
00132     }

const double& operator[] ( const size_t  index  )  const [inline, inherited]

Direct access to vector elements by index.

Definition at line 42 of file VectorN.hh.

00042                                                        {
00043       return get(index);
00044     }

double& operator[] ( const size_t  index  )  [inline, inherited]

Direct access to vector elements by index.

Definition at line 47 of file VectorN.hh.

00047                                            {
00048       return get(index);
00049     }

Vector<N>& set ( const size_t  index,
const double  value 
) [inline, inherited]

Set indexed value.

Definition at line 52 of file VectorN.hh.

References Vector::_vec.

00052                                                            {
00053       if (index >= N) {
00054         throw std::runtime_error("Tried to access an invalid vector index.");
00055       } else {
00056         _vec[index] = value;
00057       }
00058       return *this;
00059     }

size_t size (  )  const [inline, inherited]

Vector dimensionality.

Definition at line 62 of file VectorN.hh.

00062                         {
00063       return N;
00064     }

bool isZero ( double  tolerance = 1E-5  )  const [inline, inherited]

Check for nullness, allowing for numerical precision.

Definition at line 67 of file VectorN.hh.

References Vector::_vec, and Rivet::isZero().

00067                                              {
00068       for (size_t i=0; i < N; ++i) {
00069         if (! Rivet::isZero(_vec[i], tolerance) ) return false;
00070       }
00071       return true;
00072     }

double mod2 (  )  const [inline, inherited]

Calculate the modulus-squared of a vector. $ \sum_{i=1}^N x_i^2 $.

Definition at line 76 of file VectorN.hh.

References Vector::mod2(), and Vector::size().

00076                         {
00077       double mod2 = 0.0;
00078       for (size_t i = 0; i < size(); ++i) {
00079         const double element = get(i);
00080         mod2 += element*element;
00081       }
00082       return mod2;
00083     }

double mod (  )  const [inline, inherited]

Calculate the modulus of a vector. $ \sqrt{\sum_{i=1}^N x_i^2} $.

Definition at line 87 of file VectorN.hh.

References Vector::mod2().

00087                        {
00088       const double norm = mod2();
00089       assert(norm >= 0);
00090       return sqrt(norm);
00091     }

bool operator== ( const Vector< N > &  a  )  const [inline, inherited]

Definition at line 100 of file VectorN.hh.

References Vector::_vec.

00100                                               {
00101       return _vec == a._vec;
00102     }

bool operator!= ( const Vector< N > &  a  )  const [inline, inherited]

Definition at line 104 of file VectorN.hh.

References Vector::_vec.

00104                                               {
00105       return _vec != a._vec;
00106     }

bool operator< ( const Vector< N > &  a  )  const [inline, inherited]

Definition at line 108 of file VectorN.hh.

References Vector::_vec.

00108                                              {
00109       return _vec < a._vec;
00110     }

bool operator<= ( const Vector< N > &  a  )  const [inline, inherited]

Definition at line 112 of file VectorN.hh.

References Vector::_vec.

00112                                               {
00113       return _vec <= a._vec;
00114     }

bool operator> ( const Vector< N > &  a  )  const [inline, inherited]

Definition at line 116 of file VectorN.hh.

References Vector::_vec.

00116                                              {
00117       return _vec > a._vec;
00118     }

bool operator>= ( const Vector< N > &  a  )  const [inline, inherited]

Definition at line 120 of file VectorN.hh.

References Vector::_vec.

00120                                               {
00121       return _vec >= a._vec;
00122     }

Member Data Documentation

Eigen::Vector<double,N> _vec [protected, inherited]

Vector.

Definition at line 135 of file VectorN.hh.

Referenced by FourVector::operator*=(), FourVector::operator+=(), FourVector::operator-(), FourVector::operator-=(), and FourVector::operator/=().

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