Class describing a 4D coordinate system or momentum-energy vectors stored as (Px, Py, Pz, M).
This system is useful to describe ultra-relativistic particles (like electrons at LHC) to avoid numerical errors evaluating the mass when E >>> m The metric used is (-,-,-,+) Spacelike particles (M2 < 0) are described with negative mass values, but in this case m2 must alwasy be less than P2 to preserve a positive value of E2
Definition at line 47 of file PxPyPzM4D.h.
Public Types | |
typedef ScalarType | Scalar |
Public Member Functions | |
PxPyPzM4D () | |
Default constructor with x=y=z=m=0. | |
template<class CoordSystem > | |
PxPyPzM4D (const CoordSystem &v) | |
construct from any 4D coordinate system class implementing X(), Y(), X() and M() | |
PxPyPzM4D (const PxPyPzM4D &v) | |
copy constructor | |
PxPyPzM4D (Scalar px, Scalar py, Scalar pz, Scalar m) | |
Constructor from x, y , z , m values. | |
Scalar | E () const |
Energy. | |
Scalar | E2 () const |
energy squared | |
Scalar | Et () const |
transverse energy | |
Scalar | Et2 () const |
transverse energy squared | |
Scalar | Eta () const |
pseudorapidity | |
void | GetCoordinates (Scalar &px, Scalar &py, Scalar &pz, Scalar &m) const |
get internal data into 4 Scalar numbers | |
void | GetCoordinates (Scalar dest[]) const |
get internal data into an array of 4 Scalar numbers | |
Scalar | M () const |
Scalar | M2 () const |
vector magnitude squared (or mass squared) In case of negative mass (spacelike particles return negative values) | |
Scalar | Mag () const |
Scalar | Mag2 () const |
Scalar | Mt () const |
transverse mass | |
Scalar | Mt2 () const |
transverse mass squared | |
void | Negate () |
negate the 4-vector - Note that the energy cannot be negate (would need an additional data member) therefore negate will work only on the spatial components. | |
bool | operator!= (const PxPyPzM4D &rhs) const |
template<class AnyCoordSystem > | |
PxPyPzM4D & | operator= (const AnyCoordSystem &v) |
construct from any 4D coordinate system class implementing X(), Y(), X() and M() | |
PxPyPzM4D & | operator= (const PxPyPzM4D &v) |
assignment operator | |
bool | operator== (const PxPyPzM4D &rhs) const |
Exact equality. | |
Scalar | P () const |
magnitude of spatial components (magnitude of 3-momentum) | |
Scalar | P2 () const |
squared magnitude of spatial components | |
Scalar | Perp () const |
Scalar | Perp2 () const |
Scalar | Phi () const |
azimuthal angle | |
Scalar | Pt () const |
Transverse spatial component (P_perp or rho) | |
Scalar | Pt2 () const |
transverse spatial component squared | |
Scalar | Px () const |
Scalar | Py () const |
Scalar | Pz () const |
Scalar | R () const |
Scalar | Rho () const |
void | Scale (const Scalar &a) |
scale coordinate values by a scalar quantity a | |
void | SetCoordinates (const Scalar src[]) |
Set internal data based on an array of 4 Scalar numbers. | |
void | SetCoordinates (Scalar px, Scalar py, Scalar pz, Scalar m) |
Set internal data based on 4 Scalar numbers. | |
void | SetM (Scalar m) |
set T value | |
void | SetPx (Scalar px) |
set X value | |
void | SetPxPyPzE (Scalar px, Scalar py, Scalar pz, Scalar e) |
set all values | |
void | SetPy (Scalar py) |
set Y value | |
void | SetPz (Scalar pz) |
set Z value | |
Scalar | T () const |
Scalar | t () const |
Scalar | Theta () const |
polar angle | |
Scalar | X () const |
Scalar | x () const |
Scalar | Y () const |
Scalar | y () const |
Scalar | Z () const |
Scalar | z () const |
Private Member Functions | |
void | RestrictNegMass () |
Private Attributes | |
ScalarType | fM |
ScalarType | fX |
(contigous) data containing the coordinate values x,y,z,t | |
ScalarType | fY |
ScalarType | fZ |
#include <Math/GenVector/PxPyPzM4D.h>
typedef ScalarType ROOT::Math::PxPyPzM4D< ScalarType >::Scalar |
Definition at line 51 of file PxPyPzM4D.h.
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Default constructor with x=y=z=m=0.
Definition at line 58 of file PxPyPzM4D.h.
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Constructor from x, y , z , m values.
Definition at line 64 of file PxPyPzM4D.h.
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construct from any 4D coordinate system class implementing X(), Y(), X() and M()
Definition at line 75 of file PxPyPzM4D.h.
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copy constructor
Definition at line 84 of file PxPyPzM4D.h.
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Energy.
Definition at line 157 of file PxPyPzM4D.h.
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energy squared
Definition at line 186 of file PxPyPzM4D.h.
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transverse energy
Definition at line 238 of file PxPyPzM4D.h.
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transverse energy squared
Definition at line 229 of file PxPyPzM4D.h.
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pseudorapidity
Definition at line 257 of file PxPyPzM4D.h.
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get internal data into 4 Scalar numbers
Definition at line 137 of file PxPyPzM4D.h.
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get internal data into an array of 4 Scalar numbers
Definition at line 123 of file PxPyPzM4D.h.
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Definition at line 147 of file PxPyPzM4D.h.
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vector magnitude squared (or mass squared) In case of negative mass (spacelike particles return negative values)
Definition at line 176 of file PxPyPzM4D.h.
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Definition at line 181 of file PxPyPzM4D.h.
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Definition at line 179 of file PxPyPzM4D.h.
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transverse mass
Definition at line 213 of file PxPyPzM4D.h.
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transverse mass squared
Definition at line 208 of file PxPyPzM4D.h.
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negate the 4-vector - Note that the energy cannot be negate (would need an additional data member) therefore negate will work only on the spatial components.
One would need to use negate only with vectors having the energy as data members
Definition at line 302 of file PxPyPzM4D.h.
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Definition at line 326 of file PxPyPzM4D.h.
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construct from any 4D coordinate system class implementing X(), Y(), X() and M()
Definition at line 104 of file PxPyPzM4D.h.
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assignment operator
Definition at line 90 of file PxPyPzM4D.h.
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Exact equality.
Definition at line 323 of file PxPyPzM4D.h.
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magnitude of spatial components (magnitude of 3-momentum)
Definition at line 169 of file PxPyPzM4D.h.
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squared magnitude of spatial components
Definition at line 164 of file PxPyPzM4D.h.
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Definition at line 202 of file PxPyPzM4D.h.
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Definition at line 196 of file PxPyPzM4D.h.
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azimuthal angle
Definition at line 247 of file PxPyPzM4D.h.
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Transverse spatial component (P_perp or rho)
Definition at line 201 of file PxPyPzM4D.h.
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transverse spatial component squared
Definition at line 195 of file PxPyPzM4D.h.
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Definition at line 144 of file PxPyPzM4D.h.
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Definition at line 145 of file PxPyPzM4D.h.
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Definition at line 146 of file PxPyPzM4D.h.
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Definition at line 170 of file PxPyPzM4D.h.
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Definition at line 358 of file PxPyPzM4D.h.
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Definition at line 203 of file PxPyPzM4D.h.
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scale coordinate values by a scalar quantity a
Definition at line 312 of file PxPyPzM4D.h.
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Set internal data based on an array of 4 Scalar numbers.
Definition at line 115 of file PxPyPzM4D.h.
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Set internal data based on 4 Scalar numbers.
Definition at line 129 of file PxPyPzM4D.h.
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set T value
Definition at line 285 of file PxPyPzM4D.h.
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set X value
Definition at line 267 of file PxPyPzM4D.h.
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set all values
Definition at line 393 of file PxPyPzM4D.h.
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set Y value
Definition at line 273 of file PxPyPzM4D.h.
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set Z value
Definition at line 279 of file PxPyPzM4D.h.
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Definition at line 159 of file PxPyPzM4D.h.
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Definition at line 336 of file PxPyPzM4D.h.
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polar angle
Definition at line 252 of file PxPyPzM4D.h.
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Definition at line 149 of file PxPyPzM4D.h.
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Definition at line 333 of file PxPyPzM4D.h.
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Definition at line 150 of file PxPyPzM4D.h.
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Definition at line 334 of file PxPyPzM4D.h.
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Definition at line 151 of file PxPyPzM4D.h.
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Definition at line 335 of file PxPyPzM4D.h.
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Definition at line 375 of file PxPyPzM4D.h.
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(contigous) data containing the coordinate values x,y,z,t
Definition at line 372 of file PxPyPzM4D.h.
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Definition at line 373 of file PxPyPzM4D.h.
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Definition at line 374 of file PxPyPzM4D.h.