The Units namespace contains the declaration of a number of classes for variables with dimension. More...

Typedefs
template<long int L, long int E, long int Q, long int DL = 1, long int DE = 1, long int DQ = 1>
using	Qty = ThePEG::Qty< std::ratio< L, DL >, std::ratio< E, DE >, std::ratio< Q, DQ > >
	adapter for the old style of naming quantities

typedef Qty< 0, 1, 0 >	Energy
	Energy. More...

typedef Energy	Mass
	Mass has the same unit as Energy <=> c == 1. More...

typedef Qty< 1, 0, 0 >	Length
	Length. More...

typedef Length	Time
	Time has the same unit as Length. More...

typedef Qty<-1, 0, 0 >	InvLength
	Inverse Length. More...

typedef double	Velocity
	Velocities are dimensionless fractions of c. More...

typedef Qty< 0, 0, 1 >	Charge
	Charge. More...

typedef Qty< 1, 1, 0 >	AngularMomentum
	Angular momentum. More...

typedef Qty<-1, 1, 0 >	Tension
	Tension. More...

typedef Qty< 2, 0, 0 >	Area
	Area will be assumed to be Length . More...

typedef Qty<-2, 0, 0 >	InvArea
	Inverse Area. More...

typedef Area	CrossSection
	Cross section is an area. More...

typedef Qty< 2, 2, 0 >	Energy2XSec
	CrossSection*Energy2. More...

typedef Qty< 2,-2, 0 >	DiffXSec
	CrossSection/Energy2. More...

typedef Qty< 2,-4, 0 >	Diff2XSec
	CrossSection/Energy4. More...

typedef Qty< 2,-6, 0 >	Diff3XSec
	CrossSection/Energy6.

typedef Energy2	Scale
	Scale is the same as a squared energy. More...

typedef ThreeVector< Length >	Point
	A point in three-dimensional euclidean space. More...

typedef ThreeVector< Length >	Distance
	A distance in three-dimensional euclidean space. More...

typedef ThreeVector< double >	Axis
	A direction in three-dimensional euclidean space. More...

typedef ThreeVector< Energy >	Momentum3
	A momentum in three-dimensional euclidean space. More...

typedef ThreeVector< double >	Boost
	A three-dimensional boost vector. More...

typedef LorentzVector< Length >	LorentzDistance
	A distance in four-dimensional space-time. More...

typedef Lorentz5Vector< Length >	Lorentz5Distance
	A distance in four-dimensional space-time with an explicit invariant time component. More...

typedef LorentzVector< Length >	LorentzPoint
	A point in four-dimensional space-time. More...

typedef LorentzVector< Energy >	LorentzMomentum
	A momentum in four-dimensional space-time. More...

typedef Lorentz5Vector< Energy >	Lorentz5Momentum
	A momentum in four-dimensional space-time with an explicit invariant mass component. More...

typedef Transverse< Energy >	TransverseMomentum
	Transverse components of a momentum. More...

Higher powers of energy.
Even higher powers can be created with similar typedefs.
typedef Qty< 0, 2, 0 >	Energy2

typedef Qty< 0, 3, 0 >	Energy3

typedef Qty< 0, 4, 0 >	Energy4

typedef Qty< 0, 5, 0 >	Energy5

typedef Qty< 0, 6, 0 >	Energy6

typedef Qty< 0, 7, 0 >	Energy7

typedef Qty< 0, 8, 0 >	Energy8

typedef Qty< 0, 9, 0 >	Energy9

typedef Qty< 0, 10, 0 >	Energy10

typedef Qty< 0, 11, 0 >	Energy11

typedef Qty< 0, 12, 0 >	Energy12

typedef Qty< 0, 1, 0, 1, 2, 1 >	SqrtEnergy

typedef Qty< 0,-1, 0, 1, 2, 1 >	InvSqrtEnergy

typedef Qty< 0, -1, 0 >	InvEnergy

typedef Qty< 0, -2, 0 >	InvEnergy2

typedef Qty< 0, -3, 0 >	InvEnergy3

typedef Qty< 0, -4, 0 >	InvEnergy4

typedef Qty< 0, -5, 0 >	InvEnergy5

typedef Qty< 0, -6, 0 >	InvEnergy6

typedef Qty< 0, -7, 0 >	InvEnergy7

typedef Qty< 0, -8, 0 >	InvEnergy8

typedef Qty< 0, -9, 0 >	InvEnergy9

typedef Qty< 0,-10, 0 >	InvEnergy10

typedef Qty< 0,-11, 0 >	InvEnergy11

typedef Qty< 0,-12, 0 >	InvEnergy12

Variables
constexpr Qty< 1, 1, 0 >	hbarc = 197.326968e-15 * MeV * meter
	Planck's constant times c (PDG 2006 value 197.326968(17) MeV fm)

constexpr Qty< 1, 1, 0 >	hbar_Planck = hbarc / 1.0
	Planck's constant (PDG 2006 value 197.326968(17) MeV fm)

Pre-defined basic units.
constexpr Length	meter = 1.0e+3_mm

constexpr Length	millimeter = 1_mm

constexpr Length	mm = 1_mm

constexpr Length	centimeter = 10_mm

constexpr Length	micrometer = 1.0e-3_mm

constexpr Length	nanometer = 1.0e-6_mm

constexpr Length	picometer = 1.0e-9_mm

constexpr Length	femtometer = 1.0e-12_mm

constexpr Energy	keV = 1.0e-3_MeV

constexpr Energy	MeV = 1_MeV

constexpr Energy	GeV = 1_GeV

constexpr Energy	TeV = 1_TeV

constexpr Energy2	MeV2 = 1_MeV2

constexpr Energy2	GeV2 = 1_GeV2

constexpr InvEnergy	InvGeV = 1/GeV

constexpr Area	femtobarn = 1.0e-03_pb

constexpr Area	picobarn = 1_pb

constexpr Area	nanobarn = 1.0e+03_pb

constexpr Area	microbarn = 1.0e+06_pb

constexpr Area	millibarn = 1.0e+09_pb

constexpr Area	barn = 1.0e+12_pb

constexpr Charge	eplus = Charge::baseunit()

constexpr Length	operator"" _mm (long double x)

constexpr Length	operator"" _mm (unsigned long long x)

constexpr Energy	operator"" _MeV (long double x)

constexpr Energy	operator"" _MeV (unsigned long long x)

constexpr Energy	operator"" _GeV (long double x)

constexpr Energy	operator"" _GeV (unsigned long long x)

constexpr Energy	operator"" _TeV (long double x)

constexpr Energy	operator"" _TeV (unsigned long long x)

constexpr Energy2	operator"" _MeV2 (long double x)

constexpr Energy2	operator"" _MeV2 (unsigned long long x)

constexpr Energy2	operator"" _GeV2 (long double x)

constexpr Energy2	operator"" _GeV2 (unsigned long long x)

constexpr Area	operator"" _pb (long double x)

constexpr Area	operator"" _pb (unsigned long long x)

Detailed Description

The Units namespace contains the declaration of a number of classes for variables with dimension.

Currently they are all typedefs of double, but in the future the SIUnits package will be used.

The file Utilities/UnitIO.h defines helper-classes and helper functions to read and write variables with dimensions. As an example, to read and write an energy variable e in units of GeV, use: os << ounit(e, GeV) and is >> iunit(e, GeV)