iguana::physics::tools Namespace Reference

Detailed Description

physics tools

Functions
double	AdjustAnglePi (double ang)
	shift angle to the range \((-\pi,+\pi]\)
double	AdjustAngleTwoPi (double ang)
	shift angle to the range \((0,2\pi]\)
template<typename MOMENTUM_TYPE, typename AXIS_TYPE>
std::optional< double >	ParticleRapidity (MOMENTUM_TYPE const &momentum_vec, AXIS_TYPE const &axis_vec)
	calculate the rapidity of a particle, relative to an axis
std::optional< double >	PlaneAngle (ROOT::Math::XYZVector const v_a, ROOT::Math::XYZVector const v_b, ROOT::Math::XYZVector const v_c, ROOT::Math::XYZVector const v_d)
	calculate the angle between two planes
std::optional< ROOT::Math::XYZVector >	ProjectVector (ROOT::Math::XYZVector const v_a, ROOT::Math::XYZVector const v_b)
	projection of one vector onto another
std::optional< ROOT::Math::XYZVector >	RejectVector (ROOT::Math::XYZVector const v_a, ROOT::Math::XYZVector const v_b)
	projection of one vector onto the plane transverse to another vector
std::optional< double >	VectorAngle (ROOT::Math::XYZVector const v_a, ROOT::Math::XYZVector const v_b)
	calculate the angle between two vectors

Variables
double const	UNDEF {-10000}
	a value used when some calculation fails

Function Documentation

AdjustAnglePi()

double iguana::physics::tools::AdjustAnglePi

(

double

ang

)

shift angle to the range \((-\pi,+\pi]\)

Parameters

ang	the angle, in radians

Returns

the adjusted angle

AdjustAngleTwoPi()

double iguana::physics::tools::AdjustAngleTwoPi

(

double

ang

)

shift angle to the range \((0,2\pi]\)

Parameters

ang	the angle, in radians

Returns

the adjusted angle

ParticleRapidity()

template<typename MOMENTUM_TYPE, typename AXIS_TYPE>

std::optional< double > iguana::physics::tools::ParticleRapidity	(	MOMENTUM_TYPE const &	momentum_vec,
		AXIS_TYPE const &	axis_vec )

calculate the rapidity of a particle, relative to an axis

Given a particle momentum, this method calculates the rapidity of the boost along an axis which takes an observer to the frame in which the particle is moving perpendicular to the axis

Parameters

momentum_vec	the particle 4-momentum
axis_vec	the axis 3-vector

Returns

the rapidity

PlaneAngle()

std::optional< double > iguana::physics::tools::PlaneAngle	(	ROOT::Math::XYZVector const	v_a,
		ROOT::Math::XYZVector const	v_b,
		ROOT::Math::XYZVector const	v_c,
		ROOT::Math::XYZVector const	v_d )

calculate the angle between two planes

The two planes are transverse to \(\vec{v}_a\times\vec{v}_b\) and \(\vec{v}_c\times\vec{v}_d\)

Parameters

v_a	vector \(\vec{v}_a\)
v_b	vector \(\vec{v}_b\)
v_c	vector \(\vec{v}_c\)
v_d	vector \(\vec{v}_d\)

Returns

the angle between the planes, in radians, if the calculation is successful

ProjectVector()

std::optional< ROOT::Math::XYZVector > iguana::physics::tools::ProjectVector	(	ROOT::Math::XYZVector const	v_a,
		ROOT::Math::XYZVector const	v_b )

projection of one vector onto another

Parameters

v_a	vector \(\vec{v}_a\)
v_b	vector \(\vec{v}_b\)

Returns

the vector \(\vec{v}_a\) projected onto vector \(\vec{v}_b\), if the calculation is successful

RejectVector()

std::optional< ROOT::Math::XYZVector > iguana::physics::tools::RejectVector	(	ROOT::Math::XYZVector const	v_a,
		ROOT::Math::XYZVector const	v_b )

projection of one vector onto the plane transverse to another vector

Parameters

v_a	vector \(\vec{v}_a\)
v_b	vector \(\vec{v}_b\)

Returns

the vector \(\vec{v}_a\) projected onto the plane transverse to \(\vec{v}_b\), if the calculation is successful

VectorAngle()

std::optional< double > iguana::physics::tools::VectorAngle	(	ROOT::Math::XYZVector const	v_a,
		ROOT::Math::XYZVector const	v_b )

calculate the angle between two vectors

Parameters

v_a	vector \(\vec{v}_a\)
v_b	vector \(\vec{v}_b\)

Returns

the angle between \(\vec{v}_a\) and \(\vec{v}_b\), if the calculation is successful

Variable Documentation

UNDEF

double const iguana::physics::tools::UNDEF {-10000}

a value used when some calculation fails

Definition at line 12 of file Tools.h.