hardware Namespace Reference

C++ namespace for common physics functions. More...

Functions
float	DeltaPhi (float phi1, float phi2)
	Calculate the difference in \(\phi\). More...
float	DeltaR (ROOT::Math::PtEtaPhiMVector v1, ROOT::Math::PtEtaPhiMVector v2)
	Calculate \(\Delta R\) between two vectors. More...
template<class T1 , class T2 >
float	DeltaR (T1 in1, T2 in2)
	Calculate \(\Delta R\) between two objects. More...
RVec< float >	HadamardProduct (RVec< float > v1, RVec< float > v2)
	Hadamard product of two vectors (v3[i] = v1[i]*v2[i]) More...
RVec< float >	HadamardProduct (RVec< float > v1, RVec< RVec< float >> v2, int v2subindex)
	Hadamard product of two vectors (v3[i] = v1[i]*v2[i][v2subindex]) where v2 has multiple sub-elements, only one of which should be accessed (at index of v2subindex). More...
double	InvariantMass (RVec< ROOT::Math::PtEtaPhiMVector > vects)
	Calculates the invariant mass of a vector of Lorentz vectors (ROOT::Math::PtEtaPhiMVector). Note that this is an alternative to ROOT::VecOps::InvariantMasses() which does not need the intermediate Lorentz vector. More...
TH1 *	LoadHist (std::string filename, std::string histname, bool inTIMBER=true)
	Generically open a histogram from a file into memory (closing the file in the process). More...
RVec< float >	MultiHadamardProduct (RVec< float > v1, RVec< RVec< float >> Multiv2)
	Hadamard product of a base vector and a list of N more vectors (vout[i] = v1[i]*v2[i]*v3[i]...). More...
RVec< float >	MultiHadamardProduct (RVec< float > v1, RVec< RVec< RVec< float >>> Multiv2, int v2subindex)
	Hadamard product of a base vector and a list of N more vectors (vout[i] = v1[i]*v2[i][v2subindex]*v3[i][v2subindex]...) where v<N> has multiple sub-elements, only one of which should be accessed (at index of v2subindex). More...
TFile *	Open (std::string file, bool inTIMBER=true, const char *option="READ")
	Open a ROOT file inside the TIMBER path. Thsi function essentially just does the char + string formatting for you. More...
ROOT::Math::PtEtaPhiMVector	TLvector (float pt, float eta, float phi, float m)
	Create a ROOT::Math::PtEtaPhiMVector. More...
RVec< ROOT::Math::PtEtaPhiMVector >	TLvector (RVec< float > pt, RVec< float > eta, RVec< float > phi, RVec< float > m)
	Create a vector of ROOT::Math::PtEtaPhiMVectors. More...
template<class T >
ROOT::Math::PtEtaPhiMVector	TLvector (T obj)
	Create a ROOT::Math::PtEtaPhiMVectors. More...
template<class T >
RVec< ROOT::Math::PtEtaPhiMVector >	TLvector (std::vector< T > objs)
	Create a vector of ROOT::Math::PtEtaPhiMVectors. More...
template<class T >
RVec< RVec< T > >	Transpose (RVec< RVec< T >> v)
	Transpose a vector so that output[j][i] = input[i][j]. More...
float	TransverseMass (float MET_pt, float obj_pt, float MET_phi, float obj_phi)
	Calculate the transverse mass from MET \(p_T\) and \(\eta\) and an object's \(p_T\) and \(\eta\). More...

Detailed Description

C++ namespace for common physics functions.

Function Documentation

DeltaPhi()

float DeltaPhi	(	float	phi1,
		float	phi2
	)

Calculate the difference in \(\phi\).

Parameters

phi1
phi2

Returns

float Difference in \(\phi\).

DeltaR() [1/2]

float DeltaR	(	ROOT::Math::PtEtaPhiMVector	v1,
		ROOT::Math::PtEtaPhiMVector	v2
	)

Calculate \(\Delta R\) between two vectors.

Parameters

v1
v2

Returns

float

DeltaR() [2/2]

float hardware::DeltaR	(	T1	in1,
		T2	in2
	)

Calculate \(\Delta R\) between two objects.

Parameters

in1
in2

Returns

float

HadamardProduct() [1/2]

RVec< float > HadamardProduct	(	RVec< float >	v1,
		RVec< float >	v2
	)

Hadamard product of two vectors (v3[i] = v1[i]*v2[i])

Parameters

v1
v2

Returns

RVec<float>

HadamardProduct() [2/2]

RVec< float > HadamardProduct	(	RVec< float >	v1,
		RVec< RVec< float >>	v2,
		int	v2subindex
	)

Hadamard product of two vectors (v3[i] = v1[i]*v2[i][v2subindex]) where v2 has multiple sub-elements, only one of which should be accessed (at index of v2subindex).

Parameters

v1
v2
v2subindex

Returns

RVec<float>

InvariantMass()

double InvariantMass

(

RVec< ROOT::Math::PtEtaPhiMVector >

vects

)

Calculates the invariant mass of a vector of Lorentz vectors (ROOT::Math::PtEtaPhiMVector). Note that this is an alternative to ROOT::VecOps::InvariantMasses() which does not need the intermediate Lorentz vector.

Parameters

vects

Returns

double

LoadHist()

TH1 * LoadHist	(	std::string	filename,
		std::string	histname,
		bool	inTIMBER = true
	)

Generically open a histogram from a file into memory (closing the file in the process).

Parameters

filename
histname
inTIMBER	If file is in TIMBERPATH. Defaults to true.

Returns

TH1*

MultiHadamardProduct() [1/2]

RVec< float > MultiHadamardProduct	(	RVec< float >	v1,
		RVec< RVec< float >>	Multiv2
	)

Hadamard product of a base vector and a list of N more vectors (vout[i] = v1[i]*v2[i]*v3[i]...).

Parameters

v1
Multiv2

Returns

RVec<float>

MultiHadamardProduct() [2/2]

RVec< float > MultiHadamardProduct	(	RVec< float >	v1,
		RVec< RVec< RVec< float >>>	Multiv2,
		int	v2subindex
	)

Hadamard product of a base vector and a list of N more vectors (vout[i] = v1[i]*v2[i][v2subindex]*v3[i][v2subindex]...) where v<N> has multiple sub-elements, only one of which should be accessed (at index of v2subindex).

Parameters

v1
Multiv2
v2subindex

Returns

RVec<float>

Open()

TFile * Open	(	std::string	file,
		bool	inTIMBER = true,
		const char *	option = "READ"
	)

Open a ROOT file inside the TIMBER path. Thsi function essentially just does the char + string formatting for you.

Parameters

file	Ex. TIMBER/data/example.root
inTIMBER	If file is in TIMBERPATH. Defaults to true.
option	Defaults to "READ" for read-only.

Returns

TFile*

TLvector() [1/4]

ROOT::Math::PtEtaPhiMVector TLvector	(	float	pt,
		float	eta,
		float	phi,
		float	m
	)

Create a ROOT::Math::PtEtaPhiMVector.

Parameters

pt
eta
phi
m

Returns

ROOT::Math::PtEtaPhiMVector

TLvector() [2/4]

RVec< ROOT::Math::PtEtaPhiMVector > TLvector	(	RVec< float >	pt,
		RVec< float >	eta,
		RVec< float >	phi,
		RVec< float >	m
	)

Create a vector of ROOT::Math::PtEtaPhiMVectors.

Parameters

pt
eta
phi
m

Returns

RVec<ROOT::Math::PtEtaPhiMVector>

TLvector() [3/4]

ROOT::Math::PtEtaPhiMVector hardware::TLvector

(

T

obj

)

Create a ROOT::Math::PtEtaPhiMVectors.

Parameters

obj

Returns

ROOT::Math::PtEtaPhiMVector

TLvector() [4/4]

RVec<ROOT::Math::PtEtaPhiMVector> hardware::TLvector

(

std::vector< T >

objs

)

Create a vector of ROOT::Math::PtEtaPhiMVectors.

Parameters

objs

Returns

RVec<ROOT::Math::PtEtaPhiMVector>

Transpose()

RVec<RVec<T> > hardware::Transpose

(

RVec< RVec< T >>

v

)

Transpose a vector so that output[j][i] = input[i][j].

Parameters

v

Returns

RVec<RVec<T>>

TransverseMass()

float TransverseMass	(	float	MET_pt,
		float	obj_pt,
		float	MET_phi,
		float	obj_phi
	)

Calculate the transverse mass from MET \(p_T\) and \(\eta\) and an object's \(p_T\) and \(\eta\).

Parameters

MET_pt
obj_pt
MET_phi
obj_phi

Returns

float