The class calculates the helicity amplitude of semi-tauonic B decays including new physics effects based on [M. More...

#include <EvtBSemiTauonicHelicityAmplitudeCalculator.h>

Public Member Functions
	EvtBSemiTauonicHelicityAmplitudeCalculator ()
	The default constructor. More...

	EvtBSemiTauonicHelicityAmplitudeCalculator (const double rho12, const double rhoA12, const double ffR11, const double ffR21, const double AS1, const double AR3, const double bottomMass, const double charmMass, const EvtComplex &CV1, const EvtComplex &CV2, const EvtComplex &CS1, const EvtComplex &CS2, const EvtComplex &CT, const double parentMass, const double DMass, const double DstarMass)
	The constructor with HQET form factor parameters, Wilson coefficients of new physics contributions and parent B, daughter D(*) meson masses. More...

virtual	~EvtBSemiTauonicHelicityAmplitudeCalculator ()
	The destructor. More...

EvtComplex	helAmp (double mtau, int tauhel, int Dhel, double w, double costau) const
	The function calculates the helicity amplitude. More...

EvtComplex	helAmp (const EvtComplex &CV1, const EvtComplex &CV2, const EvtComplex &CS1, const EvtComplex &CS2, const EvtComplex &CT, double mtau, int tauhel, int Dhel, double w, double costau) const
	The function calculates helicity amplitudes with given Wilson coefficients. More...

double	Lep (const double mtau, int tauhel, int whel, double q2, double costau) const
	The function to calculate the Leptonic Amplitudes for B->D*taunu decay of the vector type contribution. More...

double	Lep (const double mtau, int tauhel, double q2, double costau) const
	The function to calculate the Leptonic Amplitudes for B->Dtaunu decay of the scalar type contribution. More...

double	Lep (const double mtau, int tauhel, int whel1, int whel2, double q2, double costau) const
	The function to calculate the Leptonic Amplitudes for B->D*taunu decay of the tensor type contribution. More...

double	HadV1 (int Dhel, int whel, double w) const
	The function to calculate the Hadronic Amplitudes of left handed (V-A) type contribution. More...

double	HadV2 (int Dhel, int whel, double w) const
	The function to calculate the Hadronic Amplitudes of right handed (V+A) type contribution. More...

double	HadS1 (int Dhel, double w) const
	The function to calculate the Hadronic Amplitudes of scalar (S+P) type contribution. More...

double	HadS2 (int Dhel, double w) const
	The function to calculate the Hadronic Amplitudes of scalar (S-P) type contribution. More...

double	HadT (int Dhel, int whel1, int whel2, double w) const
	The function to calculate the Hadronic Amplitudes of tensor type contribution. More...

double	helampSM (double mtau, int tauhel, int Dhel, double w, double costau) const
	Helicity Amplitudes of SM (left handed) contribution. More...

double	helampV1 (double mtau, int tauhel, int Dhel, double w, double costau) const
	Helicity Amplitudes of left handed (V-A) contribution. More...

double	helampV2 (double mtau, int tauhel, int Dhel, double w, double costau) const
	Helicity Amplitudes of right handed (V+A) contribution. More...

double	helampS1 (double mtau, int tauhel, int Dhel, double w, double costau) const
	Helicity Amplitudes of scalar (S+P) type contribution. More...

double	helampS2 (double mtau, int tauhel, int Dhel, double w, double costau) const
	Helicity Amplitudes of scalar (S-P) type contribution. More...

double	helampT (double mtau, int tauhel, int Dhel, double w, double costau) const
	Helicity Amplitudes of tensor type contribution. More...

double	eta (int whel) const
	The metric factor. More...

double	hp (double w) const
	HQET D vector form factor h_+(w). More...

double	hm (double w) const
	HQET D vector form factor h_-(w). More...

double	hA1 (double w) const
	HQET D* axial vector form factor h_{A1}(w). More...

double	hV (double w) const
	HQET D* axial vector form factor h_V(w). More...

double	hA2 (double w) const
	HQET D* axial vector form factor h_{A2}(w). More...

double	hA3 (double w) const
	HQET D* axial vector form factor h_{A3}(w). More...

double	hS (double w) const
	D scalar form factor h_S(w) in terms of vector form factors. More...

double	hP (double w) const
	D* pseudo scalar form factor h_P(w) in terms of axial vector form factors. More...

double	hT (double w) const
	D tensor form factor h_T(w) in terms of vector form factors. More...

double	hT1 (double w) const
	D* tensor form factor h_{T1}(w) in terms of axial vector form factors. More...

double	hT2 (double w) const
	D* tensor form factor h_{T2}(w). More...

double	hT3 (double w) const
	D* tensor form factor h_{T3}(w). More...

double	z (double w) const
	CLN form factor z. More...

double	ffV1 (double w) const
	CLN form factor V1. More...

double	ffS1 (double w) const
	CLN form factor S1. More...

double	ffA1 (double w) const
	CLN form factor A1. More...

double	ffR1 (double w) const
	CLN form factor R1. More...

double	ffR2 (double w) const
	CLN form factor R2. More...

double	ffR3 (double w) const
	CLN form factor R3. More...

double	ffV11 () const
	Form factor normalization factor for B->Dlnu. More...

double	ffA11 () const
	Form factor normalization factor for B->D*lnu. More...

double	dS1 (double w) const
	HQET correction factor for the scalar form factor for B->Dtaunu. More...

double	dR3 (double w) const
	HQET correction factor for the scalar form factor for B->D*taunu. More...

double	aS1 () const
	HQET correction factor for the uncertainty of 1/m_Q correction. More...

double	aR3 () const
	HQET correction factor for the uncertainty of 1/m_Q correction. More...

double	mD (int Dhel) const
	Daughter D(*) meson mass. More...

double	r (int Dhel) const
	Ratio of the daughter meson mass to the parent meson. More...

double	rq () const
	Ratio of the charm quark mass to the charm quark mass.

double	v (double mtau, double q2) const
	Function to calculate the tau velocity. More...

double	q2 (int Dhel, double w) const
	Function to calculate the q^2 of the decay (square of l+nu invariant mass). More...

double	qh2 (int Dhel, double w) const
	Function to calculate the q^2 divided by the square of parent mass (m_B^2). More...

double	q2min (double mtau) const
	Minimum value of the q^2. More...

double	q2max (int Dhel) const
	Maximum value of the q^2. More...

double	wfunc (int Dhel, double q2) const
	Calculate the velocity transfer variable w. More...

double	wmin () const
	Minimum value of the velocity transfer variable w. More...

double	wmax (double mtau, int Dhel) const
	Maximum value of the velocity transfer variable w. More...

double	getRho12 () const
	parameter accessor More...

double	getRhoA12 () const
	Returns form factor parameter rho_A1^2. More...

double	getR11 () const
	Returns form factor parameter R_1(1). More...

double	getR21 () const
	Returns form factor parameter R_2(1). More...

double	getAS1 () const
	Returns form factor 1/m_Q correction factor a_S1. More...

double	getAR3 () const
	Returns form factor 1/m_Q correction factor a_R3. More...

double	getMB () const
	Returns the parent (B) meson mass. More...

double	getMD () const
	Returns the daughter scalar (D) meson mass. More...

double	getMDst () const
	Returns the daughter vector (D*) meson mass. More...

double	getMBottom () const
	Returns the bottom quark mass.

double	getMCharm () const
	Returns the charm quark mass.

EvtComplex	getCV1 () const
	Returns the Wilson coeffcient CV1. More...

EvtComplex	getCV2 () const
	Returns the Wilson coeffcient CV2. More...

EvtComplex	getCS1 () const
	Returns the Wilson coeffcient CS1. More...

EvtComplex	getCS2 () const
	Returns the Wilson coeffcient CS2. More...

EvtComplex	getCT () const
	Returns the Wilson coeffcient CT. More...

void	setRho12 (double v)
	Sets the form factor parameter rho_1^2. More...

void	setRhoA12 (double v)
	Sets the form factor parameter rho_A1^2. More...

void	setR11 (double v)
	Sets the form factor parameter R_1(1). More...

void	setR21 (double v)
	Sets the form factor parameter R_2(1). More...

void	setAS1 (double v)
	Sets the form factor 1/m_Q correction parameter a_S1. More...

void	setAR3 (double v)
	Sets the form factor 1/m_Q correction parameter a_R3. More...

void	setMB (double m)
	Sets the parent (B) meson mass. More...

void	setMD (double m)
	Sets the daughter scalar (D) meson mass. More...

void	setMDst (double m)
	Sets the daughter vector (D) meson mass. More...

void	setMBottom (double m)
	Returns the bottom quark mass.

void	setMCharm (double m)
	Returns the charm quark mass.

void	setCV1 (const EvtComplex &v)
	Sets the Wilson coeffcient CV1. More...

void	setCV2 (const EvtComplex &v)
	Sets the Wilson coeffcient CV2. More...

void	setCS1 (const EvtComplex &v)
	Sets the Wilson coeffcient CS1. More...

void	setCS2 (const EvtComplex &v)
	Sets the Wilson coeffcient CS2. More...

void	setCT (const EvtComplex &v)
	Sets the Wilson coeffcient CT. More...

Private Member Functions
bool	chkDhel (int Dhel) const
	sanity checkers More...

bool	chkwhel (int whel) const
	Function to check if whel is in the valid range. More...

bool	chktauhel (int tauhel) const
	Function to check if tauhel is in the valid range. More...

Private Attributes
double	m_rho12
	Form factor slope parameters rho_1^2. More...

double	m_rhoA12
	Form factor slope parameters rho_A1^2. More...

double	m_ffR11
	Form factor parameter R_1(1). More...

double	m_ffR21
	Form factor parameter R_2(1). More...

double	m_aS1
	1/mQ correcion factor a_S1. More...

double	m_aR3
	1/mQ correcion factor a_R3. More...

double	m_mB
	parent (B) meson mass. More...

double	m_mD
	daughter scalar (D) meson mass. More...

double	m_mDst
	daughter vector (D*) meson mass. More...

double	m_mBottom
	b quark mass (running mass at m_b scale), used for scalar form factor term

double	m_mCharm
	c quark mass (running mass at m_b scale), used for scalar form factor term )

EvtComplex	m_CV1
	Wilson coefficient CV1. More...

EvtComplex	m_CV2
	Wilson coefficient CV2. More...

EvtComplex	m_CS1
	Wilson coefficient CS1. More...

EvtComplex	m_CS2
	Wilson coefficient CS2. More...

EvtComplex	m_CT
	Wilson coefficient CT. More...

Detailed Description

The class calculates the helicity amplitude of semi-tauonic B decays including new physics effects based on [M.

Tanaka and R. Watanabe PRD87,034028(2013)].

The class implements helicity amplitude of the B->D*taunu and B->Dtaunu decays including new physics effects described in [M. Tanaka and R. Watanabe Phys. Rev. D87, 034028 (2013)]. The five possible new physics contributions are included: V1=left handed vector type (SM like), V2=right handed vector type, S1=scalar type (S+P), S2=scalar type (S-P), T=tensor type.

Definition at line 28 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

Constructor & Destructor Documentation

◆ ~EvtBSemiTauonicHelicityAmplitudeCalculator()

virtual ~EvtBSemiTauonicHelicityAmplitudeCalculator ( )

inlinevirtual

The destructor.

Definition at line 64 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

64 {};

Member Function Documentation

◆ aR3()

double aR3 ( ) const

inline

HQET correction factor for the uncertainty of 1/m_Q correction.

Returns: value of a_R3 set in the constructor or by setAR3().

Definition at line 361 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ aS1()

double aS1 ( ) const

inline

HQET correction factor for the uncertainty of 1/m_Q correction.

Returns: value of a_S1 set in the constructor or by setAS1().

Definition at line 356 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ eta()

double eta ( int whel ) const

inline

The metric factor.

Parameters

whel	helicity of the virtual vector boson {+1,0,1,2}.

Returns: metric factor for the helicity state

Definition at line 240 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ ffA11()

double ffA11 ( ) const

inline

Form factor normalization factor for B->D*lnu.

Returns: the normalization factor (=1). Fixed to 1 because it cancels in R(D(*)) and is not relevant to the decay distribution.

Definition at line 339 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ ffV11()

double ffV11 ( ) const

inline

Form factor normalization factor for B->Dlnu.

Returns: the normalization factor (=1). Fixed to 1 because it cancels in R(D(*)) and is not relevant to the decay distribution.

Definition at line 333 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ getAR3()

double getAR3 ( ) const

inline

Returns form factor 1/m_Q correction factor a_R3.

Definition at line 452 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ getAS1()

double getAS1 ( ) const

inline

Returns form factor 1/m_Q correction factor a_S1.

Definition at line 449 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ getCS1()

EvtComplex getCS1 ( ) const

inline

Returns the Wilson coeffcient CS1.

Definition at line 476 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ getCS2()

EvtComplex getCS2 ( ) const

inline

Returns the Wilson coeffcient CS2.

Definition at line 479 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ getCT()

EvtComplex getCT ( ) const

inline

Returns the Wilson coeffcient CT.

Definition at line 482 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ getCV1()

EvtComplex getCV1 ( ) const

inline

Returns the Wilson coeffcient CV1.

Definition at line 470 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ getCV2()

EvtComplex getCV2 ( ) const

inline

Returns the Wilson coeffcient CV2.

Definition at line 473 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ getMB()

double getMB ( ) const

inline

Returns the parent (B) meson mass.

Definition at line 455 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ getMD()

double getMD ( ) const

inline

Returns the daughter scalar (D) meson mass.

Definition at line 458 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ getMDst()

double getMDst ( ) const

inline

Returns the daughter vector (D*) meson mass.

Definition at line 461 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ getR11()

double getR11 ( ) const

inline

Returns form factor parameter R_1(1).

Definition at line 443 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ getR21()

double getR21 ( ) const

inline

Returns form factor parameter R_2(1).

Definition at line 446 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ getRho12()

double getRho12 ( ) const

inline

parameter accessor

Returns form factor parameter rho_1^2.

Definition at line 437 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ getRhoA12()

double getRhoA12 ( ) const

inline

Returns form factor parameter rho_A1^2.

Definition at line 440 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ q2max()

double q2max ( int Dhel ) const

inline

Maximum value of the q^2.

Parameters

Dhel	helicity of the D() meson in the rest frame of the parent meson {+1,0,-1} for D and 2 for D.

Returns: calcualted q^2 maximum.

Definition at line 413 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ q2min()

double q2min ( double mtau ) const

inline

Minimum value of the q^2.

Parameters

mtau	daughter lepton mass.

Returns: calcualted q^2 minimum.

Definition at line 407 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ r()

double r ( int Dhel ) const

inline

Ratio of the daughter meson mass to the parent meson.

Parameters

Dhel	helicity of the D() meson in the rest frame of the parent meson {+1,0,-1} for D and 2 for D.

Returns: daughter D(*) meson mass divided by the parent meson mass.

Definition at line 373 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ setAR3()

void setAR3 ( double v )

inline

Sets the form factor 1/m_Q correction parameter a_R3.

Definition at line 500 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ setAS1()

void setAS1 ( double v )

inline

Sets the form factor 1/m_Q correction parameter a_S1.

Definition at line 497 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ setCS1()

void setCS1 ( const EvtComplex & v )

inline

Sets the Wilson coeffcient CS1.

Definition at line 524 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ setCS2()

void setCS2 ( const EvtComplex & v )

inline

Sets the Wilson coeffcient CS2.

Definition at line 527 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ setCT()

void setCT ( const EvtComplex & v )

inline

Sets the Wilson coeffcient CT.

Definition at line 530 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ setCV1()

void setCV1 ( const EvtComplex & v )

inline

Sets the Wilson coeffcient CV1.

Definition at line 518 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ setCV2()

void setCV2 ( const EvtComplex & v )

inline

Sets the Wilson coeffcient CV2.

Definition at line 521 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ setMB()

void setMB ( double m )

inline

Sets the parent (B) meson mass.

Definition at line 503 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ setMD()

void setMD ( double m )

inline

Sets the daughter scalar (D) meson mass.

Definition at line 506 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ setMDst()

void setMDst ( double m )

inline

Sets the daughter vector (D) meson mass.

Definition at line 509 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ setR11()

void setR11 ( double v )

inline

Sets the form factor parameter R_1(1).

Definition at line 491 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ setR21()

void setR21 ( double v )

inline

Sets the form factor parameter R_2(1).

Definition at line 494 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ setRho12()

void setRho12 ( double v )

inline

Sets the form factor parameter rho_1^2.

Definition at line 485 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ setRhoA12()

void setRhoA12 ( double v )

inline

Sets the form factor parameter rho_A1^2.

Definition at line 488 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ wfunc()

double wfunc	(	int	Dhel,
		double	q2
	)		const

inline

Calculate the velocity transfer variable w.

Parameters

Dhel	helicity of the D() meson in the rest frame of the parent meson {+1,0,-1} for D and 2 for D.
q2	q^2 of the decay (square of l+nu invariant mass).

Returns: calcualted w.

Definition at line 420 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ wmax()

double wmax	(	double	mtau,
		int	Dhel
	)		const

inline

Maximum value of the velocity transfer variable w.

Parameters

mtau	daughter lepton mass.
Dhel	helicity of the D() meson in the rest frame of the parent meson {+1,0,-1} for D and 2 for D.

Returns: the calculated maximum of the w.

Definition at line 432 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ wmin()

double wmin ( ) const

inline

Minimum value of the velocity transfer variable w.

Returns: the minimum of the w (= 1).

Definition at line 425 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

Member Data Documentation

◆ m_aR3

double m_aR3

private

1/mQ correcion factor a_R3.

Definition at line 556 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ m_aS1

double m_aS1

private

1/mQ correcion factor a_S1.

Definition at line 553 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ m_CS1

EvtComplex m_CS1

private

Wilson coefficient CS1.

Definition at line 580 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ m_CS2

EvtComplex m_CS2

private

Wilson coefficient CS2.

Definition at line 583 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ m_CT

EvtComplex m_CT

private

Wilson coefficient CT.

Definition at line 586 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ m_CV1

EvtComplex m_CV1

private

Wilson coefficient CV1.

Definition at line 574 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ m_CV2

EvtComplex m_CV2

private

Wilson coefficient CV2.

Definition at line 577 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ m_ffR11

double m_ffR11

private

Form factor parameter R_1(1).

Definition at line 547 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ m_ffR21

double m_ffR21

private

Form factor parameter R_2(1).

Definition at line 550 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ m_mB

double m_mB

private

parent (B) meson mass.

Definition at line 559 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ m_mD

double m_mD

private

daughter scalar (D) meson mass.

Definition at line 562 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ m_mDst

double m_mDst

private

daughter vector (D*) meson mass.

Definition at line 565 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ m_rho12

double m_rho12

private

Form factor slope parameters rho_1^2.

Definition at line 541 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

◆ m_rhoA12

double m_rhoA12

private

Form factor slope parameters rho_A1^2.

Definition at line 544 of file EvtBSemiTauonicHelicityAmplitudeCalculator.h.

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

generators/evtgen/models/include/EvtBSemiTauonicHelicityAmplitudeCalculator.h
generators/evtgen/models/src/EvtBSemiTauonicHelicityAmplitudeCalculator.cc

Public Member Functions

Private Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

◆ ~EvtBSemiTauonicHelicityAmplitudeCalculator()

Member Function Documentation

◆ aR3()

◆ aS1()

◆ eta()

◆ ffA11()

◆ ffV11()

◆ getAR3()

◆ getAS1()

◆ getCS1()

◆ getCS2()

◆ getCT()

◆ getCV1()

◆ getCV2()

◆ getMB()

◆ getMD()

◆ getMDst()

◆ getR11()

◆ getR21()

◆ getRho12()

◆ getRhoA12()

◆ q2max()

◆ q2min()

◆ r()

◆ setAR3()

◆ setAS1()

◆ setCS1()

◆ setCS2()

◆ setCT()

◆ setCV1()

◆ setCV2()

◆ setMB()

◆ setMD()

◆ setMDst()

◆ setR11()

◆ setR21()

◆ setRho12()

◆ setRhoA12()

◆ wfunc()

◆ wmax()

◆ wmin()

Member Data Documentation

◆ m_aR3

◆ m_aS1

◆ m_CS1

◆ m_CS2

◆ m_CT

◆ m_CV1

◆ m_CV2

◆ m_ffR11

◆ m_ffR21

◆ m_mB

◆ m_mD

◆ m_mDst

◆ m_rho12

◆ m_rhoA12