cbl::modelling::threept Namespace Reference

The namespace of the three-point correlation function modelling More...

Classes
struct	STR_data_model_threept
	the structure STR_data_model_threept More...
class	Modelling_ThreePointCorrelation
	The class Modelling_ThreePointCorrelation. More...
class	Modelling_ThreePointCorrelation_angular_connected
	The class Modelling_ThreePointCorrelation_angular_connected. More...
class	Modelling_ThreePointCorrelation_angular_reduced
	The class Modelling_ThreePointCorrelation_angular_reduced. More...
class	Modelling_ThreePointCorrelation_comoving_connected
	The class Modelling_ThreePointCorrelation_comoving_connected. More...
class	Modelling_ThreePointCorrelation_comoving_reduced
	The class Modelling_ThreePointCorrelation_comoving_reduced. More...

Functions
std::vector< double >	zeta_RSD (const std::vector< double > theta, const std::shared_ptr< void > inputs, std::vector< double > &parameter)
	model for the connected three-point correlation function More...
std::vector< double >	Q_nonlinear_localbias (const std::vector< double > theta, const std::shared_ptr< void > inputs, std::vector< double > &parameter)
	model for the reduced three-point correlation function More...
std::vector< double >	Q_nonlinear_nonlocalbias (const std::vector< double > theta, const std::shared_ptr< void > inputs, std::vector< double > &parameter)
	model for the reduced three-point correlation function with non-local contributions More...
std::vector< double >	Q_nonlinear_nonlocalbias_alpha (const std::vector< double > theta, const std::shared_ptr< void > inputs, std::vector< double > &parameter)
	model for the reduced three-point correlation function with non-local contributions with alpha shift on Pk More...

Detailed Description

The namespace of the three-point correlation function modelling

The modelling::threept namespace contains all the functions and classes to model the three-point correlation function

Function Documentation

Q_nonlinear_localbias()

std::vector< double > cbl::modelling::threept::Q_nonlinear_localbias	(	const std::vector< double >	theta,
		const std::shared_ptr< void >	inputs,
		std::vector< double > &	parameter
	)

model for the reduced three-point correlation function

The function computes:

\[ Q_{NL, lb} = \frac{1}{b_1}\left( Q_{DM}+\frac{b_2}{b_1} \right) \]

the model has 6 parameters:

• \(b_1\) the linear bias
• \(b_2\) the non-linear bias

the dark matter reduced three-point correlation function is fixed and provided in input

Parameters

theta	the scale at which the model is computed
inputs	pointer to the structure that contains the dark matter two-point correlation function
parameter	6D vector containing the input parameters

Returns

the reduced three-point correlation function

Definition at line 48 of file ModelFunction_ThreePointCorrelation_comoving_reduced.cpp.

Q_nonlinear_nonlocalbias()

std::vector< double > cbl::modelling::threept::Q_nonlinear_nonlocalbias	(	const std::vector< double >	theta,
		const std::shared_ptr< void >	inputs,
		std::vector< double > &	parameter
	)

model for the reduced three-point correlation function with non-local contributions

The function computes:

\[ Q_{NL, lb} = \frac{1}{b_1}\left( Q_{DM}+\frac{b_2}{b_1} + g_2 Q_{nl}\right) \]

the model has 6 parameters:

• \(b_1\) the linear bias
• \(b_2\) the non-linear bias
• \(g_2\) the non-local parameter

Parameters

theta	the scale at which the model is computed
inputs	pointer to the structure that contains the galaxy matter three-point correlation function
parameter	6D vector containing the input parameters

Returns

the reduced three-point correlation function

Definition at line 71 of file ModelFunction_ThreePointCorrelation_comoving_reduced.cpp.

Q_nonlinear_nonlocalbias_alpha()

std::vector< double > cbl::modelling::threept::Q_nonlinear_nonlocalbias_alpha	(	const std::vector< double >	theta,
		const std::shared_ptr< void >	inputs,
		std::vector< double > &	parameter
	)

model for the reduced three-point correlation function with non-local contributions with alpha shift on Pk

The function computes:

\[ Q_{NL, lb} = \frac{1}{b_1}\left( Q_{DM}+\frac{b_2}{b_1} + g_2 Q_{nl}\right) \]

the model has 6 parameters:

• \(b_1\) the linear bias
• \(b_2\) the non-linear bias
• \(g_2\) the non-local parameter
• \(\alpha\) the shift

Parameters

theta	the scale at which the model is computed
inputs	pointer to the structure that contains the galaxy matter three-point correlation function
parameter	6D vector containing the input parameters

Returns

the reduced three-point correlation function

Definition at line 95 of file ModelFunction_ThreePointCorrelation_comoving_reduced.cpp.

zeta_RSD()

std::vector< double > cbl::modelling::threept::zeta_RSD	(	const std::vector< double >	theta,
		const std::shared_ptr< void >	inputs,
		std::vector< double > &	parameter
	)

model for the connected three-point correlation function

Model for the connected three-point correlation function described in Slepian & Eisenstein (2017) and implemented in cbl::cosmology::Cosmology::zeta_RSD

the model has 4 parameters:

• \( b_1\)
• \( b_2\)
• \( b_t\)
• \( \beta = f/b_1\)

the dark matter two-point correlation function is fixed and provided in input

Parameters

theta	the scale at which the model is computed
inputs	pointer to the structure that contains the dark matter power spectrum
parameter	4D vector containing the input parameters

Returns

the redshift space monopole of the connected three-point correlation function

Definition at line 49 of file ModelFunction_ThreePointCorrelation_comoving_connected.cpp.