Physics analysis helper for filtering and reconstructing reactions from HIPO data. More...

#include <reaction.h>

Public Member Functions
	reaction ()
	Default constructor. More...

	reaction (const char *file)
	Construct a reaction from a HIPO file (no filter, no beam setup). More...

	reaction (const char *file, std::initializer_list< std::tuple< int, int > > desc)
	Construct a reaction with a particle filter. More...

	reaction (const char *file, double benergy, std::initializer_list< std::tuple< int, int > > desc)
	Construct a reaction with beam energy and particle filter. More...

	reaction (const char file, double benergy, int pids, int *count, int length)
	Construct a reaction with beam energy and C-style filter arrays. More...

virtual	~reaction ()

fizika::lorentz4 &	cm ()

void	init_filter (std::initializer_list< std::tuple< int, int > > desc)
	Initialize the particle filter from PID/count pairs. More...

fizika::lorentz4	get (std::initializer_list< std::tuple< int, int, int, double > > desc)
	Reconstruct a Lorentz vector from a particle combination. More...

fizika::lorentz4	get (int signs, int pids, int skips, double masses, int length)
	Reconstruct a Lorentz vector from arrays of particle parameters. More...

bool	next ()
	Advance to the next event and read all banks. More...

void	get_vector (fizika::lorentz4 &vec, double mass, hipo::bank &b, int order, int ind_px, int ind_py, int ind_pz)
	Fill a Lorentz vector from a bank row's momentum columns and a given mass. More...

bool	is_valid ()
	Check if the current event passes the particle filter. More...

int	countpid (int pid)
	Count particles with the given PID that pass status cuts. More...

int	index (int pid, int skip)
	Find the row index of the Nth particle with the given PID. More...

std::vector< hipo::bank > &	getBanks ()

fizika::lorentz4 &	beam ()

fizika::lorentz4 &	target ()

Detailed Description

Physics analysis helper for filtering and reconstructing reactions from HIPO data.

Reads REC::Particle banks and provides particle identification filtering, Lorentz vector reconstruction, and exclusive/inclusive reaction selection. Beam and target kinematics are configurable.

Definition at line 37 of file reaction.h.

Constructor & Destructor Documentation

◆ reaction() [1/5]

fizika::reaction::reaction ( )

inline

Default constructor.

Definition at line 62 of file reaction.h.

◆ reaction() [2/5]

fizika::reaction::reaction ( const char * file )

inline

Construct a reaction from a HIPO file (no filter, no beam setup).

Parameters

file	Path to the HIPO file

Definition at line 65 of file reaction.h.

◆ reaction() [3/5]

fizika::reaction::reaction	(	const char *	file,
		std::initializer_list< std::tuple< int, int > >	desc
	)

inline

Construct a reaction with a particle filter.

Parameters

file	Path to the HIPO file
desc	Initializer list of (pid, count) tuples defining the filter

Definition at line 71 of file reaction.h.

◆ reaction() [4/5]

fizika::reaction::reaction	(	const char *	file,
		double	benergy,
		std::initializer_list< std::tuple< int, int > >	desc
	)

inline

Construct a reaction with beam energy and particle filter.

Parameters

file	Path to the HIPO file
benergy	Beam energy in GeV
desc	Initializer list of (pid, count) tuples defining the filter

Definition at line 79 of file reaction.h.

◆ reaction() [5/5]

fizika::reaction::reaction	(	const char *	file,
		double	benergy,
		int *	pids,
		int *	count,
		int	length
	)

inline

Construct a reaction with beam energy and C-style filter arrays.

Parameters

file	Path to the HIPO file
benergy	Beam energy in GeV
pids	Array of particle IDs
count	Array of required counts per PID
length	Number of entries in pids and count arrays

Definition at line 93 of file reaction.h.

◆ ~reaction()

virtual fizika::reaction::~reaction ( )

inlinevirtual

Definition at line 105 of file reaction.h.

Member Function Documentation

◆ beam()

fizika::lorentz4& fizika::reaction::beam ( )

inline

Returns: Reference to the beam Lorentz vector.

Definition at line 223 of file reaction.h.

◆ cm()

fizika::lorentz4& fizika::reaction::cm ( )

inline

Returns: Reference to the center-of-mass Lorentz vector.

Definition at line 109 of file reaction.h.

◆ countpid()

int fizika::reaction::countpid ( int pid )

inline

Count particles with the given PID that pass status cuts.

Parameters

pid	Particle ID to count

Definition at line 192 of file reaction.h.

◆ get() [1/2]

fizika::lorentz4 fizika::reaction::get	(	int *	signs,
		int *	pids,
		int *	skips,
		double *	masses,
		int	length
	)

inline

Reconstruct a Lorentz vector from arrays of particle parameters.

Parameters

signs	Array of signs (+1 or -1)
pids	Array of particle IDs
skips	Array of occurrence indices
masses	Array of assumed masses
length	Number of particles

Definition at line 148 of file reaction.h.

◆ get() [2/2]

fizika::lorentz4 fizika::reaction::get ( std::initializer_list< std::tuple< int, int, int, double > > desc )

inline

Reconstruct a Lorentz vector from a particle combination.

Parameters

desc	Initializer list of (sign, pid, skip, mass) tuples. sign: +1 to add, -1 to subtract. skip: occurrence index.

Returns: Combined Lorentz vector

Definition at line 129 of file reaction.h.

◆ get_vector()

void fizika::reaction::get_vector	(	fizika::lorentz4 &	vec,
		double	mass,
		hipo::bank &	b,
		int	order,
		int	ind_px,
		int	ind_py,
		int	ind_pz
	)

inline

Fill a Lorentz vector from a bank row's momentum columns and a given mass.

Definition at line 173 of file reaction.h.

◆ getBanks()

std::vector<hipo::bank>& fizika::reaction::getBanks ( )

inline

Returns: Reference to the vector of banks.

Definition at line 221 of file reaction.h.

◆ index()

int fizika::reaction::index	(	int	pid,
		int	skip
	)

inline

Find the row index of the Nth particle with the given PID.

Parameters

pid	Particle ID to search for
skip	Occurrence index (0 = first match)

Returns: Row index or -1 if not found

Definition at line 207 of file reaction.h.

◆ init_filter()

void fizika::reaction::init_filter ( std::initializer_list< std::tuple< int, int > > desc )

inline

Initialize the particle filter from PID/count pairs.

Parameters

desc	Initializer list of (pid, count) tuples

Definition at line 113 of file reaction.h.

◆ is_valid()

bool fizika::reaction::is_valid ( )

inline

Check if the current event passes the particle filter.

Returns: True if all required PIDs have the required counts

Definition at line 179 of file reaction.h.

◆ next()

bool fizika::reaction::next ( )

inline

Advance to the next event and read all banks.

Returns: False at end of file

Definition at line 164 of file reaction.h.

◆ target()

fizika::lorentz4& fizika::reaction::target ( )

inline

Returns: Reference to the target Lorentz vector.

Definition at line 225 of file reaction.h.

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

hipo4/reaction.h

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

◆ reaction() [1/5]

◆ reaction() [2/5]

◆ reaction() [3/5]

◆ reaction() [4/5]

◆ reaction() [5/5]

◆ ~reaction()

Member Function Documentation

◆ beam()

◆ cm()

◆ countpid()

◆ get() [1/2]

◆ get() [2/2]

◆ get_vector()

◆ getBanks()

◆ index()

◆ init_filter()

◆ is_valid()

◆ next()

◆ target()