ColorFull::Quark_line Class Reference

#include <Quark_line.h>

Public Member Functions
	Quark_line (const std::string str)
	Quark_line ()
void	read_in_Quark_line (std::string filename)
void	write_out_Quark_line (std::string filename) const
int	at (int j) const
uint	size () const
void	clear ()
bool	empty () const
void	normal_order ()
void	erase (int i)
void	conjugate ()
void	append (int p)
void	append (const std::vector< int > &in_ql)
void	prepend (int p)
void	prepend (std::vector< int > in_ql)
void	insert (int j, int p)
Quark_line	before (int j) const
Quark_line	after (int j) const
std::pair< Quark_line, Quark_line >	split_Quark_line (int j1, int j2) const
int	smallest (const Quark_line &Ql1, const Quark_line &Ql2) const
void	contract_neighboring_gluons (int j)
void	contract_neighboring_gluons ()
void	contract_next_neighboring_gluons (int j)
void	contract_next_neighboring_gluons ()

Public Attributes
quark_line	ql
Polynomial	Poly
bool	open

Detailed Description

A class to contain one quark-line with gluons attached multiplying a Polynomial, Poly. The partons are ordered as {q,g1,g2...gn,qbar} for an open quark-line containing a q and a qbar, or (g1,g2...gn) for a closed quark-line with only gluons. The parton numbers are stored as components in a vector, a quark_line, whereas the member open contains information about it the quark-line is closed as a trace (true) or open, false.

Constructor & Destructor Documentation

Quark_line() [1/2]

ColorFull::Quark_line::Quark_line

(

const std::string

str

)

Constructor used to set the color structure using a string. The string should be of form Polynomial*quark_line, used as "Quark_line Ql("5*TR*Nc^2 {1,6,7,2}");" for an open Quark_line with a quark with number 1, two gluons with number 6 and 7, and a qbar with number 2. For a closed Quark_line with 3 gluons the syntax is "Quark_line Ql("(1,2,3)");". The integers should be positive. The Polynomial should be in such a shape that it is readable by the Polynomial( std::string ) constructor.

Quark_line() [2/2]

ColorFull::Quark_line::Quark_line

(

)

Default constructor.

Member Function Documentation

after()

Quark_line ColorFull::Quark_line::after

(

int

j

)

const

Returns a Quark_line where the ql member is changed to contain only partons after place j.

append() [1/2]

void ColorFull::Quark_line::append ( int  p )

inline

Appends parton p to the Quark_line.

append() [2/2]

void ColorFull::Quark_line::append

(

const std::vector< int > &

in_ql

)

Appends a whole quark_line to the Quark_line.

at()

int ColorFull::Quark_line::at

(

int

j

)

const

Returns the parton at place j. For closed quark_lines j may be between -size and 2*size.

before()

Quark_line ColorFull::Quark_line::before

(

int

j

)

const

Returns a Quark_line where the ql member is changed to contain only partons before place j.

clear()

void ColorFull::Quark_line::clear ( )

inline

Erase information in quark_line ql.

conjugate()

void ColorFull::Quark_line::conjugate

(

)

Conjugates the Quark_line by reversing the quark_line ql and conjugating the Polynomial Poly.

contract_neighboring_gluons() [1/2]

void ColorFull::Quark_line::contract_neighboring_gluons

(

int

j

)

Contracts neighboring gluons in the Quark_line starting at j, only intended for closed Quark_lines.

contract_neighboring_gluons() [2/2]

void ColorFull::Quark_line::contract_neighboring_gluons

(

)

Contracts neighboring gluons in a Quark_line starting at place 0, and checking all neighbors, only intended for closed Quark_lines.

contract_next_neighboring_gluons() [1/2]

void ColorFull::Quark_line::contract_next_neighboring_gluons

(

int

j

)

Contracts neighboring and next to neighboring gluons in the Quark_line, starting at place j (i.e. checking gluon j and j+2). Also looks for new neighbors, only intended for closed Quark_lines.

contract_next_neighboring_gluons() [2/2]

void ColorFull::Quark_line::contract_next_neighboring_gluons

(

)

Contracts neighboring and next to neighboring gluons in the Quark_line, starting with contracting neighbors, only intended for closed Quark_lines.

empty()

bool ColorFull::Quark_line::empty ( ) const

inline

Is the quark_line empty?

erase()

void ColorFull::Quark_line::erase

(

int

i

)

To erase the parton at place i.

insert()

void ColorFull::Quark_line::insert	(	int	j,
		int	p
	)

Inserting parton p at place j.

normal_order()

void ColorFull::Quark_line::normal_order

(

)

If the quark_line is open, there is nothing to do, else order with smallest gluon index first (use that the trace is cyclic).

prepend() [1/2]

void ColorFull::Quark_line::prepend

(

int

p

)

Prepends parton p to the Quark_line.

prepend() [2/2]

void ColorFull::Quark_line::prepend

(

std::vector< int >

in_ql

)

Prepends a whole quark_line to the Quark_line.

read_in_Quark_line()

void ColorFull::Quark_line::read_in_Quark_line

(

std::string

filename

)

Function for reading in the Quark_line from the file filename, uses Quark_line_of_str.

size()

uint ColorFull::Quark_line::size ( ) const

inline

The size of the quark_line.

smallest()

int ColorFull::Quark_line::smallest	(	const Quark_line &	Ql1,
		const Quark_line &	Ql2
	)		const

Function for finding the "smallest" Quark_line of Ql1 and Ql2, used for deciding which Quark_line should stand first while normal ordering. Does NOT first normal order the Quark_lines. If only one is open, that Quark_line should stand first. If both are open or both are closed, the longest Quark_line should stand first. If the size is the same, the Quark_line with smallest starting number should stand first. If the first number is the same, check the 2nd number, then the 3rd... 1 is returned if Ql1 should stand first, and 2 if Ql2 should stand first. If Ql1==Ql2, 0 is returned.

split_Quark_line()

std::pair<Quark_line, Quark_line> ColorFull::Quark_line::split_Quark_line	(	int	j1,
		int	j2
	)		const

Function for splitting a closed Quark_line into two Quark_lines. The gluons at j1 and j2 are removed in the split. May create 1-rings and 0-rings.

write_out_Quark_line()

void ColorFull::Quark_line::write_out_Quark_line

(

std::string

filename

)

const

Function for writing out the Quark_line to a file with name filename.

Member Data Documentation

open

bool ColorFull::Quark_line::open

Is the string open, with a q in the beginning and a qbar in the end, or not?

Poly

Polynomial ColorFull::Quark_line::Poly

Polynomial factor, multiplying the quark_line.

ql

quark_line ColorFull::Quark_line::ql

To actually contain the color information, in order {q, g1, ... gn, qbar} or (g1, ..., gn).

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

• /data/Documents/eclipse/workspace/ColorFull/Quark_line.h