feynlag.export.ufo.writer.UFOParticle¶

class feynlag.export.ufo.writer.UFOParticle(symbol, pdg, name, antiname=None, spin=1, mass='ZERO', width='ZERO', color=1, charge=0, antisymbol=None, goldstone=False, texname=None, antitexname=None)[source]¶

Specification of one UFO particle.

Parameters:

symbol (object)
pdg (int)
name (str)
antiname (str)
spin (int)
mass (str)
width (str)
color (int)
charge (float)
antisymbol (object)
goldstone (bool)
texname (str)
antitexname (str)

symbol¶

physical SymPy symbol used in the vertex tables.

Type:: object

pdg¶

PDG code.

Type:: int

name / antiname: UFO names (equal → self-conjugate).

spin¶

UFO 2s+1 (1 scalar, 2 fermion, 3 vector).

Type:: int

mass / width: parameter names, or 'ZERO'.

color¶

1 (singlet), 3, 8.

Type:: int

charge¶

electric charge.

Type:: float

antisymbol¶

the symbol used for the conjugate in vertex tables (e.g. the Gm partner of Gp); None if self-conjugate.

Type:: object

goldstone¶

mark Goldstone bosons.

Type:: bool

texname / antitexname: LaTeX (defaults to names).

__init__(symbol, pdg, name, antiname=None, spin=1, mass='ZERO', width='ZERO', color=1, charge=0, antisymbol=None, goldstone=False, texname=None, antitexname=None)¶

Parameters:

symbol (object)
pdg (int)
name (str)
antiname (str)
spin (int)
mass (str)
width (str)
color (int)
charge (float)
antisymbol (object)
goldstone (bool)
texname (str)
antitexname (str)

Return type:

None

Methods

__init__(symbol, pdg, name[, antiname, ...])

Attributes

`antiname`
`antisymbol`
`antitexname`
`charge`
`color`
`goldstone`
`mass`
`self_conjugate`
`spin`
`texname`
`width`
`symbol`
`pdg`
`name`