feynlag.groups.gauge.SU2

class feynlag.groups.gauge.SU2(name, coupling=None)

SU(2); legacy labels 1 (singlet), 2 (fundamental), 3 (adjoint).

__init__(name, coupling=None)

Methods

__init__(name[, coupling])
bosons([name])	Create (once) and return this group's gauge boson field.
generators(rep)	List of generator matrices T^a for representation rep.
pauli_dot(vector_symbols)	Σ_a V^a σ^a — the WsigmaL pattern for covariant derivatives.
rep_dim(rep)	Dimension of the representation labelled rep.
structure_constant(a, b, c)
structure_constants()	f^{abc} as a dict {(a, b, c): value} of non-zero entries.

Attributes

abelian
g	The coupling as a plain SymPy symbol.
n_generators	Number of generators (= number of gauge bosons).