def test_interaction_save(self):
"""Test the interaction save routine"""
mypart = base_objects.Particle({
'name': 't',
'antiname': 't~',
'spin': 2,
'color': 3,
'mass': 'mt',
'width': 'wt',
'texname': 't',
'antitexname': '\\overline{t}',
'line': 'straight',
'charge': 2. / 3.,
'pdg_code': 6,
'propagating': True,
'is_part': True
})
myinterlist = base_objects.InteractionList([\
base_objects.Interaction({'id': 1,
'particles': base_objects.ParticleList([mypart] * 4),
'color': [],
'lorentz':['L1', 'L2'],
'couplings':{(0, 0):'g00',
(0, 1):'g01',
(1, 0):'g10',
(1, 1):'g11'},
'orders':{'QCD':1, 'QED':1}})])
fsock = StringIO.StringIO()
save_model.save_interactions(fsock, myinterlist)
goal_str = "interactions = [\n%s]" % str(myinterlist[0])
self.assertEqual(fsock.getvalue(), goal_str)
def setUp(self):
""" Setup a toy-model with gluon and down-quark only """
# A gluon
self.mypartlist.append(
base_objects.Particle({
'name': 'g',
'antiname': 'g',
'spin': 3,
'color': 8,
'mass': 'zero',
'width': 'zero',
'texname': 'g',
'antitexname': 'g',
'line': 'curly',
'charge': 0.,
'pdg_code': 21,
'propagating': True,
'is_part': True,
'self_antipart': True
}))
# A quark D and its antiparticle
self.mypartlist.append(
base_objects.Particle({
'name': 'd',
'antiname': 'd~',
'spin': 2,
'color': 3,
'mass': 'dmass',
'width': 'zero',
'texname': 'd',
'antitexname': '\bar d',
'line': 'straight',
'charge': -1. / 3.,
'pdg_code': 1,
'propagating': True,
'is_part': True,
'self_antipart': False
}))
antid = copy.copy(self.mypartlist[1])
antid.set('is_part', False)
# 3 gluon vertex
self.myinterlist.append(base_objects.Interaction({
'id': 1,
'particles': base_objects.ParticleList(\
[self.mypartlist[0]] * 3),
'color': [],
'lorentz':['L1'],
'couplings':{(0, 0):'G'},
'orders':{'QCD':1}}))
# 4 gluon vertex
self.myinterlist.append(base_objects.Interaction({
'id': 2,
'particles': base_objects.ParticleList(\
[self.mypartlist[0]] * 4),
'color': [],
'lorentz':['L1'],
'couplings':{(0, 0):'G^2'},
'orders':{'QCD':2}}))
# Gluon coupling to the down-quark
self.myinterlist.append(base_objects.Interaction({
'id': 3,
'particles': base_objects.ParticleList(\
[self.mypartlist[1], \
antid, \
self.mypartlist[0]]),
'color': [],
'lorentz':['L1'],
'couplings':{(0, 0):'GQQ'},
'orders':{'QCD':1}}))
self.mymodel.set('particles', self.mypartlist)
self.mymodel.set('interactions', self.myinterlist)
self.myproc.set('model', self.mymodel)
self.myloopmodel = save_load_object.load_from_file(os.path.join(_input_file_path,\
'test_toyLoopModel.pkl'))
box_diagram, box_struct = self.def_box()
pent_diagram, pent_struct = self.def_pent()
self.box_drawing = draw_lib.LoopFeynmanDiagram(box_diagram, box_struct,
self.myloopmodel)
def setUp(self):
# Set up model
mypartlist = base_objects.ParticleList()
myinterlist = base_objects.InteractionList()
# A photon
mypartlist.append(
base_objects.Particle({
'name': 'a',
'antiname': 'a',
'spin': 3,
'color': 1,
'mass': 'zero',
'width': 'zero',
'texname': '\gamma',
'antitexname': '\gamma',
'line': 'wavy',
'charge': 0.,
'pdg_code': 22,
'propagating': True,
'is_part': True,
'self_antipart': True
}))
a = mypartlist[len(mypartlist) - 1]
# W+ and W-
mypartlist.append(
base_objects.Particle({
'name': 'w+',
'antiname': 'w-',
'spin': 3,
'color': 1,
'mass': 'wmas',
'width': 'wwid',
'texname': 'W^+',
'antitexname': 'W^-',
'line': 'wavy',
'charge': 1.,
'pdg_code': 24,
'propagating': True,
'is_part': True,
'self_antipart': False
}))
wplus = mypartlist[len(mypartlist) - 1]
wminus = copy.copy(wplus)
wminus.set('is_part', False)
# Z
mypartlist.append(
base_objects.Particle({
'name': 'z',
'antiname': 'z',
'spin': 3,
'color': 1,
'mass': 'zmas',
'width': 'zwid',
'texname': 'Z',
'antitexname': 'Z',
'line': 'wavy',
'charge': 1.,
'pdg_code': 23,
'propagating': True,
'is_part': True,
'self_antipart': True
}))
z = mypartlist[len(mypartlist) - 1]
# a-a-w+w- 4-vertex
myinterlist.append(base_objects.Interaction({
'id': 1,
'particles': base_objects.ParticleList(\
[a, \
a,
wminus,
wplus]),
'color': [],
'lorentz':['VVVV1'],
'couplings':{(0, 0):'GC_51'},
'orders':{'QED':2}}))
# w+w-z vertex
myinterlist.append(base_objects.Interaction({
'id': 2,
'particles': base_objects.ParticleList(\
[wminus,
wplus,
z]),
'color': [],
'lorentz':['VVV1'],
'couplings':{(0, 0):'GC_12'},
'orders':{'QED':1}}))
self.mybasemodel.set('particles', mypartlist)
self.mybasemodel.set('interactions', myinterlist)
self.mybasemodel.set('name', 'sm')
#import madgraph.interface.cmd_interface as cmd
#CMD = cmd.MadGraphCmdShell()
#CMD._curr_model = self.mybasemodel
#CMD._curr_fortran_model = helas_call_writers.FortranUFOHelasCallWriter
#CMD.do_generate('a w- > w- a z')
#CMD.do_export('matrix_v4 /tmp/')
leg1 = base_objects.Leg({'id': 22, 'state': False})
leg2 = base_objects.Leg({'id': 24, 'state': False})
leg3 = base_objects.Leg({'id': 22, 'state': True})
leg4 = base_objects.Leg({'id': 24, 'state': True})
leg5 = base_objects.Leg({'id': 23, 'state': True})
legList1 = base_objects.LegList([leg1, leg2, leg3, leg4, leg5])
myproc = base_objects.Process({
'legs': legList1,
'model': self.mybasemodel
})
myamplitude = diagram_generation.Amplitude({'process': myproc})
self.mymatrixelement = helas_objects.HelasMatrixElement(myamplitude)
def setUp(self):
# Set up model
mypartlist = base_objects.ParticleList()
myinterlist = base_objects.InteractionList()
# A gluon
mypartlist.append(
base_objects.Particle({
'name': 'g',
'antiname': 'g',
'spin': 3,
'color': 8,
'mass': 'zero',
'width': 'zero',
'texname': 'g',
'antitexname': 'g',
'line': 'curly',
'charge': 0.,
'pdg_code': 21,
'propagating': True,
'is_part': True,
'self_antipart': True
}))
g = mypartlist[len(mypartlist) - 1]
# A quark U and its antiparticle
mypartlist.append(
base_objects.Particle({
'name': 'u',
'antiname': 'u~',
'spin': 2,
'color': 3,
'mass': 'mu',
'width': 'zero',
'texname': 'u',
'antitexname': '\bar u',
'line': 'straight',
'charge': 2. / 3.,
'pdg_code': 2,
'propagating': True,
'is_part': True,
'self_antipart': False
}))
u = mypartlist[len(mypartlist) - 1]
antiu = copy.copy(u)
antiu.set('is_part', False)
# A quark D and its antiparticle
mypartlist.append(
base_objects.Particle({
'name': 'd',
'antiname': 'd~',
'spin': 2,
'color': 3,
'mass': 'mu',
'width': 'zero',
'texname': 'd',
'antitexname': '\bar d',
'line': 'straight',
'charge': -1. / 3.,
'pdg_code': 1,
'propagating': True,
'is_part': True,
'self_antipart': False
}))
d = mypartlist[len(mypartlist) - 1]
antid = copy.copy(d)
antid.set('is_part', False)
# A electron and positron
mypartlist.append(
base_objects.Particle({
'name': 'e+',
'antiname': 'e-',
'spin': 2,
'color': 1,
'mass': 'me',
'width': 'zero',
'texname': 'e^+',
'antitexname': 'e^-',
'line': 'straight',
'charge': -1.,
'pdg_code': 11,
'propagating': True,
'is_part': True,
'self_antipart': False
}))
eminus = mypartlist[len(mypartlist) - 1]
eplus = copy.copy(eminus)
eplus.set('is_part', False)
# A photon
mypartlist.append(
base_objects.Particle({
'name': 'a',
'antiname': 'a',
'spin': 3,
'color': 1,
'mass': 'zero',
'width': 'zero',
'texname': '\gamma',
'antitexname': '\gamma',
'line': 'wavy',
'charge': 0.,
'pdg_code': 22,
'propagating': True,
'is_part': True,
'self_antipart': True
}))
a = mypartlist[len(mypartlist) - 1]
# A T particle
mypartlist.append(
base_objects.Particle({
'name': 'T1',
'antiname': 'T1',
'spin': 5,
'color': 1,
'mass': 'zero',
'width': 'zero',
'texname': 'T',
'antitexname': 'T',
'line': 'double',
'charge': 0.,
'pdg_code': 8000002,
'propagating': False,
'is_part': True,
'self_antipart': True
}))
T1 = mypartlist[len(mypartlist) - 1]
# A U squark and its antiparticle
mypartlist.append(
base_objects.Particle({
'name': 'su',
'antiname': 'su~',
'spin': 1,
'color': 3,
'mass': 'Musq2',
'width': 'Wusq2',
'texname': '\tilde u',
'antitexname': '\bar {\tilde u}',
'line': 'dashed',
'charge': 2. / 3.,
'pdg_code': 1000002,
'propagating': True,
'is_part': True,
'self_antipart': False
}))
su = mypartlist[len(mypartlist) - 1]
antisu = copy.copy(su)
antisu.set('is_part', False)
# A E slepton and its antiparticle
mypartlist.append(
base_objects.Particle({
'name': 'sl2-',
'antiname': 'sl2+',
'spin': 1,
'color': 1,
'mass': 'Msl2',
'width': 'Wsl2',
'texname': '\tilde e^-',
'antitexname': '\tilde e^+',
'line': 'dashed',
'charge': 1.,
'pdg_code': 1000011,
'propagating': True,
'is_part': True,
'self_antipart': False
}))
seminus = mypartlist[len(mypartlist) - 1]
seplus = copy.copy(seminus)
seplus.set('is_part', False)
# A neutralino
mypartlist.append(
base_objects.Particle({
'name': 'n1',
'antiname': 'n1',
'spin': 2,
'color': 1,
'mass': 'Mneu1',
'width': 'Wneu1',
'texname': '\chi_0^1',
'antitexname': '\chi_0^1',
'line': 'straight',
'charge': 0.,
'pdg_code': 1000022,
'propagating': True,
'is_part': True,
'self_antipart': True
}))
n1 = mypartlist[len(mypartlist) - 1]
# W+ and W-
mypartlist.append(
base_objects.Particle({
'name': 'W+',
'antiname': 'W-',
'spin': 3,
'color': 1,
'mass': 'wmas',
'width': 'wwid',
'texname': 'W^+',
'antitexname': 'W^-',
'line': 'wavy',
'charge': 1.,
'pdg_code': 24,
'propagating': True,
'is_part': True,
'self_antipart': False
}))
wplus = mypartlist[len(mypartlist) - 1]
wminus = copy.copy(u)
wminus.set('is_part', False)
# Z
mypartlist.append(
base_objects.Particle({
'name': 'Z',
'antiname': 'Z',
'spin': 3,
'color': 1,
'mass': 'zmas',
'width': 'zwid',
'texname': 'Z',
'antitexname': 'Z',
'line': 'wavy',
'charge': 1.,
'pdg_code': 23,
'propagating': True,
'is_part': True,
'self_antipart': True
}))
z = mypartlist[len(mypartlist) - 1]
# Gluon and photon couplings to quarks
myinterlist.append(base_objects.Interaction({
'id': 3,
'particles': base_objects.ParticleList(\
[u, \
antiu, \
g]),
'color': [],
'lorentz':[''],
'couplings':{(0, 0):'GG'},
'orders':{'QCD':1}}))
myinterlist.append(base_objects.Interaction({
'id': 4,
'particles': base_objects.ParticleList(\
[d, \
antid, \
a]),
'color': [],
'lorentz':[''],
'couplings':{(0, 0):'MGVX15'},
'orders':{'QED':1}}))
myinterlist.append(base_objects.Interaction({
'id': 10,
'particles': base_objects.ParticleList(\
[d, \
antid, \
g]),
'color': [],
'lorentz':[''],
'couplings':{(0, 0):'GG'},
'orders':{'QCD':1}}))
myinterlist.append(base_objects.Interaction({
'id': 11,
'particles': base_objects.ParticleList(\
[u, \
antiu, \
a]),
'color': [],
'lorentz':[''],
'couplings':{(0, 0):'MGVX15'},
'orders':{'QED':1}}))
# Tgg coupling
myinterlist.append(base_objects.Interaction({
'id': 5,
'particles': base_objects.ParticleList(\
[g, \
g, \
T1]),
'color': [],
'lorentz':['A'],
'couplings':{(0, 0):'MGVX2'},
'orders':{'QCD':1}}))
# ggg coupling
myinterlist.append(base_objects.Interaction({
'id': 15,
'particles': base_objects.ParticleList(\
[g, \
g, \
g]),
'color': [],
'lorentz':[''],
'couplings':{(0, 0):'MGVX1'},
'orders':{'QCD':1}}))
# Coupling of e to gamma
myinterlist.append(base_objects.Interaction({
'id': 7,
'particles': base_objects.ParticleList(\
[eminus, \
eplus, \
a]),
'color': [],
'lorentz':[''],
'couplings':{(0, 0):'MGVX12'},
'orders':{'QED':1}}))
# Gluon coupling to su
myinterlist.append(base_objects.Interaction({
'id': 105,
'particles': base_objects.ParticleList(\
[g, \
su, \
antisu]),
'color': [],
'lorentz':[''],
'couplings':{(0, 0):'MGVX74'},
'orders':{'QCD':1}}))
# Coupling of n1 to u and su
myinterlist.append(base_objects.Interaction({
'id': 101,
'particles': base_objects.ParticleList(\
[n1, \
u, \
antisu]),
'color': [],
'lorentz':[''],
'couplings':{(0, 0):'MGVX570'},
'orders':{'QED':1}}))
myinterlist.append(base_objects.Interaction({
'id': 102,
'particles': base_objects.ParticleList(\
[antiu, \
n1, \
su]),
'color': [],
'lorentz':[''],
'couplings':{(0, 0):'MGVX575'},
'orders':{'QED':1}}))
# Coupling of n1 to e and se
myinterlist.append(base_objects.Interaction({
'id': 103,
'particles': base_objects.ParticleList(\
[n1, \
eminus, \
seplus]),
'color': [],
'lorentz':[''],
'couplings':{(0, 0):'MGVX350'},
'orders':{'QED':1}}))
myinterlist.append(base_objects.Interaction({
'id': 104,
'particles': base_objects.ParticleList(\
[eplus, \
n1, \
seminus]),
'color': [],
'lorentz':[''],
'couplings':{(0, 0):'MGVX494'},
'orders':{'QED':1}}))
# Coupling of n1 to z
myinterlist.append(base_objects.Interaction({
'id': 106,
'particles': base_objects.ParticleList(\
[n1, \
n1,
z]),
'color': [],
'lorentz':[''],
'couplings':{(0, 0):'GZN11'},
'orders':{'QED':1}}))
# g-gamma-su-subar coupling
myinterlist.append(base_objects.Interaction({
'id': 100,
'particles': base_objects.ParticleList(\
[a,
g,
su,
antisu]),
'color': [],
'lorentz':[''],
'couplings':{(0, 0):'MGVX89'},
'orders':{'QED':1, 'QCD':1}}))
# w+w-w+w- coupling
myinterlist.append(base_objects.Interaction({
'id': 8,
'particles': base_objects.ParticleList(\
[wplus,
wminus,
wplus,
wminus]),
'color': [],
'lorentz':[''],
'couplings':{(0, 0):'MGVX6'},
'orders':{'QED':2}}))
# w+w-zz coupling
myinterlist.append(base_objects.Interaction({
'id': 9,
'particles': base_objects.ParticleList(\
[wplus,
wminus,
z,
z]),
'color': [],
'lorentz':[''],
'couplings':{(0, 0):'MGVX8'},
'orders':{'QED':2}}))
self.mybasemodel.set('particles', mypartlist)
self.mybasemodel.set('interactions', myinterlist)
self.mybasemodel.set('name', 'sm')
self.mymodel.set('model', self.mybasemodel)
def test_export_matrix_element_python_madevent_group(self):
"""Test the result of exporting a subprocess group matrix element"""
# Setup a model
mypartlist = base_objects.ParticleList()
myinterlist = base_objects.InteractionList()
# A gluon
mypartlist.append(
base_objects.Particle({
'name': 'g',
'antiname': 'g',
'spin': 3,
'color': 8,
'mass': 'zero',
'width': 'zero',
'texname': 'g',
'antitexname': 'g',
'line': 'curly',
'charge': 0.,
'pdg_code': 21,
'propagating': True,
'is_part': True,
'self_antipart': True
}))
g = mypartlist[-1]
# A quark U and its antiparticle
mypartlist.append(
base_objects.Particle({
'name': 'u',
'antiname': 'u~',
'spin': 2,
'color': 3,
'mass': 'zero',
'width': 'zero',
'texname': 'u',
'antitexname': '\bar u',
'line': 'straight',
'charge': 2. / 3.,
'pdg_code': 2,
'propagating': True,
'is_part': True,
'self_antipart': False
}))
u = mypartlist[-1]
antiu = copy.copy(u)
antiu.set('is_part', False)
# A quark D and its antiparticle
mypartlist.append(
base_objects.Particle({
'name': 'd',
'antiname': 'd~',
'spin': 2,
'color': 3,
'mass': 'zero',
'width': 'zero',
'texname': 'd',
'antitexname': '\bar d',
'line': 'straight',
'charge': -1. / 3.,
'pdg_code': 1,
'propagating': True,
'is_part': True,
'self_antipart': False
}))
d = mypartlist[-1]
antid = copy.copy(d)
antid.set('is_part', False)
# A photon
mypartlist.append(
base_objects.Particle({
'name': 'a',
'antiname': 'a',
'spin': 3,
'color': 1,
'mass': 'zero',
'width': 'zero',
'texname': '\gamma',
'antitexname': '\gamma',
'line': 'wavy',
'charge': 0.,
'pdg_code': 22,
'propagating': True,
'is_part': True,
'self_antipart': True
}))
a = mypartlist[-1]
# A Z
mypartlist.append(
base_objects.Particle({
'name': 'z',
'antiname': 'z',
'spin': 3,
'color': 1,
'mass': 'MZ',
'width': 'WZ',
'texname': 'Z',
'antitexname': 'Z',
'line': 'wavy',
'charge': 0.,
'pdg_code': 23,
'propagating': True,
'is_part': True,
'self_antipart': True
}))
z = mypartlist[-1]
# Gluon and photon couplings to quarks
myinterlist.append(base_objects.Interaction({
'id': 1,
'particles': base_objects.ParticleList(\
[antiu, \
u, \
g]),
'color': [],
'lorentz':['L1'],
'couplings':{(0, 0):'GQQ'},
'orders':{'QCD':1}}))
myinterlist.append(base_objects.Interaction({
'id': 2,
'particles': base_objects.ParticleList(\
[antiu, \
u, \
a]),
'color': [],
'lorentz':['L1'],
'couplings':{(0, 0):'GQED'},
'orders':{'QED':1}}))
myinterlist.append(base_objects.Interaction({
'id': 3,
'particles': base_objects.ParticleList(\
[antid, \
d, \
g]),
'color': [],
'lorentz':['L1'],
'couplings':{(0, 0):'GQQ'},
'orders':{'QCD':1}}))
myinterlist.append(base_objects.Interaction({
'id': 4,
'particles': base_objects.ParticleList(\
[antid, \
d, \
a]),
'color': [],
'lorentz':['L1'],
'couplings':{(0, 0):'GQED'},
'orders':{'QED':1}}))
# 3 gluon vertiex
myinterlist.append(base_objects.Interaction({
'id': 5,
'particles': base_objects.ParticleList(\
[g] * 3),
'color': [],
'lorentz':['L1'],
'couplings':{(0, 0):'G'},
'orders':{'QCD':1}}))
# Coupling of Z to quarks
myinterlist.append(base_objects.Interaction({
'id': 6,
'particles': base_objects.ParticleList(\
[antiu, \
u, \
z]),
'color': [],
'lorentz':['L1', 'L2'],
'couplings':{(0, 0):'GUZ1', (0, 1):'GUZ2'},
'orders':{'QED':1}}))
myinterlist.append(base_objects.Interaction({
'id': 7,
'particles': base_objects.ParticleList(\
[antid, \
d, \
z]),
'color': [],
'lorentz':['L1', 'L2'],
'couplings':{(0, 0):'GDZ1', (0, 0):'GDZ2'},
'orders':{'QED':1}}))
mymodel = base_objects.Model()
mymodel.set('particles', mypartlist)
mymodel.set('interactions', myinterlist)
procs = [[2, -2, 21, 21], [2, -2, 2, -2]]
amplitudes = diagram_generation.AmplitudeList()
for proc in procs:
# Define the multiprocess
my_leglist = base_objects.LegList([\
base_objects.Leg({'id': id, 'state': True}) for id in proc])
my_leglist[0].set('state', False)
my_leglist[1].set('state', False)
my_process = base_objects.Process({
'legs': my_leglist,
'model': mymodel
})
my_amplitude = diagram_generation.Amplitude(my_process)
amplitudes.append(my_amplitude)
# Calculate diagrams for all processes
subprocess_group = group_subprocs.SubProcessGroup.\
group_amplitudes(amplitudes, "madevent")[0]
# Test amp2 lines
helas_writer = helas_call_writers.PythonUFOHelasCallWriter(mymodel)
python_exporter = export_python.ProcessExporterPython(
subprocess_group, helas_writer)
amp2_lines = \
python_exporter.get_amp2_lines(subprocess_group.\
get('matrix_elements')[0],
subprocess_group.get('diagram_maps')[0])
self.assertEqual(amp2_lines, [
'self.amp2[0]+=abs(amp[0]*amp[0].conjugate())',
'self.amp2[1]+=abs(amp[1]*amp[1].conjugate())',
'self.amp2[2]+=abs(amp[2]*amp[2].conjugate())'
])
def setUp(self):
# Set up model
mypartlist = base_objects.ParticleList()
myinterlist = base_objects.InteractionList()
# u and c quarkd and their antiparticles
mypartlist.append(
base_objects.Particle({
'name': 'u',
'antiname': 'u~',
'spin': 2,
'color': 3,
'mass': 'ZERO',
'width': 'ZERO',
'texname': 'u',
'antitexname': '\bar u',
'line': 'straight',
'charge': 2. / 3.,
'pdg_code': 2,
'propagating': True,
'is_part': True,
'self_antipart': False
}))
u = mypartlist[len(mypartlist) - 1]
antiu = copy.copy(u)
antiu.set('is_part', False)
mypartlist.append(
base_objects.Particle({
'name': 'c',
'antiname': 'c~',
'spin': 2,
'color': 3,
'mass': 'MC',
'width': 'ZERO',
'texname': 'c',
'antitexname': '\bar c',
'line': 'straight',
'charge': 2. / 3.,
'pdg_code': 4,
'propagating': True,
'is_part': True,
'self_antipart': False
}))
c = mypartlist[len(mypartlist) - 1]
antic = copy.copy(c)
antic.set('is_part', False)
# A gluon
mypartlist.append(
base_objects.Particle({
'name': 'g',
'antiname': 'g',
'spin': 3,
'color': 8,
'mass': 'ZERO',
'width': 'ZERO',
'texname': 'g',
'antitexname': 'g',
'line': 'curly',
'charge': 0.,
'pdg_code': 21,
'propagating': True,
'is_part': True,
'self_antipart': True
}))
g = mypartlist[len(mypartlist) - 1]
# A photon
mypartlist.append(
base_objects.Particle({
'name': 'Z',
'antiname': 'Z',
'spin': 3,
'color': 1,
'mass': 'MZ',
'width': 'WZ',
'texname': 'Z',
'antitexname': 'Z',
'line': 'wavy',
'charge': 0.,
'pdg_code': 23,
'propagating': True,
'is_part': True,
'self_antipart': True
}))
z = mypartlist[len(mypartlist) - 1]
# Gluon couplings to quarks
myinterlist.append(base_objects.Interaction({
'id': 1,
'particles': base_objects.ParticleList(\
[antiu, \
u, \
g]),
'color': [color.ColorString([color.T(2, 1, 0)])],
'lorentz':['FFV1'],
'couplings':{(0, 0):'GC_10'},
'orders':{'QCD':1}}))
# Gamma couplings to quarks
myinterlist.append(base_objects.Interaction({
'id': 2,
'particles': base_objects.ParticleList(\
[antiu, \
u, \
z]),
'color': [color.ColorString([color.T(1, 0)])],
'lorentz':['FFV2', 'FFV5'],
'couplings':{(0,0): 'GC_35', (0,1): 'GC_47'},
'orders':{'QED':1}}))
self.mymodel.set('particles', mypartlist)
self.mymodel.set('interactions', myinterlist)
self.mymodel.set('name', 'sm')
self.mypythonmodel = helas_call_writers.PythonUFOHelasCallWriter(
self.mymodel)
myleglist = base_objects.LegList()
myleglist.append(base_objects.Leg({'id': 2, 'state': False}))
myleglist.append(base_objects.Leg({'id': -2, 'state': False}))
myleglist.append(base_objects.Leg({'id': 2, 'state': True}))
myleglist.append(base_objects.Leg({'id': -2, 'state': True}))
myproc = base_objects.Process({
'legs': myleglist,
'model': self.mymodel
})
myamplitude = diagram_generation.Amplitude({'process': myproc})
self.mymatrixelement = helas_objects.HelasMultiProcess(myamplitude)
myleglist = base_objects.LegList()
myleglist.append(
base_objects.Leg({
'id': 4,
'state': False,
'number': 1
}))
myleglist.append(
base_objects.Leg({
'id': -4,
'state': False,
'number': 2
}))
myleglist.append(
base_objects.Leg({
'id': 4,
'state': True,
'number': 3
}))
myleglist.append(
base_objects.Leg({
'id': -4,
'state': True,
'number': 4
}))
myproc = base_objects.Process({
'legs': myleglist,
'model': self.mymodel
})
self.mymatrixelement.get('matrix_elements')[0].\
get('processes').append(myproc)
self.exporter = export_python.ProcessExporterPython(\
self.mymatrixelement, self.mypythonmodel)
def setUp(self):
# A gluon
self.mypartlist.append(
base_objects.Particle({
'name': 'g',
'antiname': 'g',
'spin': 3,
'color': 8,
'mass': 'zero',
'width': 'zero',
'texname': 'g',
'antitexname': 'g',
'line': 'curly',
'charge': 0.,
'pdg_code': 21,
'propagating': True,
'is_part': True,
'self_antipart': True
}))
# A quark U and its antiparticle
self.mypartlist.append(
base_objects.Particle({
'name': 'u',
'antiname': 'u~',
'spin': 2,
'color': 3,
'mass': 'zero',
'width': 'zero',
'texname': 'u',
'antitexname': '\bar u',
'line': 'straight',
'charge': 2. / 3.,
'pdg_code': 2,
'propagating': True,
'is_part': True,
'self_antipart': False
}))
antiu = copy.copy(self.mypartlist[1])
antiu.set('is_part', False)
# A quark D and its antiparticle
self.mypartlist.append(
base_objects.Particle({
'name': 'd',
'antiname': 'd~',
'spin': 2,
'color': 3,
'mass': 'zero',
'width': 'zero',
'texname': 'u',
'antitexname': '\bar u',
'line': 'straight',
'charge': -1. / 3.,
'pdg_code': 1,
'propagating': True,
'is_part': True,
'self_antipart': False
}))
antid = copy.copy(self.mypartlist[2])
antid.set('is_part', False)
# 3 gluon vertiex
self.myinterlist.append(base_objects.Interaction({
'id': 1,
'particles': base_objects.ParticleList(\
[self.mypartlist[0]] * 3),
'color': [color.ColorString([color.f(0, 1, 2)])],
'lorentz':['L1'],
'couplings':{(0, 0):'G'},
'orders':{'QCD':1}}))
# 4 gluon vertex
self.myinterlist.append(base_objects.Interaction({
'id': 2,
'particles': base_objects.ParticleList(\
[self.mypartlist[0]] * 4),
'color': [color.ColorString([color.f(-1, 0, 2),
color.f(-1, 1, 3)]),
color.ColorString([color.f(-1, 0, 3),
color.f(-1, 1, 2)]),
color.ColorString([color.f(-1, 0, 1),
color.f(-1, 2, 3)])],
'lorentz':['L(p1,p2,p3)', 'L(p2,p3,p1)', 'L3'],
'couplings':{(0, 0):'G^2',
(1, 1):'G^2',
(2, 2):'G^2'},
'orders':{'QCD':2}}))
# Gluon couplings to up and down quarks
self.myinterlist.append(base_objects.Interaction({
'id': 3,
'particles': base_objects.ParticleList(\
[self.mypartlist[1], \
antiu, \
self.mypartlist[0]]),
'color': [color.ColorString([color.T(2, 0, 1)])],
'lorentz':['L1'],
'couplings':{(0, 0):'GQQ'},
'orders':{'QCD':1}}))
self.myinterlist.append(base_objects.Interaction({
'id': 4,
'particles': base_objects.ParticleList(\
[self.mypartlist[2], \
antid, \
self.mypartlist[0]]),
'color': [color.ColorString([color.T(2, 0, 1)])],
'lorentz':['L1'],
'couplings':{(0, 0):'GQQ'},
'orders':{'QCD':1}}))
self.mymodel.set('particles', self.mypartlist)
self.mymodel.set('interactions', self.myinterlist)
def test_colorize_funny_model(self):
"""Test the colorize function for uu~ > ggg"""
mypartlist = base_objects.ParticleList()
myinterlist = base_objects.InteractionList()
mymodel = base_objects.Model()
# A gluon
mypartlist.append(
base_objects.Particle({
'name': 'g',
'antiname': 'g',
'spin': 3,
'color': 8,
'mass': 'zero',
'width': 'zero',
'texname': 'g',
'antitexname': 'g',
'line': 'curly',
'charge': 0.,
'pdg_code': 21,
'propagating': True,
'is_part': True,
'self_antipart': True
}))
# 3 gluon vertiex
myinterlist.append(base_objects.Interaction({
'id': 1,
'particles': base_objects.ParticleList(\
[mypartlist[0]] * 3),
'color': [color.ColorString([color.f(0, 1, 2)]),
color.ColorString([color.f(0, 2, 1)]),
color.ColorString([color.f(1, 2, 0)])],
'lorentz':['L1'],
'couplings':{(0, 0):'G', (2,0):'G'},
'orders':{'QCD':1}}))
mymodel.set('particles', mypartlist)
mymodel.set('interactions', myinterlist)
myleglist = base_objects.LegList()
myleglist.append(base_objects.Leg({'id': 21, 'state': False}))
myleglist.append(base_objects.Leg({'id': 21, 'state': False}))
myleglist.extend([base_objects.Leg({'id': 21, 'state': True})] * 2)
myprocess = base_objects.Process({'legs': myleglist, 'model': mymodel})
myamplitude = diagram_generation.Amplitude()
myamplitude.set('process', myprocess)
myamplitude.generate_diagrams()
my_col_basis = color_amp.ColorBasis()
# Check that only the color structures that are actually used are included
col_dict = my_col_basis.colorize(myamplitude['diagrams'][0], mymodel)
goal_dict = {
(2, 0):
color.ColorString([color.f(1, 2, -1000),
color.f(3, 4, -1000)]),
(0, 0):
color.ColorString([color.f(-1000, 1, 2),
color.f(3, 4, -1000)]),
(0, 2):
color.ColorString([color.f(-1000, 1, 2),
color.f(4, -1000, 3)]),
(2, 2):
color.ColorString([color.f(1, 2, -1000),
color.f(4, -1000, 3)])
}
self.assertEqual(col_dict, goal_dict)
'is_part': True,
'self_antipart': True
})
particles = base_objects.ParticleList([gluon, up, down, photon, higgs])
# Interactions
#=========================================================================================
interactions = base_objects.InteractionList()
# g g g
interactions.append(base_objects.Interaction({
'id': 1,
'particles': base_objects.ParticleList([gluon, ] * 3),
'color': [color.ColorString([color.f(0, 1, 2)])],
'lorentz': ['L1'],
'couplings': {(0, 0): 'G'},
'orders': {'QCD': 1}
}))
# g g g g
interactions.append(base_objects.Interaction({
'id': 2,
'particles': base_objects.ParticleList([gluon, ] * 4),
'color': [
color.ColorString([color.f(-1, 0, 2), color.f(-1, 1, 3)]),
color.ColorString([color.f(-1, 0, 3), color.f(-1, 1, 2)]),
color.ColorString([color.f(-1, 0, 1), color.f(-1, 2, 3)])
],
'lorentz': ['L(p1,p2,p3)', 'L(p2,p3,p1)', 'L3'],
'couplings': {(0, 0): 'G^2', (1, 1): 'G^2', (2, 2): 'G^2'},
def test_read_interactions(self):
"""Test the output of import interactions.dat file"""
particles_dat_str = """ve ve~ F S ZERO ZERO S ve 12
vm vm~ F S ZERO ZERO S vm 14
vt vt~ F S ZERO ZERO S vt 16
e- e+ F S ZERO ZERO S e 11
m- m+ F S ZERO ZERO S m 13
tt- tt+ F S MTA ZERO S tt 15
u u~ F S ZERO ZERO T u 2
c c~ F S MC ZERO T c 4
t t~ F S MT WT T t 6
d d~ F S ZERO ZERO T d 1
s s~ F S ZERO ZERO T s 3
b b~ F S MB ZERO T b 5
a a V W ZERO ZERO S a 22
z z V W MZ WZ S Z 23
w+ w- V W MW WW S W 24
g g V C ZERO ZERO O G 21
h h S D MH WH S H 25
T1 T1 T D ZERO ZERO O T1 8000002"""
interactions_dat_str = """# Interactions associated with Standard_Model
w+ w- a MGVX3 QED
g g T1 MGVX2 QCD a
w+ w- w+ w- MGVX6 DUM0 QED QED n
e- ve w- MGVX24 QED
e+ ve~ w+ MGVX25 QED
u u g MGVX1 QCD
u u a MGVX4 QED
# And now some bad format entries
# which should be ignored with a warning
k+ k- a test QED
g g test QCD"""
fsock_part = StringIO.StringIO(particles_dat_str)
fsock_inter = StringIO.StringIO(interactions_dat_str)
myparts = import_v4.read_particles_v4(fsock_part)
wplus = copy.copy(myparts[14])
wmin = copy.copy(myparts[14])
wmin.set('is_part', False)
eminus = copy.copy(myparts[3])
eplus = copy.copy(myparts[3])
eplus.set('is_part', False)
enu = copy.copy(myparts[0])
enubar = copy.copy(myparts[0])
enubar.set('is_part', False)
photon = copy.copy(myparts[12])
gluon = copy.copy(myparts[15])
t1 = copy.copy(myparts[17])
u = myparts[6]
ubar = copy.copy(myparts[6])
ubar.set('is_part', False)
my_i_f = color.ColorString([color.f(0, 1, 2)])
my_i_f.is_imaginary = True
goal_inter_list = base_objects.InteractionList([ \
base_objects.Interaction(
{'id':1,
'particles':base_objects.ParticleList([
wplus,
wmin,
photon]),
'color':[],
'lorentz':[''],
'couplings':{(0, 0):'MGVX3'},
'orders':{'QED':1}}),
base_objects.Interaction(
{'id':2,
'particles':base_objects.ParticleList([
gluon,
gluon,
t1]),
'color':[my_i_f],
'lorentz':['A'],
'couplings':{(0, 0):'MGVX2'},
'orders':{'QCD':1}}),
base_objects.Interaction(
{'id':3,
'particles':base_objects.ParticleList([
wplus,
wmin,
wplus,
wmin]),
'color':[],
'lorentz':['WWVVN'],
'couplings':{(0, 0):'MGVX6'},
'orders':{'QED':2}}),
base_objects.Interaction(
{'id':4,
'particles':base_objects.ParticleList([
eplus,
enu,
wmin]),
'color':[],
'lorentz':[''],
'couplings':{(0, 0):'MGVX24'},
'orders':{'QED':1}}),
base_objects.Interaction(
{'id':5,
'particles':base_objects.ParticleList([
eminus,
enubar,
wplus]),
'color':[],
'lorentz':[''],
'couplings':{(0, 0):'MGVX25'},
'orders':{'QED':1}}),
base_objects.Interaction(
{'id':6,
'particles':base_objects.ParticleList([
ubar,
u,
gluon]),
'color':[color.ColorString(\
[color.T(2, 1, 0)])],
'lorentz':[''],
'couplings':{(0, 0):'MGVX1'},
'orders':{'QCD':1}}),
base_objects.Interaction(
{'id':7,
'particles':base_objects.ParticleList([
ubar,
u,
photon]),
'color':[color.ColorString(\
[color.T(1, 0)])],
'lorentz':[''],
'couplings':{(0, 0):'MGVX4'},
'orders':{'QED':1}})])
result = import_v4.read_interactions_v4(fsock_inter, myparts)
self.assertEqual(len(result), len(goal_inter_list))
for i in range(len(result)):
self.assertEqual(result[i], goal_inter_list[i])
def test_ungrouping_lepton(self):
"""check that the routines which ungroup the process for the muon/electron processes
works as expected"""
# Setup A simple model
mypartlist = base_objects.ParticleList()
myinterlist = base_objects.InteractionList()
# A quark U and its antiparticle
mypartlist.append(
base_objects.Particle({
'name': 'u',
'antiname': 'u~',
'spin': 2,
'color': 3,
'mass': 'zero',
'width': 'zero',
'texname': 'u',
'antitexname': '\bar u',
'line': 'straight',
'charge': 2. / 3.,
'pdg_code': 2,
'propagating': True,
'is_part': True,
'self_antipart': False
}))
u = mypartlist[-1]
antiu = copy.copy(u)
antiu.set('is_part', False)
# A quark D and its antiparticle
mypartlist.append(
base_objects.Particle({
'name': 'd',
'antiname': 'd~',
'spin': 2,
'color': 3,
'mass': 'zero',
'width': 'zero',
'texname': 'd',
'antitexname': '\bar d',
'line': 'straight',
'charge': -1. / 3.,
'pdg_code': 1,
'propagating': True,
'is_part': True,
'self_antipart': False
}))
d = mypartlist[-1]
antid = copy.copy(d)
antid.set('is_part', False)
# A quark C and its antiparticle
mypartlist.append(
base_objects.Particle({
'name': 'c',
'antiname': 'c~',
'spin': 2,
'color': 3,
'mass': 'zero',
'width': 'zero',
'texname': 'u',
'antitexname': '\bar u',
'line': 'straight',
'charge': 2. / 3.,
'pdg_code': 4,
'propagating': True,
'is_part': True,
'self_antipart': False
}))
c = mypartlist[-1]
antic = copy.copy(c)
antic.set('is_part', False)
# electron/positront
mypartlist.append(
base_objects.Particle({
'name': 'e-',
'antiname': 'e+',
'spin': 2,
'color': 1,
'mass': 'zero',
'width': 'zero',
'texname': 'u',
'antitexname': '\bar u',
'line': 'straight',
'charge': 1,
'pdg_code': 11,
'propagating': True,
'is_part': True,
'self_antipart': False
}))
e = mypartlist[-1]
antie = copy.copy(e)
mu = copy.copy(e)
antie.set('is_part', False)
mu.set('name', 'mu-')
mu.set('antiname', 'mu+')
mu.set('pdg_code', 13)
mypartlist.append(mu)
antimu = copy.copy(mu)
antimu.set('is_part', False)
# A Z
mypartlist.append(
base_objects.Particle({
'name': 'z',
'antiname': 'z',
'spin': 3,
'color': 1,
'mass': 'MZ',
'width': 'WZ',
'texname': 'Z',
'antitexname': 'Z',
'line': 'wavy',
'charge': 0.,
'pdg_code': 23,
'propagating': True,
'is_part': True,
'self_antipart': True
}))
z = mypartlist[-1]
# Coupling of Z to quarks
myinterlist.append(base_objects.Interaction({
'id': 1,
'particles': base_objects.ParticleList(\
[antiu, \
u, \
z]),
'color': [color.ColorString([color.T(1,0)])],
'lorentz':['FFV1', 'FFV2'],
'couplings':{(0, 0):'GUZ1', (0, 1):'GUZ2'},
'orders':{'QED':1}}))
myinterlist.append(base_objects.Interaction({
'id': 2,
'particles': base_objects.ParticleList(\
[antid, \
d, \
z]),
'color': [color.ColorString([color.T(1,0)])],
'lorentz':['FFV1', 'FFV2'],
'couplings':{(0, 0):'GDZ1', (0, 1):'GDZ2'},
'orders':{'QED':1}}))
myinterlist.append(base_objects.Interaction({
'id': 3,
'particles': base_objects.ParticleList(\
[antic, \
c, \
z]),
'color': [color.ColorString([color.T(1,0)])],
'lorentz':['FFV1', 'FFV2'],
'couplings':{(0, 0):'GUZ1', (0, 1):'GUZ2'},
'orders':{'QED':1}}))
# Coupling of Z to leptons
myinterlist.append(base_objects.Interaction({
'id': 4,
'particles': base_objects.ParticleList(\
[antie, \
e, \
z]),
'color': [color.ColorString()],
'lorentz':['FFV1', 'FFV2'],
'couplings':{(0, 0):'GLZ1', (0, 1):'GLZ2'},
'orders':{'QED':1}}))
# Coupling of Z to leptons
myinterlist.append(base_objects.Interaction({
'id': 5,
'particles': base_objects.ParticleList(\
[antimu, \
mu, \
z]),
'color': [color.ColorString()],
'lorentz':['FFV1', 'FFV2'],
'couplings':{(0, 0):'GLZ1', (0, 1):'GLZ2'},
'orders':{'QED':1}}))
mymodel = base_objects.Model()
mymodel.set('particles', mypartlist)
mymodel.set('interactions', myinterlist)
mymodel.set('name', 'sm')
procs = [[1, -1, 23], [2, -2, 23], [4, -4, 23]]
decays = [[23, 11, -11], [23, 13, -13]]
coreamplitudes = diagram_generation.AmplitudeList()
decayamplitudes = diagram_generation.AmplitudeList()
decayprocs = base_objects.ProcessList()
#Building the basic objects
for proc in procs:
# Define the multiprocess
my_leglist = base_objects.LegList([\
base_objects.Leg({'id': id, 'state': True}) for id in proc])
my_leglist[0].set('state', False)
my_leglist[1].set('state', False)
my_process = base_objects.Process({
'legs': my_leglist,
'model': mymodel
})
my_amplitude = diagram_generation.Amplitude(my_process)
my_amplitude.set('has_mirror_process', True)
coreamplitudes.append(my_amplitude)
for proc in decays:
# Define the multiprocess
my_leglist = base_objects.LegList([\
base_objects.Leg({'id': id, 'state': True}) for id in proc])
my_leglist[0].set('state', False)
my_process = base_objects.Process({
'legs': my_leglist,
'model': mymodel,
'is_decay_chain': True
})
my_amplitude = diagram_generation.Amplitude(my_process)
decayamplitudes.append(my_amplitude)
decayprocs.append(my_process)
decays = diagram_generation.DecayChainAmplitudeList([\
diagram_generation.DecayChainAmplitude({\
'amplitudes': decayamplitudes})])
decay_chains = diagram_generation.DecayChainAmplitude({\
'amplitudes': coreamplitudes,
'decay_chains': decays})
dc_subproc_group = group_subprocs.DecayChainSubProcessGroup.\
group_amplitudes(\
diagram_generation.DecayChainAmplitudeList([decay_chains]))
subproc_groups = \
dc_subproc_group.generate_helas_decay_chain_subproc_groups()
######################
## Make the test!! ##
######################
self.assertEqual(len(subproc_groups), 1)
subproc_groups = subproc_groups.split_lepton_grouping()
self.assertEqual(len(subproc_groups), 2)
# check that indeed
for group in subproc_groups:
self.assertEqual(len(group['matrix_elements']), 2)
has_muon = any(
abs(l['id']) == 13 for l in group['matrix_elements'][0]
['processes'][0]['decay_chains'][0]['legs'])
for me in group['matrix_elements']:
if abs(me['processes'][0]['legs'][0]['id']) == 1:
self.assertEqual(len(me['processes']), 1)
else:
self.assertEqual(len(me['processes']), 2)
for proc in me['processes']:
for dec in proc['decay_chains']:
if has_muon:
self.assertFalse(
any(abs(l['id']) == 11 for l in dec['legs']))
else:
self.assertFalse(
any(abs(l['id']) == 13 for l in dec['legs']))
self.assertNotEqual(group['name'], 'qq_z_z_ll')
if has_muon:
self.assertEqual(group['name'], 'qq_z_z_mummup')
else:
self.assertEqual(group['name'], 'qq_z_z_emep')
group['name']
