LoopHelasAmplitude object, behaving exactly as an amplitude except
that it also contains loop wave-functions closed on themselves, building
an amplitude corresponding to the closed loop.
new empty dictionary
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is_equivalent(self,
other)
Comparison between different LoopHelasAmplitude in order to recognize
which ones are equivalent at the level of the file output. |
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D[k] if k in D, else d
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filter(self,
name,
value)
Filter for valid LoopHelasAmplitude property values. |
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get_final_loop_wavefunction(self)
Return the non-external loop mother of the helas amplitude building
this loop amplitude |
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get_base_diagram(self,
wf_dict,
vx_list=[ ] ,
optimization=1)
Return the loop_base_objects.LoopDiagram which corresponds to this
amplitude, using a recursive method for the wavefunctions. |
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set_mothers_and_pairing(self)
Sets the mothers of this amplitude in the same order as they will be
used in the arguments of the helas calls building this loop |
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get_masses(self)
Returns the list of the masses of the loop particles as they should
appear for cuttools (L-cut particles specified last) |
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get_couplings(self)
Returns the list of the couplings of the different helas objects
building this HelasLoopAmplitude. |
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get_call_key(self)
The helas call to a loop is simple and only depends on the number of
loop lines and mothers. |
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get_orders(self)
Compute the orders building this loop amplitude only (not from the
struct wavefunctions. |
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get_analytic_info(self,
info,
alohaModel=None)
Returns an analytic information of the loop numerator, for example
the 'wavefunction_rank' i.e. |
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compute_analytic_information(self,
alohaModel)
Make sure that all analytic pieces of information about this
wavefunction are computed so that they can be recycled later,
typically without the need of specifying an alohaModel. |
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Inherited from core.helas_objects.HelasAmplitude :
__eq__ ,
__ne__ ,
__str__ ,
check_and_fix_fermion_flow ,
find_outgoing_number ,
get_aloha_info ,
get_base_vertex ,
get_color_indices ,
get_conjugate_index ,
get_epsilon_order ,
get_s_and_t_channels ,
has_multifermion ,
needs_hermitian_conjugate ,
nice_string ,
set ,
set_coupling_color_factor
Inherited from core.base_objects.PhysicsObject :
__getitem__ ,
__repr__ ,
is_valid_prop
Inherited from dict :
__cmp__ ,
__contains__ ,
__delitem__ ,
__ge__ ,
__getattribute__ ,
__gt__ ,
__iter__ ,
__le__ ,
__len__ ,
__lt__ ,
__new__ ,
__setitem__ ,
__sizeof__ ,
clear ,
copy ,
fromkeys ,
has_key ,
items ,
iteritems ,
iterkeys ,
itervalues ,
keys ,
pop ,
popitem ,
setdefault ,
update ,
values ,
viewitems ,
viewkeys ,
viewvalues
Inherited from object :
__delattr__ ,
__format__ ,
__reduce__ ,
__reduce_ex__ ,
__setattr__ ,
__subclasshook__
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