Interactive examples¶
This page exposes some of the functionality of the expertsystem as online utilities.
Particle database¶
The load_pdg function creates a ParticleCollection instance containing
the latest PDG info. Its find and
filter methods allows you to quickly look up the quantum
numbers of a particle and, vice versa, look up particle candidates based on a
set of quantum numbers.
from expertsystem import io
pdg = io.load_pdg()
pdg.find(22) # by PID
pdg.find("Delta(1920)++") # by name
subset = pdg.filter(
lambda p:
p.spin in [2.5, 3.5, 4.5]
and p.name.startswith("N")
)
subset.names
The filter function can perform any type of search. For
available search properties, have a look at properties of Particle class.
For more info on the search syntax, read more about lambda functions in Python.