def test_P_consistency():
"""
The parity quantum number is stored in the (curated) data CSV files.
For unflavoured mesons it can be calculated as P = (-1)^(L+1),
and this relation can be checked against the CSV data.
Note: mesons with PDGIDs of the kind 9XXXXXX (N=9) are not experimentally
well-known particles and P is undefined.
"""
for p in Particle.all():
if not p.is_unflavoured_meson:
continue
elif _digit(p.pdgid, Location.N) == 9:
continue
elif p.pdgid == 22: # Special case of the photon
assert p.P == -1
else:
assert p.P == (-1)**(p.L + 1)
def test_C_consistency():
"""
The charge conjugation parity is stored in the (curated) data CSV files.
For unflavoured mesons it can be calculated as C = (-1)^(L+S),
and this relation can be checked against the CSV data.
Note: mesons with PDGIDs of the kind 9XXXXXX (N=9) are not experimentally
well-known particles and C is undefined.
"""
for p in Particle.all():
if not p.is_unflavoured_meson:
continue
elif _digit(p.pdgid, Location.N) == 9:
continue
elif p.pdgid == 22: # Special case of the photon
assert p.C == -1
elif p.pdgid in [130, 310]: # Special case of the KS and KL
assert p.C == Parity.u
else:
assert p.C == (-1)**(p.L + p.S)