Constants (skhep.constants)ΒΆ
This module skhep.constants contains 2 sorts of constants:
- Physical constants.
- Common and/or handy constants.
All constants are computed in the HEP System of Units as defined in the skhep.units package.
Typical use case:
>>> from skhep.constants import c_light
>>> from skhep.units import picosecond, micrometer
>>> tau_Bs = 1.5 * picosecond # a particle lifetime, say the Bs meson's
>>> ctau_Bs = c_light * tau_Bs # ctau of the particle, ~450 microns
>>> print ctau_Bs # result in HEP units, so mm ;-)
0.449688687
>>> print ctau_Bs / micrometer # result in micrometers
449.688687