Constant | Symbol | Value [cgs] |
fine structure constant |
| 7.2973525693 × 10−3 |
Planck’s constant | h | 6.62607015 × 10−27 |
speed of light | c | 2.99792458 × 1010 |
electron mass | m | 9.1093837015 × 10−28 = 0.51099895000 MeV |
pion mass |
| 139.57077 MeV/c2 |
muon mass |
| 1.883531627 × 10−25 g |