Elementary particles

413

electron

	$_{Z}^{A} E^{q}$	$X_{q}^{A} X_{2 q}^{2 A} x$	mass ( $u$ )
electron	$β X^{-}$ , $e X^{-}$		(electron mass $m_{e}$ ) $5.48579909070 \times 1 0^{- 4}$
positron (or antielectron)	$β X^{+}$ , $e X^{+}$	$X_{+ 1}^{0} X_{2 + 1}^{20} e$ , $X_{+ 1}^{0} X_{2 + 1}^{20} β$	$1 m_{e}$

	$_{Z}^{A} E^{q}$	$X_{q}^{A} X_{2 q}^{2 A} x$	mass ( $u$ )
proton	$p$ , $p^{+}$ , $X_{1}^{1} X_{21}^{21} H X^{+}$		$1.007276466812$
neutron	$n$ , $n^{0}$	$X_{0}^{1} X_{20}^{21} n$	$1.00866491588$