Accelerator Physics/Constants

Constants

Name	symbol	Value
Speed of light	$c$	$2.99792458\times 10^8\mathrm{m}/\mathrm{s}$
Electron charge	$e$	$1.60217733\times 10^{-19}\mathrm{C}$
Electron mass	$m_e$	$0.511\mathrm{M}\mathrm{e}\mathrm{V}/{\mathrm{c}}^{\mathrm{2}}$
Muon mass	$m_{\mu }$	$105.6583745(24)\mathrm{M}\mathrm{e}\mathrm{V}/{\mathrm{c}}^{\mathrm{2}}$
Pion mass	$m_{\pi }$	$139.57018(35)\mathrm{M}\mathrm{e}\mathrm{V}/{\mathrm{c}}^{\mathrm{2}}$
Muon mean lifetime	${\tau }_{\mu }$	$2.1969811(22)\mathrm{\mu }\mathrm{s}$
Pion mean lifetime	${\tau }_{\pi }$	$26.033\pm 0.005\mathrm{n}\mathrm{s}$
Permeability of free space	${\mu }_0$	$4\pi \times 10^{-7}\mathrm{T}\mathrm{\cdot }\mathrm{m}/\mathrm{A}$
Permitivity of free space	${ϵ}_0$	$8.854187817\times 10^{-12}\mathrm{F}/\mathrm{m}$
Planck constant	$h$	$4.1356675\times 10^{-15}\mathrm{e}\mathrm{V}\mathrm{\cdot }\mathrm{s}$
Dirac constant (reduced Planck constant)	$\hslash$	$6.5821195\times 10^{-16}\mathrm{e}\mathrm{V}\mathrm{\cdot }\mathrm{s}$
Compton wavelength	${\lambda }_C$	$2.42631058\times 10^{-12}\mathrm{m}$