Constants. More...

Variables
const double	yotta =1e24

const double	zetta =1e21

const double	exa =1e18

const double	peta =1e15

const double	tera =1e12

const double	giga =1e9

const double	mega =1e6

const double	kilo =1e3

const double	milli =1e-3

const double	micro =1e-6

const double	nano =1e-9

const double	pico =1e-12

const double	femto =1e-15

const double	atto =1e-18

const double	zepto =1e-21

const double	yocto =1e-24

const double	fine_structure =7.2973525698e-3
	Fine structure constant (CODATA 2010 value)

const double	avogadro =6.02214129e23
	Avogadro's number (CODATA 2010 value)

const double	pi =acos(-1.0)
	$\pi$

const double	pi2 =pi*pi
	$\pi^2$

const double	zeta32 =2.6123753486854883433
	$\zeta(3/2)$

const double	zeta2 =1.6449340668482264365
	$\zeta(2)$

const double	zeta52 =1.3414872572509171798
	$\zeta(5/2)$

const double	zeta3 =1.2020569031595942854
	$\zeta(3)$

const double	zeta5 =1.0369277551433699263
	$\zeta(5)$

const double	zeta7 =1.0083492773819228268
	$\zeta(7)$

const double	sin2_theta_weak =0.23126
	$\sin^2 \theta_W$ (PDG 2014 value)

const double	hc_mev_fm
	$\hbar c$ in MeV fm (derived) More...

const double	hc_mev_cm =hc_mev_fm*1.0e-13
	$\hbar c$ in MeV cm (derived)

const double	ec_gauss_fm2
	1 $\mathrm{Gauss}$ times the electron charge in Gaussian units in $\mathrm{fm}^{-2}$ More...

const double	gauss2_fm4
	Conversion factor from $\mathrm{Gauss}^2$ to $\mathrm{fm}^{-4}$ in Gaussian units. More...

const double	mass_lambda_MeV =1115.683
	$\Lambda$ hyperon mass in $\mathrm{MeV}$ More...

const double	mass_sigma_minus_MeV =1197.449
	$\Sigma$ hyperon mass in $\mathrm{MeV}$

const double	mass_sigma_zero_MeV =1192.642
	$\Sigma$ hyperon mass in $\mathrm{MeV}$

const double	mass_sigma_plus_MeV =1189.37
	$\Sigma$ hyperon mass in $\mathrm{MeV}$

Squared electron charge
const double	e2_gaussian
	Electron charge squared in Gaussian units (derived) More...

const double	e2_hlorentz =o2scl_const::fine_structure4.0pi
	Electron charge sqaured in Heaviside-Lorentz units where $\hbar=c=1$ (derived) More...

const double	e2_mksa =o2scl_mksa::electron_charge
	Electron charge squared in SI(MKSA) units (derived) More...

Detailed Description

CODATA 2010 values are in Mohr12.

Variable Documentation

◆ e2_gaussian

const double o2scl_const::e2_gaussian

Initial value:

=o2scl_const::hc_mev_fm*

o2scl_const::fine_structure

o2scl_const::hc_mev_fm

const double hc_mev_fm

in MeV fm (derived)

Definition: constants.h:978

o2scl_const::fine_structure

const double fine_structure

Fine structure constant (CODATA 2010 value)

Definition: constants.h:56

In Gaussian Units:

$\begin{eqnarray*} &\vec{\nabla} \cdot \vec{E} = 4 \pi \rho \, , \quad \vec{E}=-\vec{\nabla} \Phi \, , \quad \nabla^2 \Phi = - 4 \pi \rho \, , &\\& F=\frac{q_1 q_2}{r^2} \, , \quad W=\frac{1}{2} \int \rho V d^3 x =\frac{1}{8 \pi} \int | \vec{E} |^2 d^3 x \, , \quad \alpha=\frac{e^2}{\hbar c}=\frac{1}{137}& \end{eqnarray*}$

Definition at line 1005 of file constants.h.

◆ e2_hlorentz

const double o2scl_const::e2_hlorentz =o2scl_const::fine_structure*4.0*pi

In Heaviside-Lorentz units:

$\begin{eqnarray*} &\vec{\nabla} \cdot \vec{E} = \rho \, , \quad \vec{E}=-\vec{\nabla} \Phi \, , \quad \nabla^2 \Phi = - \rho \, , &\\& F=\frac{q_1 q_2}{4 \pi r^2} \, , \quad W=\frac{1}{2} \int \rho V d^3 x =\frac{1}{2} \int | \vec{E} |^2 d^3 x \, , \quad \alpha=\frac{e^2}{4 \pi}=\frac{1}{137}& \end{eqnarray*}$

Definition at line 1027 of file constants.h.

◆ e2_mksa

const double o2scl_const::e2_mksa =o2scl_mksa::electron_charge

In MKSA units:

$\begin{eqnarray*} &\vec{\nabla} \cdot \vec{E} = \rho \, , \quad \vec{E}=-\vec{\nabla} \Phi \, , \quad \nabla^2 \Phi = - \rho \, , &\\& F=\frac{1}{4 \pi \varepsilon_0}\frac{q_1 q_2}{r^2} \, , \quad W=\frac{1}{2} \int \rho V d^3 x =\frac{\varepsilon_0}{2} \int | \vec{E} |^2 d^3 x \, , \quad \alpha=\frac{e^2}{4 \pi \varepsilon_0 \hbar c}=\frac{1}{137}& \end{eqnarray*}$