Parameters (hazma.parameters)

hazma’s collection of physical constants.

Masses

All masses are in MeV.

hazma.parameters.higgs_mass: float = 125100.0

Higgs mass in MeV

hazma.parameters.electron_mass: float = 0.5109989461

Electron mass in MeV

hazma.parameters.muon_mass: float = 105.6583745

Muon mass in MeV

hazma.parameters.tau_mass: float = 1776.86

Tau mass in MeV

hazma.parameters.neutral_pion_mass: float = 134.9768

Neutral pion mass in MeV

hazma.parameters.charged_pion_mass: float = 139.57039

Charged pion mass in MeV

hazma.parameters.eta_mass: float = 547.862

Eta mass in MeV

hazma.parameters.eta_prime_mass: float = 957.78

Eta’ mass in MeV

hazma.parameters.charged_kaon_mass: float = 493.677

Charged kaon mass in MeV

hazma.parameters.neutral_kaon_mass: float = 497.611

Neutral kaon mass in MeV

hazma.parameters.long_kaon_mass: float = 497.611

Long kaon mass in MeV

hazma.parameters.short_kaon_mass: float = 497.611

Short kaon mass in MeV

hazma.parameters.rho_mass: float = 775.26

Rho mass in MeV

hazma.parameters.omega_mass: float = 782.66

Omega mass in MeV

hazma.parameters.phi_mass: float = 1019.461

Phi mass in MeV

hazma.parameters.charged_B_mass: float = 5279.29

Charged B mass in MeV

hazma.parameters.pion_mass_chiral_limit: float = 137.273595

Pion mass in MeV (chiral-limit)

hazma.parameters.kaon_mass_chiral_limit: float = 495.644

Kaon mass in MeV (chiral-limit)

hazma.parameters.up_quark_mass: float = 2.16

Up-quark mass in MeV

hazma.parameters.down_quark_mass: float = 4.67

Down-quark mass in MeV

hazma.parameters.strange_quark_mass: float = 95.0

Strange-quark mass in MeV

hazma.parameters.charm_quark_mass: float = 1270.0

Charm-quark mass in MeV

hazma.parameters.bottom_quark_mass: float = 4180.0

Bottom-quark mass in MeV

hazma.parameters.top_quark_mass: float = 172900.0

Top-quark mass in MeV

Conversion factors

hazma.parameters.cm_to_inv_MeV = 50677307161.56396

Convert \(\mathrm{cm}\) to \(\mathrm{MeV}^{-1}\)

hazma.parameters.sv_inv_MeV_to_cm3_per_s = 1.1673299907789853e-11

Convert \(\expval{\sigma v}\) from \(\mathrm{MeV}^{-2}\) to \(\mathrm{cm}^{3}/\mathrm{s}\)

hazma.parameters.g_to_MeV = 5.609588603804452e+26

Convert \(\mathrm{grams}\) to \(\mathrm{MeV}\)

hazma.parameters.MeV_to_g = 1.7826619216278976e-27

Convert \(\mathrm{MeV}\) to \(\mathrm{grams}\)

hazma.parameters.Msun_to_g = 1.988e+33

Solar mass to grams

hazma.parameters.g_to_Msun = 5.030181086519115e-34

Gram to solar mass

Physical Constants

hazma.parameters.alpha_em: float = 0.0072971395213076475

Electromagnetic fine structure constant.

hazma.parameters.GF: float = 1.1663787e-11

Fermi constant in MeV**-2

hazma.parameters.vh: float = 246227.95

Higg vacuum expectation value in MeV

hazma.parameters.qe: float = 0.30281770035689687

\(e\) - Electromagnetic coupling constant

hazma.parameters.temp_cmb_formation: float = 2.35e-07

\(T_{\mathrm{CMB}}\) - CMB temperature at formation in MeV

hazma.parameters.plank_mass: float = 1.22091e+22

\(M_{\mathrm{pl}}\) - Plank mass in MeV

hazma.parameters.rho_crit: float = 0.0105375

\(\rho_{\mathrm{crit}}\) - Critical energy density in units of \(h^2 \ [\mathrm{MeV} / \mathrm{cm}^3]\)

hazma.parameters.sm_entropy_density_today: float = 2891.2

\(s_{0}\) - Entropy density today [\(\mathrm{cm}^{-3}\)]

hazma.parameters.omega_h2_cdm: float = 0.1198

\(\Omega_{\mathrm{CMD}}h^2\) - Energy density fraction of dark matter times \(h^2\)

hazma.parameters.dimensionless_hubble_constant: float = 0.6774

\(h = H_{0}/(100 \mathrm{km/s/Mpc})\) - Hubble constant scale by 100 km/s/Mpc (Plank 2015)

hazma.parameters.sin_theta_weak_sqrd: float = 0.2229

\(\sin^2\theta_{W}\) - Square of the sine of the Weinberg angle

hazma.parameters.sin_theta_weak: float = 0.47212286536451503

\(\sin\theta_{W}\) - Sine of the Weinberg angle

hazma.parameters.cos_theta_weak: float = 0.8815327560561774

\(\cos\theta_{W}\) - Cosine of the Weinberg angle

hazma.parameters.Vud: complex = (0.974352121697273+0j)

\(V_{ud}\) - up-down CKM matrix element

hazma.parameters.Vus: complex = (0.22499846626868697+0j)

\(V_{us}\) - up-strange CKM matrix element

hazma.parameters.Vts: complex = (-0.041088514331340434-0.000755182227369455j)

\(V_{ts}\) - top-strange CKM matrix element

hazma.parameters.Vtb: complex = (0.9991185074624703+0j)

\(V_{tb}\) - top-bottom CKM matrix element

hazma.parameters.Vtd: complex = (0.007916871032258304-0.0032703040945479727j)

\(V_{td}\) - top-down CKM matrix element

hazma.parameters.Qu: float = 0.6666666666666666

\(Q_{u}/e\) - Up-type quark charge in units of electron charge.

hazma.parameters.Qd: float = -0.3333333333333333

\(Q_{d}/e\) - Down-type quark charge in units of electron charge.

hazma.parameters.Qe: float = -1.0

\(Q_{e}/e\) - Charged lepton charge in units of electron charge.

hazma.parameters.fpi0: float = 91.924

\(f_{\pi^{0}}\) - Neutral pion decay constant.

hazma.parameters.fpi: float = 92.2138

\(f_{\pi^{\pm}}\) - Charged pion decay constant.

hazma.parameters.fk: float = 110.379

\(f_{K^{\pm}}\) - Charged kaon decay constant.

hazma.parameters.b0: float = 2759.0102319508087

\(B_{0} = \expval{\bar{q}q}/(3f_{\pi}^2)\) - ChiPT mass parameter