39 namespace QQbar_threshold{
50 constexpr
double mZ = 91.1876;
52 constexpr
double mW = 80.385;
55 constexpr
double G_F = 0.000011663787;
64 constexpr
double e_u = 2./3.;
66 constexpr
double e_d = -1./3.;
68 constexpr
double e = -1;
77 constexpr
double T3_e = -1./2.;
79 constexpr
double T3_u = 1./2.;
81 constexpr
double T3_d = -1./2.;
108 return T3/(2*sqrt(
sw2*
cw2));
118 return (T3 - 2*e*
sw2)/(2*sqrt(sw2*
cw2));
124 last_coupling = vector
133 inline double c_e<axial>(){
139 inline double c_e<vector>(){
150 inline double c_nu<axial>(){
156 inline double c_nu<vector>(){
double vector_Z_coupling(double T3, double e)
Vector coupling of fermion to Z boson.
Definition: constants.hpp:117
constexpr int nl_top
Number of light flavours for top-related functions.
Definition: constants.hpp:91
constexpr double mu_alpha_Y
Typical scale for Y resonances.
Definition: constants.hpp:48
constexpr double T3_u
Weak isospin of top.
Definition: constants.hpp:79
constexpr double mZ
Mass of the Z boson.
Definition: constants.hpp:50
constexpr double e_u
Electric charge of the top quark in units of the positron charge.
Definition: constants.hpp:64
constexpr double alpha_QED
Fine structure constant.
Definition: constants.hpp:61
constexpr double alpha_mZ
QED coupling at the scale mZ.
Definition: constants.hpp:44
constexpr double sw2
sine of the weak mixing angle squared
Definition: constants.hpp:72
constexpr double T3_e
Weak isospin of electron.
Definition: constants.hpp:77
constexpr double m_Higgs
Default value for mass of the Higgs boson.
Definition: constants.hpp:58
constexpr double mb_SI
Reference scale-invariant mass for bottom quarks.
Definition: constants.hpp:84
constexpr double alpha_s_mZ
Default value for strong coupling at the scale mZ.
Definition: constants.hpp:42
constexpr double mu_thr
Decoupling threshold for bottom quarks.
Definition: constants.hpp:86
constexpr double T3_nu
Weak isospin of neutrino.
Definition: constants.hpp:75
constexpr double G_F
Fermi constant - this is exclusively used for calculating the top width.
Definition: constants.hpp:55
constexpr int nl_bottom
Number of light flavours for bottom-related functions.
Definition: constants.hpp:89
double axial_Z_coupling(double T3, double)
Axial vector coupling of fermion to Z boson.
Definition: constants.hpp:107
constexpr double e_d
Electric charge of the bottom quark in units of the positron charge.
Definition: constants.hpp:66
constexpr double T3_d
Weak isospin of bottom.
Definition: constants.hpp:81
constexpr double mu_f_bottom
Default PS scale for bottom.
Definition: constants.hpp:94
constexpr double cw2
cosine of the weak mixing angle squared
Definition: constants.hpp:70
constexpr double mW
Mass of the W boson.
Definition: constants.hpp:52
constexpr double e
Electric charge of the electron in units of the positron charge.
Definition: constants.hpp:68
constexpr double mu_f_top
Default PS scale for top.
Definition: constants.hpp:97
constexpr double alpha_Y
QED coupling at the scale mu_alpha_Y.
Definition: constants.hpp:46
constexpr double invGeV2_to_pb
Conversion factor from 1/GeV^2 to picobarn.
Definition: constants.hpp:100