40 constexpr
double mz = 91.18;
61 double abserr_, relerr_;
67 double abserr,
double relerr
69 double decouple_up(
double alpha_s,
threshold thr,
int nf)
const;
70 double decouple_down(
double alpha_s,
threshold thr,
int nf)
const;
73 static constexpr
int max_running_order = 4;
76 static constexpr
double default_error = 1e-6;
87 int order = max_running_order
96 double operator()(
double mu)
const;
167 alpha_s_nf5.decouple_down(bottom_threshold);
174 alpha_s_nf5.decouple_up(top_threshold);
constexpr double alpha_s_mz
Default value for the strong coupling at the Z scale.
Definition: alpha_s.hpp:38
Definition: alpha_s.hpp:35
double mu
Reference scale.
Definition: alpha_s.hpp:47
double alpha_s
Value of alpha_s at the reference scale mu.
Definition: alpha_s.hpp:45
Implements the running and decoupling of the strong coupling constant.
Definition: alpha_s.hpp:58
constexpr double mz
Default value for the Z boson mass.
Definition: alpha_s.hpp:40
int nf
Number of active flavours.
Definition: alpha_s.hpp:49
Threshold for the decoupling of a quark flavour.
Definition: threshold.hpp:42
Value for strong coupling constant at a reference scale.
Definition: alpha_s.hpp:43