Implements a regulator given by. More...

#include <regulators.hh>

Static Public Member Functions
template<int c0, int... c>
static __forceinline__ __device__ __host__ auto	get_f (std::integer_sequence< int, c0, c... >, const auto x)

template<int c0, int... c>
static __forceinline__ __device__ __host__ auto	get_df (std::integer_sequence< int, c0, c... >, const auto x)

template<typename NT1 , typename NT2 >
static __forceinline__ __device__ __host__ auto	RB (const NT1 k2, const NT2 q2)

template<typename NT1 , typename NT2 >
static __forceinline__ __device__ __host__ auto	RBdot (const NT1 k2, const NT2 q2)

template<typename NT1 , typename NT2 >
static __forceinline__ __device__ __host__ auto	dq2RB (const NT1 k2, const NT2 q2)

template<typename NT1 , typename NT2 >
static __forceinline__ __device__ __host__ auto	RF (const NT1 k2, const NT2 q2)

template<typename NT1 , typename NT2 >
static __forceinline__ __device__ __host__ auto	RFdot (const NT1 k2, const NT2 q2)

template<typename NT1 , typename NT2 >
static __forceinline__ __device__ __host__ auto	dq2RF (const NT1 k2, const NT2 q2)

Static Public Attributes
static constexpr int	order = OPTS::order

Detailed Description

template<class OPTS = PolynomialExpRegulatorOpts>
struct DiFfRG::PolynomialExpRegulator< OPTS >

Implements a regulator given by.

\[R_B(x) = k^2 e^{-f(x)}\,,\]

where \(f(x)\) is a polynomial chosen such that the propagator gets a pole of order order at x = 0 if the mass becomes negative (convexity restoration).

Provides the following functions:

RB(k2, q2) = \( k^2 e^{-f(x)} \)
RBdot(k2, q2) = \( \partial_t R_B(k^2,p^2) \)
dq2RB(k2, q2) = \( \frac{\partial}{\partial q^2} R_B(k^2,p^2) \)
RF(k2, q2) = \( \sqrt{R_B(k^2,p^2) + p^2} - p \)
RFdot(k2, q2) = \( p \partial_ t R_F(k^2,p^2) \)
dq2RF(k2, q2) = \( \frac{\partial}{\partial q^2} R_F(k^2,p^2) \)

Template Parameters

order order of the pole.