This function is equal to negative the mass of the particle over two pi all times the T-matrix, which canbe derived using the Lippmann-Schwinger equation. The wavefunction and this function can be expandedin terms of Legendre polynomials in partial wave expansion, which can be used to determine the phaseshifts. Using the Born approximation, this function is the Fourier transform of the potential with respect tothe wave vector. The optical theorem gives the extinction cross-section as equal to four pi overwavenumber times the imaginary part of this function and its square is equal to the differentialcross-section. For 10 points, identify this function that gives the probability of scattering 
This function is equal to negative the mass of the particle over two pi all times the T-matrix, which canbe derived using the Lippmann-Schwinger equation. The wavefunction and this function can be expandedin terms of Legendre polynomials in partial wave expansion, which can be used to determine the phaseshifts. Using the Born approximation, this function is the Fourier transform of the potential with respect tothe wave vector. The optical theorem gives the extinction cross-section as equal to four pi overwavenumber times the imaginary part of this function and its square is equal to the differentialcross-section. For 10 points, identify this function that gives the probability of scattering in a givendirection
This function is equal to negative the mass of the particle over two pi all times the T-matrix, which canbe derived using the Lippmann-Schwinger equation.
scattering amplitude [or forward scattering amplitude]