I have a quesiton on the TMath::Voigt documentation. I post part of the description given at the TMath documentation page:
Double_t Voigt(Double_t x, Double_t sigma, Double_t lg, Int_t R = 4)
Computation of Voigt function (normalised).
Voigt is a convolution of
gauss(xx) = 1/(sqrt(2*pi)*sigma) * exp(xx * xx/(2 * sigma * sigma)
and
lorentz(xx) = (1/pi) * (lg/2) / (xx * xx + g * g/4) functions.
What is not obvious to me is the variable g. Do any of you know what g is?