This is the initial state radiation (ISR) at a possible lepton collider (either an electron-positron collider or a muon collider). The structure function includes all orders of soft and soft-collinear photons and the hard-collinear photons up to the third order. Several Standard Model (SM) processes are implemented in Mathematica as examples: (ll > tt, ll > ww, ll > zz, and ll > zh)
- fisr.m: A Mathematica package for QED ISR structure functions
- para.m: A Mathematica package to set up the SM parameters
- ME2: Amplitude square after phase space integration for the for examples
- demo.nb: Examples
If you use fisr in your research, please cite
T. Han, Y. Ma, and K. Xie, Phys.Rev.D 103 (2021) 3, L031301, arXiv:2007.14300.