Implementation of asymptotically correct P->P and 0->PP form factors

dvandyk commented 4 years ago

[x] add interface for vacuum to 2 pseudoscalar form factors (@dvandyk)
[ ] add class implementing 0->PP form factors, specialized for the pi pi case (@ESEberhard)
- [x] add code for z(q2)
- [x] add code for the outer function of the e.m. form factor
- [x] add code for the first four orthogonal polynomials and the series (mind the weight function!)
- [x] make sure that our definition of f_+ agrees with the definition in eq. (1) of this paper.
- [ ] cross check against the cross section formula provided in eq. (2.14) of this paper
[x] add unit test with inputs/outcomes provided by @gubernari (@ESEberhard)
[ ] add constraints on |F_pi|^2 from BESIII data (@gubernari) The corresponding paper is 1507.08188
[ ] add class implementing e+ e- -> pi pi scattering (@ESEberhard, optional)

dvandyk commented 4 years ago

@ESEberhard please use the branch 'issue238' from my private repository as the base for your implementation.

ESEberhard commented 4 years ago

[x] add interface for vacuum to 2 pseudoscalar form factors (@dvandyk)

[ ] add class implementing 0->PP form factors, specialized for the pi pi case (@ESEberhard)

[x] add code for z(q2)

[x] add code for the outer function of the e.m. form factor

[x] add code for the first four orthogonal polynomials and the series (mind the weight function!)

[x] make sure that our definition of f_+ agrees with the definition in eq. (1) of this paper.

[ ] cross check against the cross section formula provided in eq. (2.14) of this paper

[ ] add unit test with inputs/outcomes provided by @gubernari (@ESEberhard)

[ ] add constraints on |F_pi|^2 from BESIII data (@gubernari) The corresponding paper is 1507.08188

[ ] add class implementing e+ e- -> pi pi scattering (@ESEberhard, optional)

eos / eos

Implementation of asymptotically correct P->P and 0->PP form factors #238