From $\mathrm{d}\log$ to $\mathrm{d}\mathcal{E}$: Canonical Elliptic Integrands and Modular Symbol Letters with Pure eMPLs

Li Lin Yang, Yiyang Zhang

We propose '$\mathrm{d}\mathcal{E}$-forms' as fundamental building blocks of canonical integrands for elliptic Feynman integrals, which lead to Kronecker-Eisenstein $\omega$-form symbo…