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arxiv: 1710.09883 · v1 · pith:N6XURFIUnew · submitted 2017-10-25 · 🧮 math-ph · hep-ph· math.AG· math.MP

Feynman integrals as flat bundles over the complement of Landau varieties

classification 🧮 math-ph hep-phmath.AGmath.MP
keywords betalandauvarietiescomplementintegralsconnectionequationfeynman
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We demonstrate that Feynman integrals of a fixed diagram form a flat vector bundle over the complement of Landau varieties that possesses a connection \begin{equation} \frac{\partial}{\partial p_{i,\mu}}f_\beta(p_{i,\mu})=\sum_{\beta'} \sum_k \sum_{I_1,...,I_k} \frac{A^{I_1,...,I_k}_{i,\mu,\beta,\beta'}(p)}{L_{I_1}(p)...L_{I_k}(p)} f_{\beta'}(p) \end{equation} where $L_I(p)$ are the Landau polynomials (multidiscriminants). This is the Gauss-Manin connection for the original integral. This result suggests a shift of focus from the integrals to the geometry of the complement of Landau varieties and Riemann-Hilbert data associated with these varieties.

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