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  1. Home
  2. Indian Institute of Technology Madras
  3. Publication4
  4. Unveiling regions in multi-scale Feynman integrals using singularities and power geometry
 
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Unveiling regions in multi-scale Feynman integrals using singularities and power geometry

Date Issued
01-01-2019
Author(s)
Ananthanarayan, B.
Pal, Abhishek
Ramanan, S. 
Indian Institute of Technology, Madras
Sarkar, Ratan
DOI
10.1140/epjc/s10052-019-6533-x
Abstract
We introduce a novel approach for solving the problem of identifying regions in the framework of Method of Regions by considering singularities and the associated Landau equations given a multi-scale Feynman diagram. These equations are then analyzed by an expansion in a small threshold parameter via the Power Geometry technique. This effectively leads to the analysis of Newton Polytopes which are evaluated using a Mathematica based convex hull program. Furthermore, the elements of the Gröbner Basis of the Landau Equations give a family of transformations, which when applied, reveal regions like potential and Glauber. Several one-loop and two-loop examples are studied and benchmarked using our algorithm which we call ASPIRE.
Volume
79
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