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• W3198943510 abstract "Abstract We consider the analytic properties of Feynman integrals from the perspective of general A -discriminants and $$ mathcal{A} $$ <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML> <mml:mi>A</mml:mi> </mml:math> -hypergeometric functions introduced by Gelfand, Kapranov and Zelevinsky (GKZ). This enables us, to give a clear and mathematically rigorous description of the singular locus, also known as Landau variety, via principal A -determinants. We also comprise a description of the various second type singularities. Moreover, by the Horn-Kapranov-parametrization we give a very efficient way to calculate a parametrization of Landau varieties. We furthermore present a new approach to study the sheet structure of multivalued Feynman integrals by the use of coamoebas." @default.
• W3198943510 created "2021-09-27" @default.
• W3198943510 creator A5016736552 @default.
• W3198943510 date "2022-02-01" @default.
• W3198943510 modified "2023-10-01" @default.
• W3198943510 title "Kinematic singularities of Feynman integrals and principal A-determinants" @default.
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• W3198943510 doi "https://doi.org/10.1007/jhep02(2022)004" @default.
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