Kinematic singularities of Feynman integrals and principal A-determinants
نویسندگان
چکیده
We consider the analytic properties of Feynman integrals from perspective general A-discriminants and A-hypergeometric functions introduced by Gelfand,Kapranov Zelevinsky (GKZ). This enables us, to give a clear mathematically rigour description singular locus, also known as Landau variety, via principal A-determinants. comprise various second type singularities. Moreover, Horn-Kapranov-parametrization we very efficient way calculate parametrization varieties. furthermore present new approach study sheet structure multivalued use coamoebas.
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ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2022
ISSN: ['1127-2236', '1126-6708', '1029-8479']
DOI: https://doi.org/10.1007/jhep02(2022)004