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Bounded Collection of Feynman Integral Calabi-Yau Geometries
被引:82
|作者:
Bourjaily, Jacob L.
[1
,2
]
McLeod, Andrew J.
[1
,2
]
von Hippel, Matt
[1
,2
]
Wilhelm, Matthias
[1
,2
]
机构:
[1] Univ Copenhagen, Niels Bohr Int Acad, Blegdamsvej 17, DK-2100 Copenhagen O, Denmark
[2] Univ Copenhagen, Niels Bohr Inst, Discovery Ctr, Blegdamsvej 17, DK-2100 Copenhagen O, Denmark
基金:
欧洲研究理事会;
关键词:
HODGE STRUCTURE;
DIAGRAMS;
SERIES;
HYPERSURFACES;
SPACE;
GRAPH;
D O I:
10.1103/PhysRevLett.122.031601
中图分类号:
O4 [物理学];
学科分类号:
0702 ;
摘要:
We define the rigidity of a Feynman integral to be the smallest dimension over which it is nonpolylogarithmic. We prove that massless Feynman integrals in four dimensions have a rigidity bounded by 2(L - 1) at L loops provided they are in the class that we call marginal: those with (L + 1)D/2 propagators in (even) D dimensions. We show that marginal Feynman integrals in D dimensions generically involve Calabi-Yau geometries, and we give examples of finite four-dimensional Feynman integrals in massless phi(4) theory that saturate our predicted bound in rigidity at all loop orders.
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