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arXiv 2302.14840math.AGhep-th
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双圈Feynman积分的运动几何

Motivic geometry of two-loop Feynman integrals

Charles F. Doran, Andrew Harder, Eric Pichon-Pharabod, Pierre Vanhove

摘要:

我们研究了一般物理参数下的双圈费曼积分的三次超曲面的几何和Hodge理论。我们表明,霍奇结构附加到平面双回路费曼图分解成混合泰特片和霍奇结构的家庭超椭圆,椭圆,或有理曲线取决于时空维度。对于边数较少的双环图,我们给出了更精确的结果。特别地,我们恢复了Bloch arXiv:2105.06132的结果,即在众所周知的双盒例子中,存在一个潜在的椭圆曲线族,并且我们给出了这些椭圆曲线的具体描述。我们认为,动机的非平面双回路缓步图是皮卡德数11的K3表面,并确定一般的晶格极化。最后,我们表明,通用的冰淇淋锥家庭的图超曲面的成员对应于对日落卡拉比-丘品种。

英文摘要:

We study the geometry and Hodge theory of the cubic hypersurfaces attached to two-loop Feynman integrals for generic physical parameters. We show that the Hodge structure attached to planar two-loop Feynman graphs decomposes into mixed Tate pieces and the Hodge structures of families of hyperelliptic, elliptic, or rational curves depending on the space-time dimension. For two-loop graphs with a small number of edges, we give more precise results. In particular, we recover a result of Bloch arXiv:2105.06132 that in the well-known double box example, there is an underlying family of elliptic curves, and we give a concrete description of these elliptic curves. We argue that the motive for the non-planar two-loop tardigrade graph is that of a K3 surface of Picard number 11 and determine the generic lattice polarization. Lastly, we show that generic members of the ice cream cone family of graph hypersurfaces correspond to pairs of sunset Calabi--Yau varieties.

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