Speaker
文 陈
(浙大物理系)
Description
We developed a systematic method to reduce Feynman integrals in the parametric representation. This method proves to be more efficient than the integration-by-part (IBP) method in the momentum space. Tensor integrals can directly be parametrized without performing tensor reductions. The integrands of parametric integrals are functions of Lorentz scalars, instead of four momenta. The complexity of a calculation is determined by the number of propagators that are present rather than the number of all the linearly independent propagators. Furthermore, the symmetries of Feynman integrals under permutations of indices are transparent in the parametric representation. This method can also be used to reduce integrals with theta functions.
Primary author
文 陈
(浙大物理系)
