Minimum distance diagrams are a way to encode the diameter and routing information of multi-loop networks. For the widely studied case of double-loop networks, it is known that each network has at most two such diagrams and that they have a very definite form (" L-shape "). In contrast, in this paper we show that there are triple-loop networks with an arbitrarily big number of associated minimu...

The electric dipole moment of the muon (dμ) is evaluated in a two Higgs doublet model with a softly broken discrete symmetry. For tan β ≡ |v2|/|v1| ∼ 1, contributions from two loop diagrams involving the t quark and the W boson dominate; while for tan β ∼ > 10, contributions from two loop diagrams involving the b quark and the τ lepton are dominant. For 8 ∼ > tan β ∼ > 4, significant cancellati...

An algorithm for obtaining the Taylor coefficients of an expansion of Feynman diagrams is proposed. It is based on recurrence relations which can be applied to the propagator as well as to the vertex diagrams. As an application, several coefficients of the Taylor series expansion for the two-loop non-planar vertex and two-loop propagator diagrams are calculated. The results of the numerical eva...

Methods to capture the complexity of using policy instruments would allow us better evaluate reasons for their effectiveness. Drawing from science, we produce a Causal Loop Diagram analyse implementation two informational in tourism destination: Global Sustainable Tourism Council criteria and European Indicator Scheme. To interpret emerging system structure, use theory concepts emergence; inter...

We present intermediate results of an ongoing investigation which attempts a generalization of the well known one-loop Bern Kosower rules of Yang-Mills theory to higher loop orders. We set up a general procedure to extract the field theoretical limit of bosonic open string diagrams, based on the sewing construction of higher loop world sheets. It is tested with oneand two-loop scalar field theo...

The calculation of loop integrals is essential to obtain the precise theoretical prediction for high-energy reactions. Loop integrals for oneloop diagrams can be expressed by logarithms and dilogarithms. For a class of higher order diagrams, compact analytic expressions are obtained. For instance, some two-loop two point functions with single mass(m) are given by functions of x = s/m. As two-lo...