The Master Differential Equations for the 2-loop Sunrise Selfmass Amplitudes

الأصل · EN

The master differential equations in the external square momentum p² for the master integrals of the two-loop sunrise graph, in n-continuous dimensions and for arbitrary values of the internal masses, are derived. The equations are then used for working out the values at p² = 0 and the expansions in p² at p² =0, in (n-4) at n to 4 limit and in 1/p² for large values of p².