# H-shaped diagram with Tikz-Feynman

I am new on Tikz-Feynman and I am trying to write all possible diagrams that I have studied. Currently, I am working on this diagram that comes from an effective field theory: the output are two straight and parallel lines, that exchange two other straight and parallel lines. I would like to insert another propagator in the middle but perpendicular, in order to have a H-shaped diagram, how can I do this? This is my code

$$\centering \feynmandiagram[medium, layered layout, horizontal=a to b] { i1 [particle]-- a-- b-- f1, i2 [particle]-- c-- d-- f2 [particle], { [ same layer] a -- c }, { [ same layer] b -- d}, };$$

• A picture of what you'd like to create would be helpful. I've given it my best guess below. – Steven Gardiner Jan 2 '18 at 13:23

$$\centering \feynmandiagram[medium, horizontal=a to b] { i1 [particle]-- a -- b -- f1 [particle], i3 --[draw=none] c -- d --[draw=none] f3, i2 [particle]-- e -- f -- f2 [particle], a -- c -- e, b -- d -- f, };$$