plotting – Ticks does not show origin in plot

I am unable to denote the origin of my plot.

plot1 = Plot[ccads, {[Sigma], 0, 0.5}, PlotRange -> {-1.5, 3}, 
Ticks -> {{0, 1, 2}, {0, -1, 1}}, 
Epilog -> {Black, PointSize@Large, Point[{0.07957747154594766`, 0}],
Point[{0.23873241463784303`, 0}]} ,  
AxesLabel -> {HoldForm[4 [Pi] Subscript[G, 4 ] [Sigma]], 
HoldForm[Subscript[[CapitalLambda], 3]]}, PlotLabel -> None, 
LabelStyle -> {12, GrayLevel[0]}]

enter image description here

It does not appear automatically and unfortunately nor with my attempt of brute force using

Ticks -> {{0, 1, 2}, {0, -1, 1}}

Actually, I don’t want anything but the “0” denoting the origin. How can I accomplish this?

Unfortunately, it is not an option to place a text “0” at the origin since it will interfere with the axes in a way that looks unprofessional. I am very surprised it is so little or bad information on how to accomplish this simple task. Any help is very appreciated.