You're a theoretical physicist who discover a potentially world ending reaction
The field you're working in is highly specialised branch of particle physics, with no one else in the world currently working on it.
The reaction is stable and produces kilograms of antimatter per second. Antimatter essentially explodes when it touches anything other than antimatter. The reaction looks sound on paper, you obviously can't test your theory without destroying the world.
There are a few ways I think you could go about this, you could:
Publish your findings. Put your name on it, and take all the fame and backlash from discovering this reaction, and leave the responsibility of not ending the world up to everyone else.
Cover up your findings. Try to cover up what you discovered with the most scientific version of "there's nothing here, just boring science stuff" result you can.
Get the authorities involved. Call up your authorities and try to get a select few in the most secretive branch of the government, and trust that they will keep the information safe.
Or you could do literally anything else
What would you do?