The warp drives I have defined for my science fiction setting work by creating a field which gives the ship a net negative mass to allow for faster-than-light travel.
What I want to know is how an object with negative mass, traveling at faster-than-light speeds, would interact with a ship traveling at sub-light speeds or a relatively stationary object; such as a planet or station.
I tried plugging the numbers into a calculator for collisions and got negative energy numbers, but I don't know what a negative energy collision would look like or if it's even possible.
I know what I want to see happen from a writing/worldbuilding standpoint, but I want to hear what would realistically happen to see if it's more interesting.
Clarification: The purpose of this question was to find out whether or not there were existing theories, that I could not find, that already described what would most likely happen in such a scenario. I wanted to make sure the solution I had considered writing in did not contradict any existing theories, models or other information on the subject of negative mass.