[jeffreyH (OP)]

Charged particles will interact in a way that can hide gravitational effects. Are there any benefits to studying the way neutral particles interact in a gravitational field? If not then why not?

[Bored chemist]

This is why Cavendish used neutral objects in his experiments on gravity.
Hardly a novel approach.

[Kryptid]

Are there any benefits to studying the way neutral particles interact in a gravitational field?

Yes: https://physicsworld.com/a/neutrons-reveal-quantum-effects-of-gravity/

[jeffreyH (OP)]

Some of the other uses of the techniques are discussed in this interview.
https://www.labnews.co.uk/interviews/big-ask/dr-valery-nesvizhevsky-on-his-serendipitous-discovery-12-05-2014/

[evan_au]

Quote from: jeffreyH on 08/03/2018 17:31:36

Are there any benefits to studying the way neutral particles interact in a gravitational field?

Yes: https://physicsworld.com/a/neutrons-reveal-quantum-effects-of-gravity/

I got the impression that this paper was talking about diffraction of neutrons from a periodic surface.
- It was not measuring the quantisation of space or quantisation of gravity.

There is an experiment underway at CERN trying to measure the gravitational attraction of antimatter.
Electric fields are much stronger than the gravitational field, so the only practical way to measure gravitational attraction is to use neutral particles, like anti-Hydrogen.

See: https://en.wikipedia.org/wiki/Gravitational_interaction_of_antimatter

[evan_au]

Are there any benefits to studying the way neutral particles interact in a gravitational field?

On a more macroscopic scale, larger neutral particles are used to do experiments on microgravity. The drop tower at ZARM can simulate microgravity (10^-5 to 10^-6g) for around 5 seconds by dropping an experimental module, or almost twice that by throwing it upwards, an waiting for it to come down again...
- They use it to study Bose-Einstein condensates
- Plus chemistry, physics, solar sails, etc
See: http://omegataupodcast.net/279-microgravity-research-at-zarm-drop-tower/

The Pound-Rebka experiment showed the reality of gravitational red shift (or equivalently, gravitational time dilation).
https://en.wikipedia.org/wiki/Pound%E2%80%93Rebka_experiment

In an older era, it was used to produce shotgun pellets.
See: https://en.wikipedia.org/wiki/Shot_tower