You are talking here about particle physics and the only place I am aware of that does research in this field is the particle machines at CERN in Switzerland. They research things like antimatter, which is completely, if I am not mistaken, totally theoretical. And no, it cannot be verified by the senses but rather by the complex machinery they developed. The machinery can and does detect it but its very difficult. Can you detect viruses by your five senses or do you admit that viruses can and do cause such things as the cold, URI's, and so on. Do you deny them? and if you do, why do you? They cannot be seen by the eyes, heard by ears, felt by touch, etc. Yet, they exist.