Antiparticle used in a sentence

Antiparticle in a sentence as a noun

> For a particle to be its own antiparticle, it would have to have spin 1/2This is wrong.

The W+/W- have spin 1 and are eachother's antiparticle.

How then would antimatter fall upwards ~because~ it is the antiparticle of matter?

Which is why using the vacuum fluctuations makes sense – these are particle/antiparticle pairs created randomly in the vacuum.

Since a photon is its own antiparticle, you might imagine that a photon and an electron "bounce" off of each other in time, and both reverse their directions.

My question here is, wouldn't the particle/antiparticles that get split happen in equal amounts for a net zero radiative effect?

Basically a pair of particle/antiparticle randomly appears near the black hole event horizon, one of the particle falls into the black hole while the other one escapes.

This photon then randomly hits a particle X of a particle-antiparticle pair and transfers its momentum/energy to the particle X, creating/altering it into a particle X'.

In 1928 Paul Dirac formulated a relativistic quantum theory for the electron and realized that this theory predicted an antiparticle, the positron, and four years later it was actually discovered.