No. But they do have energy, and that creates gravity in general relativity (if I understand it correctly). But also, you could have a Zeno's Paradox of parti

No. But they do have energy, and that creates gravity in general relativity (if I understand it correctly). But also, you could have a Zeno's Paradox of particles - one with half the energy, one with 1/4th the energy, one with 1/8th...