I have a $d$-uniform hypergraph on $n$ vertices with $k$ hyperedges, where $d << k$ and $n = 4k d^2$ or so. The hyperedges are placed independently uniformly at random. I would like to have a handle on the behavior of the sizes of the connected components. By "size" I refer to the number of edges in the component, but understanding the number of vertices would be fine too.
For instance, if $X$ is the size of the component containing the first hyperedge, it seems like we should have $\Pr[X > t] < 1/2^t$. This is because each hyperedge has a less than $1/4$ chance of intersecting any other hyperedge, so this seems like some sort of exponentially decaying branching process.
Furthermore, it seems like there should be a negative association among component sizes: the larger one component is, the smaller the other ones are. Suppose I give each component in the graph a unique random label in $[k]$, and let $Y_i$ be the size of the component labeled $i$ (or 0 if no component has label $i$). Then I expect that $E[Y_i | Y_j = t]$ for $j \neq i$ is decreasing in $t$. Moreover, I expect that the random variable $(Y_i | Y_j = t)$ is decreasing in $t$: the variable with small $t$ dominates the variable with large $t$.
But I'm not sure how to rigorously show either property.
