Do hops make you sleepy?

I'm curious to know if there's any scientific basis to the belief that hops can make you sleepy. I've heard people say that drinking beer, which contains hops, can make them feel drowsy. But is it really the hops that are responsible for this effect, or could it be something else in the beer? I'd like to understand the chemistry behind it and whether there's any research that supports the idea that hops have a sedative effect on humans. Is there a specific compound in hops that's responsible for this, or is it more complex than that? I'm looking forward to hearing your insights on this intriguing question.