There is no direct equivalent in English that captures the same playful and affectionate tone. Here are a few options depending on the context:
Formal:
* Hello there.
* Greetings.
Informal:
* Hey there, peanut. (This is the closest equivalent, but it may not be as widely understood)
* Hey, sweetie.
* Hi, there.
* Hello, beautiful/handsome.
* Hey you.
You could also try using:
* Hey, my little/big one.
* Good to see you!
The best translation will depend on the situation and your relationship with the person you are speaking to.