Zazen to get an LSD effect?

In Zen the key practice is sitting meditation (Zazen or 座禅). Is monks' experience in Zazen like the LSD effect (i.e. "ego is dead")? Does Zazen give at least approximately some experience similar to LSD -- perhaps including, for example, "tears, laughter, and then everything becoming clear"? Are there any scientific experiments, books, interviews with scientists about this? I'm looking for, but can't find, any scientific information about it.