I have two recipes (so far) for poaching chicken breasts, one from ATK and one from NYT. This first one is from ATK, called "Perfect Poached Chicken Breasts. It starts them in cold water in a dutch oven, heats the water up and then turns the heat off. This is a PDF:
Click here for the ATK Perfect Poached Chicken Breasts recipe
This next one is from NYT and is a fairly standard one, put them into a pan with water, bring to a boil and simmer until done. This is also a PDF.