Lately I feel that my wife is paying too much attention on our newborn. So much so that she doesn’t even say goodbye to me when I leave for work. How do I tell her that I feel neglected?

Your wife is overcome with love and affection for your newborn and is probably exhausted from giving birth to and taking care of him/her so it's really best to be honest and clear when you tell her. Tell her that you love your baby but you also miss spending time with her, just the two of you. Suggest a date, even just coffee so you can have "we-time"