Personal practices of meditation During practice of meditation when notice thoughts disappear . experience peace and happy . innerconversation has lost. what is this state?
The state described is basic samadhi ('concentration'; 'collectedness'), which ideally is to be maintained &amp; developed when meditating. MN 19 describes about how the Buddha-To-Be developed samadhi, in the following manner:

I steadied my mind internally, quieted it, brought it to singleness, and concentrated it...So that my mind was not strained. Tireless energy was aroused in me and unremitting mindfulness was established, my body was tranquil and untroubled, my mind concentrated and unified. Quite secluded from sensual pleasures, secluded from unwholesome states, I entered upon and abided in the first jhāna, which is accompanied by applied and sustained mind, with rapture and pleasure born of seclusion.
MN 19