Team A takes the ball out of bounds at half court to start the second half. The inbounder throws the ball clear under his own bucket where a team A player and a team B player both catches the ball and come down with it simultaneously. A jump ball is called.

Who should get the ball? Is it alternating possession and team B gets the ball or does team A get the ball again because there is no possession yet?

Thanks in advance

6-4-4 - "The direction of the possession arrow is reversed immediately after an alternating-possession throw-in ends. An alternating-possession throw-in ends when the throw-in ends [40-40-5] or when the throw-in team violates."

Arrow points to B when touched.
Held ball.
Ball to B.