refTN, don't you own a rule book?
4-28-3
The jump ball begins when the ball leaves the referee's hand(s) and ends when the touched ball contacts a nonjumper, the floor, a basket or backboard.
6-3-7
Neither jumper shall:
a. Touch the tossed ball before it reaches its highest point.
b. Leave the center restraining circle until the ball has been touched.
c. Catch the jump ball.
d. Touch the ball more than twice.
The jump ball and these restrictions end when the touched ball contacts one of the eight nonjumpers, the floor, a basket or backboard.