Anthony Hickey had 13 points and three steals. Andrew Stringer also scored 13 points while making 3 of 6 3-pointers.
LSU's leading scorer, Shavon Coleman, scored a season-low four points after coming in having recorded back-to-back double-doubles in points and rebounds. He was 2-of-9 shooting but led the team with nine rebounds. Johnny O'Bryant had played just five minutes in the past two games with a lower left leg injury. He had six points and seven rebounds but also committed four turnovers.
"I think his layoff hurt him," Jones said. "He just wasn't fluid enough for us inside or out."
Added O'Bryant: "I didn't feel 100 percent but I went out there and tried to give my team all I could."
LSU closed the 14-point gap mostly with Carmouche's 3s that were too late to muster a real threat.
Auburn's No. 2 scorer, Chris Denson, missed his second straight game with a stress fracture in his left foot.
Payne continued to pick up some of the slack. He had scored a career-high 17 in the last game, a win over Florida State, and also had four assists in this game.
LSU trailed by eight points three times but led 28-27 at halftime and scored the first five points of the second half. That forced Barbee to call a timeout less than a minute after coming out of the locker room.
The game turned after that with the big run.
Auburn spread out the scoring in retaking control of the game with all eight players seeing action scoring at least five points.
Auburn hit 14 of 26 shots (54 percent) in the second half. LSU shot just 37 percent (25 of 67).