Barrett, who also had eight rebounds, made five of six foul shots to help the Lady Tigers pull away over the final 3 1/2 minutes. Destiny Hughes added 10 points, three rebounds and two assists.
Tia Magee had 12 points during another rough game for the Hoyas (1-2), who shot 24 percent from the field and committed 23 turnovers. Sugar Rodgers went 4 for 20 to finish with 10 points.
Georgetown shot 33 percent from the field during Sunday’s 72-53 loss at Maryland.
LSU (2-0) also struggled offensively, shooting 34 percent and committing 26 turnovers. But it put together a 6-0 spurt after the Hoyas pulled within four late in the game. Courtney Jones had a free throw and a field goal, while Barrett made three foul shots during the key stretch.
The Hoyas’ only points in the last 3 1/2 minutes came on a 3-pointer by Magee. Two free throws by Taylor Turnbow and Barrett completed the scoring for LSU.
Georgetown used a 6-0 run to tie it at 32 with 13:58 left in the game. Adria Crawford, Rubylee Wright and Magee scored on three straight possessions for the Hoyas. The Lady Tigers regained the lead on a field goal by Adrienne Webb.