White and Havertz scored braces to batter their London rivals 5-0
The Gunners, who have now lost four straight home games, are in 15th place in the standings with 13 points while Burnley climb out of the bottom three moving up to 17th place on nine points after their first away win of the season.
Westwood created the decisive goal when his dangerous in-swinging corner was headed into his own goal by Aubameyang as he rose to challenge Josh Brownhill at the near post.