ARLINGTON, Texas — The Eagles believe they have something that is difficult to define and impossible to miss. They’re convinced they’ve rediscovered the chemistry that was so essential when they marched to the Super Bowl two seasons ago and mysteriously disappeared last season.

“We had chemistry when we were 2-2,” running back Saquon Barkley said Sunday after the Eagles won their fifth straight game by beating the reeling Dallas Cowboys 34-7 at AT&T Stadium. “Things just happened. Whipped. We didn’t play our best ball. We were learning a new system. All the excuses we could think of, but we weren’t going to make them. You have to find your way.”