The comic payoffs arrive only sporadically in the new production of Joe Orton’s “Loot” at the Lucille Lortel Theater. Those deliciously perverse epigrams whiz through the air, and the corpse of a beloved wife is frantically hauled about a parlor like a medicine ball being flung around at a gym. But the deadpan style that best serves these antics often slips into a kind of winking archness that announces an awareness of the inspired lunacy of it all. The production, directed by Jesse Berger for the Red Bull Theater, hits its marks with an air of studied effort that tends to put the brakes on the mayhem.