Photographic element containing yellow dye-forming coupler comprising a dye light stability enhancing ballast and process

A photographic element comprising a light sensitive silver halide emulsion layer having associated therewith an open chain alpha -carbonyl acetanilide yellow dye-forming coupler having the formula: rom the group consisting of alkyl, aryl, heterocyclic, and amino groups, provided that R1 may form a ring bonded to another carbon atom which is a member of Ring "A"; each R2 is independently selected from the group consisting of those substituents having a Hammett's sigma value of 0 or less, and m is from 0 to 4; Ring "A" is bonded indirectly to the 3-, 4-, or 5-position of Ring "B"; Z is hydrogen, or a group capable of coupling-off when the coupler reacts with an oxidized color developing agent said coupling-off group selected from the group consisting of: (a) an arylthio group; (b) a heterocyclic group containing, in a five or six membered ring, one or two nitrogen atoms, wherein the group Z is bonded to the remainder of the coupler through a nitrogen atom in the ring; and (c) a benzotriazole group wherein the group Z is bonded to the remainder of the coupler through a nitrogen atom in the triazole group.