R.P. Scherer Corp. management said it hired Goldman, Sachs & Co. to explore the possible sale or leveraged buyout of the company, a reversal that marks an apparent victory for dissident shareholders led by the daughter of the company’s late founder. The move came two months after the conclusion of a bitter proxy fight won by Karla Scherer Fink, Scherer’s largest shareholder, in an attempt to pressure the board to sell the company. Heading the opposition was Peter Fink, the firm’s president and chief executive and Karla Fink’s estranged husband. Karla Fink controls about 33% of the company’s shares.