Study of D{sup o} - D{sup o} mixing in hadronic modes

The authors report on a search for D{sup 0} - {bar D}{sup 0} mixing in the K{pi} and K{pi}{pi}{pi} decay modes. Since D{sup 0} - {bar D}{sup 0} mixing is believed to be small in the Standard Model, the presence of a signal could be an indication of new physics. The large E791 D{sup 0} sample allows greater sensitivity in this search than has been previously possible. The measurement is also sensitive to Doubly Cabibbo Suppressed Decay (DCSD) which complicates the limits that one can place on mixing. The authors present results on both mixing and DCSD and their possible interference.