We present a search for the "wrong-sign" decay D 0 →K + π - π + π - using 9 fb -1 of e + e - collisions on and just below the Y(4S) resonance. This decay can occur either through a doubly Cabibbo-suppressed process or through mixing to a D̄ 0 followed by a Cabibbo-favored process. Our result for the time-integrated wrong-sign rate relative to the decay D 0 →K - π + π - π + is (0.0041 -0.0011 +0.0012 (stat)±0.0004(syst)) ×(1.07±0.10)(phase space), which has a statistical significance of 3.9 standard deviations.
|Original language||English (US)|
|Number of pages||5|
|Journal||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|State||Published - Dec 1 2001|