Using a sample of four million hadronic Z events collected in ALEPH from 1991 to 1995, the decays , with D0 decaying to K−π+ or to K+π−, are studied. The relative branching ratio B(D0→K+π−)/B(D0→K−π+) is measured to be The two possible contributions to the D0→K+π− decay, doubly Cabibbo-suppressed decays and D0– mixing, are disentangled by measuring the proper-time distribution of the reconstructed D0's. Assuming no interference between the two processes, the upper limit obtained on the mixing rate is 0.92% . The possible effect of interference between the two amplitudes is also assessed.

Study of D0–antiD0 mixing and D0 doubly Cabibbo-suppressed decays / R Barate, D Buskulic, D Decamp, P Ghez, C Goy, J.-P Lees, A Lucotte, E Merle, M.-N Minard, J.-Y Nief, B Pietrzyk, R Alemany, G Boix, M.P Casado, M Chmeissani, J.M Crespo, M Delfino, E Fernandez, M Fernandez-Bosman, Ll Garrido, et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - ELETTRONICO. - 436:(1998), pp. 211-221. [10.1016/S0370-2693(98)00946-0]

Study of D0–antiD0 mixing and D0 doubly Cabibbo-suppressed decays

FOCARDI, ETTORE;CIULLI, VITALIANO;
1998

Abstract

Using a sample of four million hadronic Z events collected in ALEPH from 1991 to 1995, the decays , with D0 decaying to K−π+ or to K+π−, are studied. The relative branching ratio B(D0→K+π−)/B(D0→K−π+) is measured to be The two possible contributions to the D0→K+π− decay, doubly Cabibbo-suppressed decays and D0– mixing, are disentangled by measuring the proper-time distribution of the reconstructed D0's. Assuming no interference between the two processes, the upper limit obtained on the mixing rate is 0.92% . The possible effect of interference between the two amplitudes is also assessed.
1998
436
211
221
R Barate;D Buskulic;D Decamp;P Ghez;C Goy;J.-P Lees;A Lucotte;E Merle;M.-N Minard;J.-Y Nief;B Pietrzyk;R Alemany;G Boix;M.P Casado;M Ch...espandi
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Utilizza questo identificatore per citare o creare un link a questa risorsa: https://hdl.handle.net/2158/639094
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