Using a sample of four million hadronic Z events collected in ALEPH from 1991 to 1995, the decays D*+ → D0π+s, 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 (1.84±0.59(stat.) ±0.34(syst.))%. The two possible contributions to the D0 → K+ π- decay, doubly Cabibbo-suppressed decays and D0-D̄0 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% at 95% CL. The possible effect of interference between the two amplitudes is also assessed.

Barate, R., Buskulic, D., Decamp, D., Ghez, P., Goy, C., Lees, J., et al. (1998). Study of D0-D̄0 mixing and D0 doubly Cabibbo-suppressed decays. PHYSICS LETTERS. SECTION B, 436(1-2), 211-221 [10.1016/S0370-2693(98)00946-0].

Study of D0-D̄0 mixing and D0 doubly Cabibbo-suppressed decays

CARPINELLI, Massimo;
1998

Abstract

Using a sample of four million hadronic Z events collected in ALEPH from 1991 to 1995, the decays D*+ → D0π+s, 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 (1.84±0.59(stat.) ±0.34(syst.))%. The two possible contributions to the D0 → K+ π- decay, doubly Cabibbo-suppressed decays and D0-D̄0 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% at 95% CL. The possible effect of interference between the two amplitudes is also assessed.
Articolo in rivista - Articolo scientifico
Physics
English
1998
436
1-2
211
221
none
Barate, R., Buskulic, D., Decamp, D., Ghez, P., Goy, C., Lees, J., et al. (1998). Study of D0-D̄0 mixing and D0 doubly Cabibbo-suppressed decays. PHYSICS LETTERS. SECTION B, 436(1-2), 211-221 [10.1016/S0370-2693(98)00946-0].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/390084
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