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Regular version of the site

Article

Measurement of D0 -D¯ 0 mixing parameters using semileptonic decays of neutral kaon

Journal of High Energy Physics. 2020. Vol. 02. No. 160. P. 1-15.
Pakhlov P., Попов В. Е.

We propose a new method to extract D0−D¯0 mixing parameters using the D0→K¯0π0 decay with the K¯0 reconstructed in the semileptonic mode. Although a K0→π±lνl decay suffers from low statistics and complexity of the secondary vertex reconstruction in comparison to the standard KSπ+π− vertex, it provides much richer, sometimes unique information about the initial state of a K0-meson produced in a heavy-flavor hadron decay. In this paper it is shown that the reconstruction of the chain D0→K0(π±lνl)π0 allows one to extract the strong phase difference between the doubly Cabibbo-suppressed and Cabibbo-favored decay amplitudes, which is of key importance for determination of the D0−D¯0 mixing parameters.