We measure the time-integrated CP asymmetry in D0 → K0 S K0 S decays reconstructed in eþe− → c¯c events collected by the Belle and Belle II experiments. The corresponding data samples have integrated luminosities of 980 and 428 fb−1, respectively. The D0 decays are required to originate from the D þ → D0πþ decay, which determines the charm flavor at production time. A control sample of D0 → KþK− decays is used to correct for production and detection asymmetries. The result, ð−1.4 1.3ðstatÞ 0.1ðsystÞÞ%, is consistent with previous determinations and with CP symmetry.

Measurement of the time-integrated CP asymmetry in D0 → KS0 KS0 decays using Belle and Belle II data

A. Boschetti;S. Das;M. Destefanis;M. Maggiora;S. Marcello;S. Spataro;
2025-01-01

Abstract

We measure the time-integrated CP asymmetry in D0 → K0 S K0 S decays reconstructed in eþe− → c¯c events collected by the Belle and Belle II experiments. The corresponding data samples have integrated luminosities of 980 and 428 fb−1, respectively. The D0 decays are required to originate from the D þ → D0πþ decay, which determines the charm flavor at production time. A control sample of D0 → KþK− decays is used to correct for production and detection asymmetries. The result, ð−1.4 1.3ðstatÞ 0.1ðsystÞÞ%, is consistent with previous determinations and with CP symmetry.
2025
111
1
012015-1
012015-11
https://journals.aps.org/prd/pdf/10.1103/PhysRevD.111.012015
CP violation
I. Adachi , L. Aggarwal , H. Ahmed , H. Aihara , N. Akopov , A. Aloisio , N. Althubiti , N. Anh Ky , D. M. Asner , H. Atmacan , V. Aushev , M. Aversa...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/2070713
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