Measurement of the branching fraction and search for CP violation in D0 → KS0KS0π+π− decays at Belle

Sangal A.; Schwartz A. J.; Aihara H.; Al Said S.; Asner D. M.; Atmacan H.; Aulchenko V.; T. Aushev; D. Bodrov; R. Mizuk; P. Pakhlov; G. Pakhlova; T. Uglov

doi:10.1103/PhysRevD.107.052001

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Measurement of the branching fraction and search for CP violation in D0 → KS0KS0π+π− decays at Belle

Physical Review D - Particles, Fields, Gravitation and Cosmology. 2023. Vol. 107. No. 5. Article 052001.

Sangal A., Schwartz A. J., Aihara H., Al Said S., Asner D. M., Atmacan H., Aulchenko V., T. Aushev, D. Bodrov, R. Mizuk, P. Pakhlov, G. Pakhlova, T. Uglov

We measure the branching fraction for the Cabibbo-suppressed decay D0 -> K0SK0S pi+pi- and search for CP violation via a measurement of the CP asymmetry ACP as well as the T-odd triple-product asymmetry aTCP. We use 922 fb-1 of data recorded by the Belle experiment, which ran at the KEKB asymmetric-energy e+e- collider. The branching fraction is measured relative to the Cabibbo-favored normalization channel D0 -> K0S pi+pi-; the result is B(D0 -> K0SK0S pi+pi-)=[4.79 +/- 0.08(stat)+/- 0.10(syst)+/- 0.31(norm)]x10-4, where the first uncertainty is statistical, the second is systematic, and the third is from uncertainty in the normalization channel. We also measure ACP=[-2.51 +/- 1.44(stat)+0.11-0.10(syst)]%, and aTCP=[-1.95 +/- 1.42(stat)+0.14-0.12(syst)]%. These results show no evidence of CP violation.

Research target: Physics

Language: English

DOI

Keywords: CP violation Electroweak interaction Belle detector Branching fraction Charmed mesons

Publication based on the results of:

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