Search for CP Violation and Measurement of the Branching Fraction in the Decay D0 → KS0 KS0

Belle Collaboration

Research output: Contribution to journalArticle

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Abstract

We report a study of the decay D0→KS0KS0 using 921 fb-1 of data collected at or near the (4S) and (5S) resonances with the Belle detector at the KEKB asymmetric energy e+e- collider. The measured time-integrated CP asymmetry is ACP(D0→KS0KS0)=(-0.02±1.53±0.02±0.17)%, and the branching fraction is B(D0→KS0KS0)=(1.321±0.023±0.036±0.044)×10-4, where the first uncertainty is statistical, the second is systematic, and the third is due to the normalization mode (D0→KS0π0). These results are significantly more precise than previous measurements available for this mode. The ACP measurement is consistent with the standard model expectation.

Original languageEnglish
Article number171801
JournalPhysical Review Letters
Volume119
Issue number17
DOIs
Publication statusPublished - 2017 Oct 23

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CP violation
decay
asymmetry
detectors
energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Search for CP Violation and Measurement of the Branching Fraction in the Decay D0 → KS0 KS0. / Belle Collaboration.

In: Physical Review Letters, Vol. 119, No. 17, 171801, 23.10.2017.

Research output: Contribution to journalArticle

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title = "Search for CP Violation and Measurement of the Branching Fraction in the Decay D0 → KS0 KS0",
abstract = "We report a study of the decay D0→KS0KS0 using 921 fb-1 of data collected at or near the (4S) and (5S) resonances with the Belle detector at the KEKB asymmetric energy e+e- collider. The measured time-integrated CP asymmetry is ACP(D0→KS0KS0)=(-0.02±1.53±0.02±0.17){\%}, and the branching fraction is B(D0→KS0KS0)=(1.321±0.023±0.036±0.044)×10-4, where the first uncertainty is statistical, the second is systematic, and the third is due to the normalization mode (D0→KS0π0). These results are significantly more precise than previous measurements available for this mode. The ACP measurement is consistent with the standard model expectation.",
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AU - Belle Collaboration

AU - Dash, N.

AU - Bahinipati, S.

AU - Bhardwaj, V.

AU - Trabelsi, K.

AU - Adachi, I.

AU - Aihara, H.

AU - Al Said, S.

AU - Asner, D. M.

AU - Aulchenko, V.

AU - Aushev, T.

AU - Ayad, R.

AU - Babu, V.

AU - Badhrees, I.

AU - Bakich, A. M.

AU - Bansal, V.

AU - Barberio, E.

AU - Bhuyan, B.

AU - Biswal, J.

AU - Bobrov, A.

AU - Bondar, A.

AU - Bonvicini, G.

AU - Bozek, A.

AU - Bračko, M.

AU - Breibeck, F.

AU - Browder, T. E.

AU - Červenkov, D.

AU - Chang, M. C.

AU - Chekelian, V.

AU - Chen, A.

AU - Cheon, B. G.

AU - Chilikin, K.

AU - Cho, K.

AU - Choi, Y.

AU - Cinabro, D.

AU - Di Carlo, S.

AU - DoleŽal, Z.

AU - Drásal, Z.

AU - Dutta, D.

AU - Eidelman, S.

AU - Epifanov, D.

AU - Farhat, H.

AU - Fast, J. E.

AU - Ferber, T.

AU - Fulsom, B. G.

AU - Gaur, V.

AU - Gabyshev, N.

AU - Garmash, A.

AU - Gillard, R.

AU - Goldenzweig, P.

AU - Won, Eunil

PY - 2017/10/23

Y1 - 2017/10/23

N2 - We report a study of the decay D0→KS0KS0 using 921 fb-1 of data collected at or near the (4S) and (5S) resonances with the Belle detector at the KEKB asymmetric energy e+e- collider. The measured time-integrated CP asymmetry is ACP(D0→KS0KS0)=(-0.02±1.53±0.02±0.17)%, and the branching fraction is B(D0→KS0KS0)=(1.321±0.023±0.036±0.044)×10-4, where the first uncertainty is statistical, the second is systematic, and the third is due to the normalization mode (D0→KS0π0). These results are significantly more precise than previous measurements available for this mode. The ACP measurement is consistent with the standard model expectation.

AB - We report a study of the decay D0→KS0KS0 using 921 fb-1 of data collected at or near the (4S) and (5S) resonances with the Belle detector at the KEKB asymmetric energy e+e- collider. The measured time-integrated CP asymmetry is ACP(D0→KS0KS0)=(-0.02±1.53±0.02±0.17)%, and the branching fraction is B(D0→KS0KS0)=(1.321±0.023±0.036±0.044)×10-4, where the first uncertainty is statistical, the second is systematic, and the third is due to the normalization mode (D0→KS0π0). These results are significantly more precise than previous measurements available for this mode. The ACP measurement is consistent with the standard model expectation.

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