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Measurement of CP asymmetry in D0 → K0S K0S decays with the LHCb Run 3 detector

A measurement of CP asymmetry in D0 → K0S K0S decays is reported, based on a data sample of proton-proton collisions collected with the LHCb detector in 2024 at a centre-of-mass energy of 13.6TeV, corresponding to an integrated luminosity of 6.2fb−1. The D0 → K0Sπ+π− decay is used as calibration cha...

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Autori principali: Aaij, Roel (Autore) , Bachmann, Sebastian (Autore) , Carus, Leon (Autore) , Caspary, Rowina (Autore) , Celani, Sara (Autore) , Cocha Toapaxi, Carlos (Autore) , Dittmann, Lucas (Autore) , Esen, Sevda (Autore) , Glaser, Fabian (Autore) , Günther, Paul André (Autore) , Han, Xiaoxue (Autore) , Hansmann-Menzemer, Stephanie (Autore) , Herrero Gascón, Paula (Autore) , Kolb, Ruben (Autore) , Langenbruch, Christoph (Autore) , Leverington, Blake (Autore) , Marks, Jörg (Autore) , Morgenthaler, Maurice Pierre (Autore) , Roy, Shreya (Autore) , Ruiz Diaz, Miguel (Autore) , Schiller, Manuel (Autore) , Tat, Martin Duy (Autore) , Tuci, Giulia (Autore) , Uecker, Lennart Henning (Autore) , Unverzagt, Daniel Joachim (Autore) , Uwer, Ulrich (Autore) , Wang, Chishuai (Autore) , Wolf, Tom (Autore) , Zhao, Ya (Autore) , Zhelezov, Alexey (Autore)
Natura: Article (Journal)
Lingua:inglese
Pubblicazione: 26. Februar 2026
In: Journal of high energy physics
Year: 2026, Volume: 2026, Fascicolo: 2, Pages: 1-24
ISSN:1029-8479
DOI:10.1007/JHEP02(2026)253
Accesso online:Resolving-System, kostenfrei, Volltext: https://doi.org/10.1007/JHEP02(2026)253
Verlag, kostenfrei, Volltext: https://link.springer.com/article/10.1007/jhep02(2026)253
Testo
Note sull'autore:R.Aaij, S.Bachmann, L. Carus, R. Caspary, S. Celani, C. Cocha Toapaxi, L. Dittmann, S. Esen, F.C. Glaser, P.A. Günther, X.Han, S. Hansmann-Menzemer, P. Herrero Gascon, R. Kolb, C. Langenbruch, B. Leverington, J. Marks, M.P. Morgenthaler, S. Roy, M. Ruiz Diaz, M. Schiller, M.D. Tat, G. Tuci, L.H. Uecker, D.J. Unverzagt, U. Uwer, C. Wang, T. Wolf, Y. Zhao, A. Zhelezov [und 1181 weitere]
Descrizione
Riassunto:A measurement of CP asymmetry in D0 → K0S K0S decays is reported, based on a data sample of proton-proton collisions collected with the LHCb detector in 2024 at a centre-of-mass energy of 13.6TeV, corresponding to an integrated luminosity of 6.2fb−1. The D0 → K0Sπ+π− decay is used as calibration channel to cancel residual detection and production asymmetries. The time-integrated CP asymmetry for the D0 → K0S K0S mode is measured to be ACP(D0 →K0S K0S) = (1.86±1.04±0.41)%, where the first uncertainty is statistical, and the second is systematic. This measurement represents the most precise single-experiment determination of this quantity to date.
Descrizione del documento:Im Titel ist jeweils die 0 hochgestellt und das S tiefgestellt
Gesehen am 17.09.2026
Descrizione fisica:Online Resource
ISSN:1029-8479
DOI:10.1007/JHEP02(2026)253

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