Measurement of CP asymmetry in D0→K0SK0S decays

Aaij, R, Abellan, Beteta C, Adametz, A, Adeva, B, Adinolfi, M, Adrover, C, Affolder, A, Ajaltouni, Z, Albrecht, J, Alessio, F
et al (show 121 more authors) (2021) Measurement of CP asymmetry in D0→K0SK0S decays. Phys. Rev. Lett. 110,, 031801 (3). 031801-031801.

Access the full-text of this item by clicking on the Open Access link.
[thumbnail of 2105.01565v2.pdf] Text
2105.01565v2.pdf - Submitted version

Download (535kB) | Preview


A measurement of the $CP$ asymmetry in $D^0 \to K^0_S K^0_S$ decays is reported, based on a data sample of proton-proton collisions collected by the LHCb experiment from 2015 to 2018, corresponding to an integrated luminosity of 6 fb$^{-1}$. The flavor of the $D^0$ candidate is determined using the charge of the $D^{*\pm}$ meson, from which the decay is required to originate. The $D^0 \to K^+ K^-$ decay is used as a calibration channel. The time-integrated $CP$ asymmetry for the $D^0 \to K^0_S K^0_S$ mode is measured to be: $$A^{CP}(D^0 \to K^0_S K^0_S) = (-3.1\pm 1.2\pm 0.4 \pm 0.2)\%, $$ where the first uncertainty is statistical, the second is systematic, and the third is due to the uncertainty on the $CP$ asymmetry of the calibration channel. This is the most precise determination of this quantity to date.

Item Type: Article
Additional Information: ## TULIP Type: Articles/Papers (Journal) ##
Uncontrolled Keywords: hep-ex, hep-ex
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 16 Dec 2021 13:22
Last Modified: 14 Mar 2024 22:58
DOI: 10.1103/PhysRevD.104.L031102
Open Access URL:
Related URLs: