2026-04-13T07:39:02Zhttps://recercat.cat/oai/request

oai:recercat.cat:20.500.14342/60832026-03-20T01:12:29Zcom_2072_482405com_2072_183628col_2072_482415

2026-03-20T01:12:29Z urn:hdl:20.500.14342/6083 Measurement of CP asymmetry in D0→KS0KS0 decays with Run 3 data Calvo Gomez, Miriam Golobardes Ribé, Elisabet Vilasis-Cardona, Xavier LHCb Collaboration - CERN Accelerator physics Circular dichroism spectroscopy Deoxy sugar Experimental nuclear physics Nuclear physics Particle physics Gran col·lisionador d'hadrons (França i Suïssa) A measurement of CP asymmetry in D0→KS0KS0 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 13.6 TeV, corresponding to an integrated luminosity of 6.2 fb−1. The D0→KS0π+π− decay is used as calibration channel to cancel residual detection and production asymmetries. The time-integrated CP asymmetry for the D0→KS0KS0 mode is measured to be (Formula presented.) 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. 2026-03-20T01:12:29Z 2026-03-20T01:12:29Z 2025-10-21 2026-02-26 info:eu-repo/semantics/article 1029-8479 https://hdl.handle.net/20.500.14342/6083 https://doi.org/10.1007/JHEP02(2026)253 eng Journal of High Energy Physics, 2026. 253 http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess © CERN Attribution 4.0 International Springer