2026-04-17T05:43:32Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/2206342025-12-05T16:12:40Zcom_2072_1057col_2072_478823col_2072_478904col_2072_478917

00925njm 22002777a 4500 dc Aaij, R. author Alfonso Albero, Alejandro author Garcia Moreno, Paula author Garrido Beltrán, Lluís author Gironella Gironell, Pere author Gomez Fernandez, S. author Graugés Pous, Eugeni author Lobo Salvia, Aniol author Marin Benito, Carla author Mauricio, J. author Vazquez Gomez, Ricardo author LHCb collaboration author 2025-04-25T14:10:26Z 2025-04-25T14:10:26Z 2023 2025-04-25T14:10:26Z Searches for CP violation in the decays D + (s) → ηπ+ and D + (s) → η 0π + are performed using pp collision data corresponding to 6 fb−1 of integrated luminosity collected by the LHCb experiment. The calibration channels D + (s) → φπ+ are used to remove production and detection asymmetries. The resulting CP-violating asymmetries are A CP (D+ → ηπ+) = (0.34 ± 0.66 ± 0.16 ± 0.05)%, A CP (D+ s → ηπ+) = (0.32 ± 0.51 ± 0.12)%, A CP (D+ → η 0π +) = (0.49 ± 0.18 ± 0.06 ± 0.05)%, A CP (D+ s → η 0π +) = (0.01 ± 0.12 ± 0.08)%, where the first uncertainty is statistical, the second is systematic and the third, relevant for the D+ channels, is due to the uncertainty on ACP (D+ → φπ+). These measurements, currently the most precise for three of the four channels considered, are consistent with the absence of CP violation. A combination of these results with previous LHCb measurements is presented. Hadrons Física de partícules Hadrons Particle physics Measurement of CP asymmetries in D+ (s) → ηπ+ and D+ (s) → η 0π + decays