2014/11/03 by Sabato Leo, Leo, Sabato
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.1411.0623
openalex publication_date 2014/11/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
I report on a measurement of \CP-violating asymmetries (AΓ) between effective lifetimes of D0 or D0 in fully reconstructed D0→ K+ K- and D0→ π+π- decays collected in pp collisions by the Collider Detector at Fermilab experiment. The full CDF data set corresponding to 9.7 fb-1 of integrated luminosity is used. The flavor of the charm meson at production is determined by exploiting the strong-interaction decay D*+ → D0 π+, while the contamination from mesons originated in b-hadron decays is evaluated and subtracted from the sample. Signal yields as functions of the observed decay-time distributions are extracted from maximum likelihood fits and used to measure the asymmetries. The results, AΓ(K+K-) = (-1.9 ± 1.5 (stat) ± 0.4 (syst) )×10-3 and AΓ(π+π-)= (-0.1 ± 1.8 (stat) ± 0.3 (syst) )×10-3, and their combination, AΓ= (-1.2 ± 1.2)×10-3, are consistent with the SM predictions and other experimental determinations.