Details

Autor(en) / Beteiligte

• Jiang, Hua-Yu
• Yu, Fu-Sheng
• Qin, Qin
• Li, Hsiang-nan
• Lü, Cai-Dian

Titel

D0-D̄0 mixing parameter y in the factorization-assisted topological-amplitude approach Supported by National Natural Science Foundation of China (11347027, 11505083, 11375208, 11521505, 1162113100, 11235005, U1732101), Ministry of Science and Technology of R.O.C. (MOST-104-2112-M-001-037-MY3) and DFG Forschergruppe FOR 1873 "Quark Flavour Physics and Effective Field Theories"

Ist Teil von

• Chinese physics C, 2018-05, Vol.42 (6)

Ort / Verlag

Chinese Physical Society and the Institute of High Energy Physics of the Chinese Academy of Sciences and the Institute of Modern Physics of the Chinese Academy of Sciences and IOP Publishing Ltd

Erscheinungsjahr

2018

Link zum Volltext

Quelle

Electronic Journals Library

Beschreibungen/Notizen

• We calculate the D 0 - D ¯ 0 mixing parameter y in the factorization-assisted topological-amplitude (FAT) approach, considering contributions from D 0 → PP , PV, and VV modes, where P (V) stands for a pseudoscalar (vector) meson. The D 0 → PP and PV decay amplitudes are extracted in the FAT approach, and the D 0 → VV decay amplitudes with final states in the longitudinal polarization are estimated via the parameter set for D 0 → PV . It is found that the VV contribution to y, being of order of 10−4, is negligible, and that the PP and PV contributions amount only up to y PP+PV = ( 0.21 ± 0.07 ) % , a prediction more precise than those previously obtained in the literature, and much lower than the experimental data y exp = ( 0.61 ± 0.08 ) % . We conclude that D0 meson decays into other two-body and multi-particle final states are relevant to the evaluation of y, so it is difficult to understand it fully in an exclusive approach.