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《中国物理C》(英文)编辑部
2024年10月30日

D0-D0 mixing parameter y in the factorization-assisted topological-amplitude approach

  • We calculate the D0-D0 mixing parameter y in the factorization-assisted topological-amplitude (FAT) approach,considering contributions from D0→PP,PV,and VV modes,where P (V) stands for a pseudoscalar (vector) meson.The D0→PP and PV decay amplitudes are extracted in the FAT approach,and the D0→VV decay amplitudes with flnal states in the longitudinal polarization are estimated via the parameter set for D0→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 yPP+PV=(0.21±0.07)%,a prediction more precise than those previously obtained in the literature, and much lower than the experimental data yexp=(0.61±0.08)%.We conclude that D0 meson decays into other two-body and multi-particle flnal states are relevant to the evaluation of y,so it is difficult to understand it fully in an exclusive approach.
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Hua-Yu Jiang, Fu-Sheng Yu, Qin Qin, Hsiang-nan Li and Cai-Dian Lü. D0-D0 mixing parameter y in the factorization-assisted topological-amplitude approach[J]. Chinese Physics C, 2018, 42(6): 063101. doi: 10.1088/1674-1137/42/6/063101
Hua-Yu Jiang, Fu-Sheng Yu, Qin Qin, Hsiang-nan Li and Cai-Dian Lü. D0-D0 mixing parameter y in the factorization-assisted topological-amplitude approach[J]. Chinese Physics C, 2018, 42(6): 063101.  doi: 10.1088/1674-1137/42/6/063101 shu
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Received: 2018-03-09
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    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 Efiective Field Theories

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D0-D0 mixing parameter y in the factorization-assisted topological-amplitude approach

  • 1.  School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000
  • 2. School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000
  • 3. Research Center for Hadron and CSR Physics, Lanzhou University and Institute of Modern Physics of CAS, Lanzhou 730000
  • 4. Theoretische Physik 1, Naturwissenschaftlich-Technische Fakultä
  • 5. Institute of High Energy Physics, P. O. Box 918(4), Chinese Academy of Sciences, Beijing 100049
  • 6.  Institute of Physics, Academia Sinica, Taipei 11529
  • 7. 
Fund Project:  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 Efiective Field Theories

Abstract: We calculate the D0-D0 mixing parameter y in the factorization-assisted topological-amplitude (FAT) approach,considering contributions from D0→PP,PV,and VV modes,where P (V) stands for a pseudoscalar (vector) meson.The D0→PP and PV decay amplitudes are extracted in the FAT approach,and the D0→VV decay amplitudes with flnal states in the longitudinal polarization are estimated via the parameter set for D0→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 yPP+PV=(0.21±0.07)%,a prediction more precise than those previously obtained in the literature, and much lower than the experimental data yexp=(0.61±0.08)%.We conclude that D0 meson decays into other two-body and multi-particle flnal states are relevant to the evaluation of y,so it is difficult to understand it fully in an exclusive approach.

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