| Preprint | |
| Report number | arXiv:1903.10638 |
| Title | Implications on the first observation of charm CPV at LHCb |
| Author(s) | Li, Hsiang-Nan (Taiwan, Inst. Phys.) ; Lü, Cai-Dian (Beijing, Inst. High Energy Phys.) ; Yu, Fu-Sheng (Lanzhou U.) |
| Imprint | 2019-03-25 |
| Number of pages | 10 |
| Note | 10 pages |
| Subject category | hep-ex ; Particle Physics - Experiment ; hep-ph ; Particle Physics - Phenomenology |
| Accelerator/Facility, Experiment | CERN LHC ; LHCb |
| Abstract | Very recently, the LHCb Collaboration observed the $CP$ violation (CPV) in the charm sector for the first time, with $\Delta A_{CP}^{\rm dir}\equiv A_{CP}(D^0\to K^+K^-)-A_{CP}(D^0\to \pi^+\pi^-)=(-1.54\pm0.29)\times10^{-3}$. This result is consistent with our prediction of $\Delta A_{CP}^{\rm SM}=(-0.57\sim -1.87)\times 10^{-3}$ obtained in the factorization-assisted topological-amplitude (FAT) approach in [PRD86,036012(2012)]. It implies that the current understanding of the penguin dynamics in charm decays in the Standard Model is reasonable. Motivated by the success of the FAT approach, we further suggest to measure the $D^+\to K^+K^-\pi^+$ decay, which is the next potential mode to reveal the CPV of the same order as $10^{-3}$. |
| Other source | Inspire |
| Copyright/License | preprint: (License: arXiv nonexclusive-distrib 1.0) |
Record created 2021-03-27, last modified 2021-03-29
