Speaker
Prof.
Ignacio De Bediaga Hickman
(CBPF - Brazilian Center for Physics Research (BR))
Description
We show that final state interactions (FSI) within a CPT invariant two-channel framework can enhance the charge-parity (CP) violation difference between $D^0\to\pi^-\pi^+$ and $D^0\to K^-K^+$ decays up to the current experimental value.
This result relies upon:
(i) the dominant tree level diagram,
(ii) the well known experimental values for the $D^ 0\to\pi^-\pi^+$ and $D^ 0\to K^-K^+$ branching ratios, and
(iii) the $\pi\pi \to \pi\pi$ and $\pi\pi \to K K $ scattering data to extract the strong phase difference and inelasticity. Based on well-grounded theoretical properties, we find the sign and bulk value of the $\Delta A_{CP}$ and $A_{CP}(D^0 \to \pi^-\pi^+)$ recently observed by the LHCb collaboration.
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Authors
Prof.
Ignacio De Bediaga Hickman
(CBPF - Brazilian Center for Physics Research (BR))
Patricia Magalhaes
(UNICAMP)
Tobias Frederico