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The charm quark offers interesting opportunities to cross-check the mechanismof CP violation precisely tested in the strange and beauty sectors. In thispaper, we exploit the angular and quantum correlations in the D\bar{D} pairsproduced through the decay of the psi(3770) resonance in a charm factory toinvestigate CP-violation in two different ways. We build CP-violatingobservables in psi(3770) -> D\bar{D} -> (V_1V_2)(V_3 V_4) to isolate specificNew Physics effects in the charm sector. We also consider the case of psi(3770)-> D\bar{D} -> (V_1V_2)(K\pi) decays, which provide a new way to measure thestrong phase difference delta between Cabibbo-favored and doubly-Cabibbosuppressed D decays required in the determination of the CKM angle gamma.Neglecting the systematics, we give a first rough estimate of the sensitivitiesof these measurements at BES-III with an integrated luminosity of 20 fb^-1 atpsi(3770) peak and at a future Super tau-charm factory with a luminosity of10^35 cm^-2.s^-1.

physical review. d. particles, fields, gravitation, and cosmology/physical review. d, particles, fields, gravitation, and cosmology

Extracting CP violation and strong phase in D decays by using quantum  correlations in psi(3770)-> D0\bar{D}0 -> (V1V2)(V3V4) and  psi(3770)->D0\bar{D}0 -> (V1V2)(K pi)