| By analyzing an e+e-annihilation data sample of 2.93 fb-1 collected at the center-of-mass energy of 3.773 GeV with the BESIII detector,we have measured the absolute branching fractions of the singly Cabibbo-suppressed decays D+???0?+,???+ and D0 ???-?+|non-KS0 to be B(D+???0?+)=(2.25?± 0.15±0.13)x 10-3,B(D+????+)=(2.96 ± 0.24 ± 0.14)× 10-3 and B(D0???-?+)=(1.18±0.07 ± 0.04)× 10-3,where the first and second uncertainities are statistical and systematic,respec-tively.The hadronic decay D+????+ is observed for the first time,with significance greater than 10?.Compared to the previous measurements,the B(D0???-?+)and B(D+???0?+)are determined with improved precision,and consistent with the world-average values within uncertainties in 0.6? and 2.5a,respectively.We also search for the asymmetry of the branching fractions of the charged conjugate decays,no significant CP violation is found.Study of hadronic D meson decays and to measure the branching fractions,will be able to provide important experimental information for understanding D meson weak decay mechanism.In theory,the calculation of three-body decay is much more difficult than that of two-body decay.Study of these three-body de-cays can provide important experimental information for theoretical calculation.Meanwhile,most of the final states of B meson decay contain charm meson,which makes the decay of charm meson become an important background source in the experimental study of B physics.In addition,search for CP violation can provide valuable information for understanding the asymmetry of matter and antimatter in universe. |
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