Measurement of the branching fractions of doubly Cabibbo-suppressed $D$ decays

Abstract

By analyzing $e^{+}{e}^{-}$ collision data collected at the center-of-mass energy of 3.773~GeV with the BESIII detector, corresponding to an integrated luminosity of 20.3~fb${}^{-1}$, we measure the branching fractions of the doubly Cabibbo-suppressed (DCS) decays $D^0\to K^{+}{\pi }^{-}$, $D^0\to K^{+}{\pi }^{-}{\pi }^{-}{\pi }^{+}$, $D^0\to K^{+}{\pi }^{-}{\pi }^0$, $D^0\to K^{+}{\pi }^{-}{\pi }^0{\pi }^0$, $D^{+}\to K^{+}{\pi }^{+}{\pi }^{-}$, and $D^{+}\to K^{+}{K}^{+}{K}^{-}$. We also perform the first searches for $D^0\to K^{+}{\pi }^{-}\eta$, $D^0\to K^{+}{\pi }^{-}{\pi }^0\eta$, $D^{+}\to K^{+}{\pi }^{+}{\pi }^{-}\eta$, $D^{+}\to K^{+}{\left({\pi }^{+}{\pi }^{-}\eta \right)}_{\mathrm{non}-{\eta }^{\prime }}$, and $D^{+}\to K^{+}\eta \eta$ and report the first observations and evidence for some of these final states. Combining the measurements with the world averages of the corresponding Cabibbo-favored (CF) decays, the ratios of the DCS/CF branching fractions are obtained. For the $D^{+}\to K^{+}{\left({\pi }^{+}{\pi }^{-}\eta \right)}_{\mathrm{non}-{\eta }^{\prime }}$ decay, the ratio is significantly larger than the corresponding ratios of the other DCS decays.

arXiv comment16 pages, 5 figures

References in corpus (12)

• Asymptotic formulae for likelihood-based tests of new physics
• A Unified Approach to the Classical Statistical Analysis of Small Signals
• The Precision Monte Carlo Event Generator KK For Two-Fermion Final States In e+e- Collisions
• Coherent Exclusive Exponentiation For Precision Monte Carlo Calculations
• Comment on the heavy-->light form factors
• STCF Conceptual Design Report: Volume 1 -- Physics & Detector
• Two-body hadronic charmed meson decays
• Study of the Standard Model with weak decays of charmed hadrons at BESIII
• Recent Progress in Leptonic and Semileptonic Decays of Charmed Hadrons
• Charm CPV: observation and prospects
• Puzzles in Hyperon, Charm and Beauty Physics
• Multiplicity distributions in e+e- annihilation into hadrons and pure birth branching processes