Search for the weak decays $J/\psi \to D_s^{(\ast )}e{\nu }_e$

Abstract

Using a sample of $2.25\times 10^8$ $J/\psi$ events collected with the BESIII detector at the BEPCII collider, we search for the $J/\psi$ semi-leptonic weak decay $J/\psi \to D_s^{-}{e}^{+}{\nu }_e+c.c.$ with a much higher sensitivity than previous searches. We also perform the first search for $J/\psi \to D_s^{\ast -}{e}^{+}{\nu }_e+c.c.$ No significant excess of a signal above background is observed in either channel. At the $90\%$ confidence level, the upper limits are determined to be $\mathcal{B}(J/\psi \to D_s^{-}{e}^{+}{\nu }_e+c.c.)<1.3\times 10^{-6}$ and $\mathcal{B}(J/\psi \to {D_s^{\ast }}^{-}{e}^{+}{\nu }_e+c.c.)<1.8\times 10^{-6}$, respectively. Both are consistent with Standard Model predictions.

9 pages, 4 figures

References in corpus (16)

• Big-Bang Nucleosynthesis
• Design and Construction of the BESIII Detector
• The Precision Monte Carlo Event Generator KK For Two-Fermion Final States In e+e- Collisions
• Coherent Exclusive Exponentiation For Precision Monte Carlo Calculations
• Topcolor Assisted Technicolor
• Kernel Estimation in High-Energy Physics
• Search for hadronic transition ${\chi }_{cJ}\to {\eta }_c{\pi }^{+}{\pi }^{-}$ and observation of ${\chi }_{cJ}\to K\bar{K}\pi \pi \pi$
• Branching fraction measurements of χ_{c0} and χ_{c2} to π^0π^0 and ηη
• Study of ${\chi }_{cJ}$ radiative decays into a vector meson
• The beam energy measurement system for the Beijing electron-positron collider
• The transition form factors for semi-leptonic weak decays of $J/\psi$ in QCD sum rules
• Observation of $e^{+}{e}^{-}\to \eta J/\psi$ at center-of-mass energy $sqrts=4.009$ GeV
• Trigger efficiencies at BES III
• Flavor Changing processes in Quarkonium Decays
• Measurement of ${\eta }^{\prime }\to {\pi }^{+}{\pi }^{-}{e}^{+}{e}^{-}$ and ${\eta }^{\prime }\to {\pi }^{+}{\pi }^{-}{\mu }^{+}{\mu }^{-}$
• Search for the Rare Decays J/Psi --> Ds- e+ nu_e, J/Psi --> D- e+ nu_e, and J/Psi --> D0bar e+ e-

Cited by in corpus (7)

• Exclusive decays $J/\psi \to D_{(s)}^{(\ast )-}{\ell }^{+}{\nu }_{\ell }$ in a covariant constituent quark model with infrared confinement
• Weak Decays of $J/\psi$ and ${\rm Y}(1S)$
• First lattice QCD calculation of $J/\psi$ semileptonic decay containing $D$ and $D_s$ particles
• Search for the weak decay $\psi (3686)\to {\Lambda }_c^{+}{\bar{\Sigma }}^{-}+c.c$
• Study of $C$ parity violating and strangeness changing $J/\psi$ $\to$ $PP$ weak decays
• Exclusive semileptonic and nonleptonic $J/\psi$ decays
• Combining upper limits with a Bayesian approach