Search for the weak decays J/ψDs()eνe+c.c.J/\psi \to D^{(*)}_{s}e\nu_{e}+c.c.

Collaboration
Oct 30, 2014

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Abstract: (APS)

Using a sample of 2.25×108 J/ψ events collected with the BESIII detector at the BEPCII collider, we search for the J/ψ semileptonic weak decay J/ψDse+νe+c.c. with a much higher sensitivity than previous searches. We also perform the first search for J/ψDs*e+νe+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 B(J/ψDse+νe+c.c.)<1.3×106 and B(J/ψDs*e+νe+c.c.)<1.8×106, respectively. Both are consistent with Standard Model predictions.

Note:
  • 9 pages, 4 figures
  • 14.40.Lb
  • 13.20.Gd
  • J/psi(3100): electroproduction
  • J/psi(3100): semileptonic decay
  • J/psi(3100): rare decay
  • D/s-: hadronic decay
  • D/s*(2110)-: radiative decay
  • sensitivity
  • branching ratio: upper limit
  • electron positron: annihilation