Search for baryon and lepton number violation in J/ψ → Λc+e- + c.c.

• Using 1.31 x 109 J/ψ events collected by the BESIII detector at the Beijing Electron Positron Collider, we search for the process J/ψ → Λc+e- + c.c. for the first time. In this process, both baryon and lepton number conservation is violated. No signal is found and the upper limit on the branching fraction Β(J/ψ → Λc+e- + c.c.) is set to be 6.9 x 10-8 at the 90% confidence level.

Subject headings

NATURVETENSKAP  -- Fysik -- Subatomär fysik (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Subatomic Physics (hsv//eng)

Publication and Content Type

ref (subject category)

art (subject category)