First search for the weak radiative decays Λc+Σ+γ and Ξc0Ξ0γ

Collaboration
Jun 24, 2022
10 pages
Published in:
  • Phys.Rev.D 107 (2023) 3, 032001
  • Published: Feb 1, 2023
e-Print:
DOI:
Report number:
  • Belle Preprint 2022-12; KEK Preprint 2022-11
Experiments:

Citations per year

20222023202442
Abstract: (APS)
We present the first search for the weak radiative decays Λc+Σ+γ and Ξc0Ξ0γ using a data sample of 980fb-1 collected by the Belle detector operating at the KEKB asymmetric-energy e+e- collider. There are no evident Λc+Σ+γ or Ξc0Ξ0γ signals. Taking the decays Λc+pK-π+ and Ξc0Ξ-π+ as normalization channels, the upper limits at 90% credibility level on the ratios of branching fractions B(Λc+Σ+γ)/B(Λc+pK-π+)<4.0×10-3 and B(Ξc0Ξ0γ)/B(Ξc0Ξ-π+)<1.2×10-2 are determined. We obtain the upper limits at 90% credibility level on the absolute branching fractions B(Λc+Σ+γ)<2.6×10-4 and B(Ξc0Ξ0γ)<1.8×10-4.
Note:
  • 10 pages, 6 pages; accepted for publication as a Regular Article in Physical Review D
  • electron positron: annihilation
  • electron positron: colliding beams
  • branching ratio: ratio: upper limit
  • Lambda/c+: radiative decay
  • Xi/c: radiative decay
  • Lambda/c+: branching ratio: upper limit
  • Xi/c: branching ratio
  • branching ratio: upper limit
  • BELLE
  • KEK-B