Observation and branching fraction measurement of the decay J /ψ →p ¯Σ+KS0+c .c .
Abstract
The first observation of the decays J /ψ →p ¯ Σ+KS0 and J /ψ →p Σ¯ -KS0 is reported using (10087 ±44 )×106 J /ψ events recorded by the BESIII detector at the BEPCII storage ring. The branching fractions of each channel are determined to be B (J /ψ →p ¯ Σ+KS0 )=(1.361 ±0.006 ±0.025 ) ×10-4 , and B (J /ψ →p Σ¯-KS0 )=(1.352 ±0.006 ±0.025 ) ×10-4 . The combined result is B (J /ψ →p ¯ Σ+KS0 +c .c .)=(2.725 ±0.009 ±0.050 ) ×10-4 , where the first uncertainty is statistical and the second systematic. The results presented are in good agreement with the branching fractions of the isospin partner decay J /ψ →p K-Σ¯ 0+c .c .
- Publication:
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Physical Review D
- Pub Date:
- January 2024
- DOI:
- 10.1103/PhysRevD.109.012006
- arXiv:
- arXiv:2311.05955
- Bibcode:
- 2024PhRvD.109a2006A
- Keywords:
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- High Energy Physics - Experiment