Measurements of absolute branching fractions for Λc +→Ξ0K+ and Ξ(1530)0K+

BESIII Collaboration

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We report the first measurements of absolute branching fractions for the W-exchange-only processes Λc +→Ξ0K+ and Λc +→Ξ(1530)0K+ with the double-tag technique, by analyzing an e+e collision data sample, that corresponds to an integrated luminosity of 567 pb−1 collected at a center-of-mass energy of 4.6 GeV by the BESIII detector. The branching fractions are measured to be B(Λc +→Ξ0K+)=(5.90±0.86±0.39)×10−3 and B(Λc +→Ξ(1530)0K+)=(5.02±0.99±0.31)×10−3, where the first uncertainties are statistical and the second systematic. Our results are more precise than the previous relative measurements.

Original languageEnglish (US)
Pages (from-to)200-206
Number of pages7
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
StatePublished - Aug 10 2018

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  • Absolute branching fraction
  • W-exchange
  • Λ


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