Measurement of the absolute branching fraction for Λc +→Λμ+νμ

BESIII Collaboration

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26 Citations (Scopus)

Abstract

We report the first measurement of the absolute branching fraction for Λc +→Λμ+νμ. This measurement is based on a sample of e+e annihilation data produced at a center-of-mass energy s=4.6 GeV, collected with the BESIII detector at the BEPCII storage rings. The sample corresponds to an integrated luminosity of 567 pb−1. The branching fraction is determined to be B(Λc +→Λμ+νμ)=(3.49±0.46(stat)±0.27(syst))%. In addition, we calculate the ratio B(Λc +→Λμ+νμ)/B(Λc +→Λe+νe) to be 0.96±0.16(stat)±0.04(syst).

Original languageEnglish
Pages (from-to)42-47
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume767
DOIs
Publication statusPublished - 10 Apr 2017

Keywords

  • Absolute branching fraction
  • BESIII
  • Semi-leptonic decay
  • Λ
  • CHARMED BARYONS
  • RATES
  • HEAVY-QUARK
  • PREDICTIONS
  • MODEL
  • SEMILEPTONIC DECAYS
  • QCD SUM-RULES
  • Lambda(+)(c)

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