Remarks on measurement of the decay Ξ_b^- → Λ_b π^-

2015/10/19 by M. B. Voloshin, Voloshin, M. B., M.B. Voloshin
Physics and Astronomy · #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #Black Holes and Theoretical Physics

paper · pdf · doi:10.48550/arxiv.1510.05568

Abstract

The interpretation of the recent observation by LHCb of a heavy-flavor-conserving and strangeness-changing decay Ξ_b^- → Λ_b π^- in terms of the branching fraction for the decay suffers from the uncertainty in the yield of the Ξ_b^- hyperons relative to that of the Λ_b. It is pointed out here that this relative yield can be determined with a significantly reduced uncertainty by measuring within the same experimental conditions the decays related by the flavor SU(3) symmetry and/or the heavy quark symmetry, such as Ξ_b → J/ψ Ξ, Λ_b → J/ψ Λ, or Ξ_b^- → Ξ_c⁰ ℓ ν, Λ_b → Λ_c ℓ ν.

Related

• Observation of the Λ_b⁰ → J/ψΞ^- K⁺ and Ξ_b⁰ → J/ψΞ^- π⁺ decays
• Measurement of the branching fraction of the Λ_b⁰→ J/ψΛ decay and isospin asymmetry of B→ J/ψK decays
• The Λ_b→ J/ψ+Λ Decay Revisited
• Masses and decay widths of Ξ_c/b and Ξ^′_c/b baryons
• Testing Fundamental Symmetries with Λ_b → Λ-Vector Decay