Date of Award
6-26-2026
Date Published
July 2026
Degree Type
Dissertation
Degree Name
Doctor of Philosophy (PhD)
Department
Physics
Advisor(s)
Marina Artuso
Second Advisor
Leonid Kovalev
Abstract
A measurement of the CKM matrix element |Vcb| is performed using the decay Λ⁰_b → Λ⁺_c μ⁻ ν̅_μ. This analysis is based on the data sample collected in the year 2016-2018 with the LHCb detector at the LHC proton-proton collider at CERN. The yield for the exclusive final state considered is extracted from a sample of inclusive semileptonic decays Λ⁰_b → Λ⁺_c μ⁻ ν̅_μ X, where X represents the hadrons produced in Λ⁺*_c decays. The normalization mode is the inclusive semileptonic decay Λ⁰_b → X⁺_c μ⁻ ν̅_μ. The value of |Vcb| is then determined by comparing the measured differential decay rate dΓ/dq2 with theoretical predictions based on lattice QCD calculations. |Vcb| is found to be |Vcb|= (39.40 ± 0.29 ± 0.13) × 10−3. In addition, we measure the branching fraction B(Λ⁰_b → Λ⁺_c μ⁻ ν̅_μ) = (5.20 ± 0.10 ± 0.05)%. (results are preliminary)
Access
Open Access
Recommended Citation
Liang, Xixin, "|Vcb| measurement from decay Λ⁰_b → Λ⁺_c μ⁻ ν̅_μ" (2026). Dissertations - ALL. 2322.
https://surface.syr.edu/etd/2322
