Measurement of |vcb| Using the Semileptonic Decay Λb → Λcμνμ

<p>A preliminary measurement of the quark-mixing parameter |Vcb| using the exclusive decay Λ0b→ Λ+c μ−νμ is presented. A sample of Λb semileptonic decays is provided by √s = 13TeV proton-proton collisions collected by the LHCb detector in 2017. Λ0b → Λ+c μ−νμX decays are identified from muon tracks, combined with a Λc baryon. The ground state Λ0b → Λ+c μ−νμ is isolated by a fit to the Λb corrected mass spectrum. The raw yield NRaw(Λ0b → Λ+c μ−νμ) is corrected, and the semileptonic width ΓMeas. (Λ0b → Λ+c μ−νμ) is obtained. Lattice QCD calculations predict ΓTh.(Λ0b → Λ+c μ−νμ)/|Vcb|2. A comparison between the measured and predicted widths gives |Vcb| from the relative normalization. This method also provides a measurement of the branching fraction B(Λ0b → Λ+c μ−νμ) using well-measured properties of B-meson decays.</p>

Name thesis:degree_name

Doctor of Philosophy (PhD)

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Physics

Year

2022

Author dc:creator

• Ely, Scott Edward

Contributors dc:contributor

• Artuso, Marina

• CERN
• CP Violation
• Lambda_c Baryon
• LHCb
• Vcb
• Physical Sciences and Mathematics
• Physics

Repository record dc:identifier

https://surface.syr.edu/etd/1552

OAI identifier oai:identifier

oai:surface.syr.edu:etd-2553