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

Adam Lutoborski

Abstract

We study the charmed baryons spectroscopy of Λ_b^0 semileptonic decays: Λ_b^0 -> Λ_c^*+ μ^- ν_μ, and the most interesting is Λ_b^0 -> Λ_c^+(2765) μ^- ν_μ , using Run2 data set, years 2016, 2017 and 2018, with a total integrated luminosity is nearly 6.0 fb-1 collected by the LHCb experiment. We also study the Σc(∗)++/0 components in the Λ_c^+(2765) resonance to gain a better understanding of the state and estimate its spin-parity. We present the preliminary results for the predicted Spin-Parity of Λ_c^+(2765) as J^P (nL) = 1/2^+ (2S), the measured mass is M (Λ_c^+(2765)) = 2772.13 ± 0.87 ± 0.19 [MeV/c^2 ] and the decay width is Γ(Λ_c^+(2765)) = 62.13^{+3.51}_{−3.28} ± 7.5[MeV/c^2 ]. The branching ratio of the inclusive decays Λ_c^+(2765) -> Λ_c^+ π^+ π^- and Λ_c^+(2880) -> Λ_c^+ π^+ π^- has been estimated as: R = B(Λ_b^0 ->Λ_c^+(2765) (-> Λ_c^+ π^+ π^- )μ^- ν_μ) / B(Λ_b^0 ->Λ_c^+(2880) (-> Λ_c^+ π^+ π^-)μ^- ν_μ ) = 2.66 ± 0.16 ± 0.4.

Access

Open Access

Download

Share

COinS