000003259 001__ 3259
000003259 005__ 20220929120524.0
000003259 037__ $$aBELLE2-MTHESIS-2022-038
000003259 041__ $$aeng
000003259 100__ $$aAman Pavan Salikar
000003259 245__ $$aStudy of resonant B0 -> Xd/s l+l- branching ratios
000003259 260__ $$aMunich, Germany$$bLudwig-Maximilians-University$$c2022
000003259 300__ $$a47
000003259 500__ $$aPresented on 29 09 2022
000003259 502__ $$aMSc$$bMunich, Germany, Ludwig-Maximilians-University$$c2022
000003259 520__ $$aThe thesis focuses on resonant processes of B → Xℓℓ decay using 1 ab^−1 Monte-Carlo simulated data at Belle II. The channels being analysed are B0 → K0s J/ψ,B0 → K0s ψ(2S),B0 →π0 J/ψ,B0 → π0 ψ(2S),B0 → K∗(K+π−)γ∗,B0 → ρ0 γ∗. At the loop level, the cross section of the decay modes of B0 → Xd/s ℓ+ℓ− is dependant on the matrix elements Vcd and Vcs. So this analysis concentrates on the ratio Xs to Xd which is essentially the ratio of the above two elements. This was found out to be 24.12290 ± 0.595297 for J/ψ resonance state and 23.90814 ± 2.87876 for the ψ(2S) resonance state.
000003259 700__ $$aProf. Dr. Thomas Kuhr$$edir.
000003259 8560_ $$faman.salikar@physik.uni-muenchen.de
000003259 8564_ $$uhttps://docs.belle2.org/record/3259/files/BELLE2-MTHESIS-2022-038.pdf
000003259 980__ $$aTHESIS