000002806 001__ 2806
000002806 005__ 20220905085706.0
000002806 037__ $$aBELLE2-UTHESIS-2021-001
000002806 041__ $$akor
000002806 100__ $$aHaeyun Hwang
000002806 245__ $$aMC study to obtain reconstruction efficiencies to measure branching fraction of D+ -> K+ pi0 mode
000002806 260__ $$aSeoul$$bSoongsil University$$c2021
000002806 300__ $$amult. p
000002806 500__ $$aPresented on 13 12 2021
000002806 502__ $$aBSc$$bSeoul, Soongsil University$$c2021
000002806 520__ $$aMeasuring the branching fraction of the D meson rare decay is important for validating the theoretical calculations of the standard model. The goal of this thesis is to obtain reconstruction efficiencies that required to measuring the branching fraction of D+ → K+ pi0 mode. The modes are D+ → K+ pi0 as a signal mode, D+ → K- pi0 pi0 as a reference mode, and its charge conjugated modes. In this thesis, we reconstructed Signal MC data samples which contain beam background(BGX1) and we figured out the optimized selection criteria for the samples. As a result, the reconstruction efficiencies we obtained are 7.35% ± 0.1232% for D+ → K+ pi0 mode, 7.05% ± 0.1161% for D- → K- pi0 mode, 11.686% ± 0.0439% for D+ → K- pi+ pi+ mode and 11.838% ± 0.0444% for D- → K+ pi- pi- mode. Limitation of the study is that the data samples we used contain only beam background. Therefore, it is necessary to find more appropriate selection criteria and reconstruction efficiency.
000002806 700__ $$aDoris Kim$$edir.
000002806 8560_ $$fnuri9812@naver.com
000002806 8564_ $$uhttps://docs.belle2.org/record/2806/files/BELLE2-UTHESIS-2021-001.pdf
000002806 980__ $$aTHESIS