Based on a sample of 4.5 fb-1 of e+e- annihilation data collected in the energy region between 4.6 GeV and 4.7 GeV with the BESIII detector at BEPCII, two singly Cabibbo-suppressed decays Λc+→Sigma0K+ and Λc+→Sigma+KS0 are studied. The ratio of the branching fraction B(Λc+→Sigma0K+) relative to B(Λc+→Sigma0π+) is measured to be 0.0361±0.0073(stat.)±0.0005(syst.), and the ratio of B(Λc+→Sigma+KS0) relative to B(Λc+→Sigma+π+π-) is measured to be 0.0106±0.0031(stat.)±0.0004(syst.). After taking the world-average branching fractions of the reference decay channels, the branching fractions B(Λc+→Sigma0K+) and B(Λc+→Sigma+KS0) are determined to be (4.7±0.9(stat.)±0.1(syst.)±0.3(ref.))×10-4 and (4.8±1.4(stat.)±0.2(syst.)±0.3(ref.))×10-4, respectively. The branching fraction of the Λc+→Sigma+KS0 decay is measured for the first time
Measurement of branching fractions of singly Cabibbo-suppressed decays Λc+ → Σ0K+ and Σ+ KS0
I. Garzia;
2022
Abstract
Based on a sample of 4.5 fb-1 of e+e- annihilation data collected in the energy region between 4.6 GeV and 4.7 GeV with the BESIII detector at BEPCII, two singly Cabibbo-suppressed decays Λc+→Sigma0K+ and Λc+→Sigma+KS0 are studied. The ratio of the branching fraction B(Λc+→Sigma0K+) relative to B(Λc+→Sigma0π+) is measured to be 0.0361±0.0073(stat.)±0.0005(syst.), and the ratio of B(Λc+→Sigma+KS0) relative to B(Λc+→Sigma+π+π-) is measured to be 0.0106±0.0031(stat.)±0.0004(syst.). After taking the world-average branching fractions of the reference decay channels, the branching fractions B(Λc+→Sigma0K+) and B(Λc+→Sigma+KS0) are determined to be (4.7±0.9(stat.)±0.1(syst.)±0.3(ref.))×10-4 and (4.8±1.4(stat.)±0.2(syst.)±0.3(ref.))×10-4, respectively. The branching fraction of the Λc+→Sigma+KS0 decay is measured for the first timeFile | Dimensione | Formato | |
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PhysRevD.106.052003.pdf
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