TY - JOUR

T1 - Partial wave analysis of the charmed baryon hadronic decay Λc+ → Λπ + π 0

AU - Ачасов, Михаил Николаевич

AU - Мучной, Николай Юрьевич

AU - Николаев, Иван Борисович

N1 - Публикация для проверки.

PY - 2022/12/6

Y1 - 2022/12/6

N2 - Based on e+e− collision samples corresponding to an integrated luminosity of 4.4 fb−1 collected with the BESIII detector at center-of-mass energies between 4.6 GeV and 4.7 GeV, a partial wave analysis of the charmed baryon hadronic decay Λ+c → Λπ+π0 is performed, and the decays Λ+c → Λρ(770)+ and Λ+c → Σ(1385)π are studied for the first time. Making use of the world-average branching fraction B(Λ+c→Λπ+π0), their branching fractions are determined to be B(Λ+c→Λρ(770)+)=(4.06±0.30±0.35±0.23)×10−2,B(Λ+c→Σ(1385)+π0)=(5.86±0.49±0.52±0.35)×10−3,B(Λ+c→Σ(1385)0π+)=(6.47±0.59±0.66±0.38)×10−3, where the first uncertainties are statistical, the second are systematic, and the third are from the uncertainties of the branching fractions B(Λ+c→Λπ+π0) and B(Σ(1385)→Λπ). In addition, the decay asymmetry parameters are measured to be αΛρ(770)+ =  − 0.763 ± 0.053 ± 0.045, αΣ(1385)+π0=−0.917±0.069±0.056, and αΣ(1385)0π+=−0.789±0.098±0.056.

AB - Based on e+e− collision samples corresponding to an integrated luminosity of 4.4 fb−1 collected with the BESIII detector at center-of-mass energies between 4.6 GeV and 4.7 GeV, a partial wave analysis of the charmed baryon hadronic decay Λ+c → Λπ+π0 is performed, and the decays Λ+c → Λρ(770)+ and Λ+c → Σ(1385)π are studied for the first time. Making use of the world-average branching fraction B(Λ+c→Λπ+π0), their branching fractions are determined to be B(Λ+c→Λρ(770)+)=(4.06±0.30±0.35±0.23)×10−2,B(Λ+c→Σ(1385)+π0)=(5.86±0.49±0.52±0.35)×10−3,B(Λ+c→Σ(1385)0π+)=(6.47±0.59±0.66±0.38)×10−3, where the first uncertainties are statistical, the second are systematic, and the third are from the uncertainties of the branching fractions B(Λ+c→Λπ+π0) and B(Σ(1385)→Λπ). In addition, the decay asymmetry parameters are measured to be αΛρ(770)+ =  − 0.763 ± 0.053 ± 0.045, αΣ(1385)+π0=−0.917±0.069±0.056, and αΣ(1385)0π+=−0.789±0.098±0.056.

U2 - 10.1007/JHEP12(2022)033

DO - 10.1007/JHEP12(2022)033

M3 - Article

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

SN - 1029-8479

M1 - 33

ER -