The branching fraction of D+→KS0π0e+νe is measured for the first time using 7.93 fb−1 of e+e− annihilation data collected at the center-of-mass energy s = 3.773 GeV with the BESIII detector operating at the BEPCII collider, and is determined to be B(D+→KS0π0e+νe)=(0.881±0.017stat.±0.016syst.)%. Based on an analysis of the D+→KS0π0e+νe decay dynamics, we observe the S-wave and P-wave components with fractions of f_{S-wave} = (6.13 ± 0.27stat.± 0.30syst.)% and f_{Kbar*(892)^0}=(93.88±0.27stat.±0.29syst.)%, respectively. From these results, we obtain the branching fractions B(D+→(KS0π0)_{S−wave}e+νe)=(5.41±0.35stat.±0.37syst.)×10−4 and B(D+→K¯∗(892)^0e+νe)=(4.97±0.11stat.±0.12syst.)%. In addition, the hadronic form-factor ratios of D+→K¯∗(892)^0e+νe at q2 = 0, assuming a single-pole dominance parameterization, are determined to be r_V=V(0)/A_1(0)=1.43±0.07stat.±0.03syst. and r_2=A_2(0)/A_1(0)=0.72±0.06stat.±0.02syst..
Analysis of the dynamics of the decay $$ {D}^{+}\to {K}_S^0{\pi}^0{e}^{+}{\nu}_e $$
Amoroso, A.;Bianchi, F.;Bianco, E.;Bortone, A.;Destefanis, M.;De Mori, F.;Garbolino, S.;Greco, M.;Lavezzi, L.;Maggiora, M.;Marcello, S.;Rivetti, A.;Sosio, S.;Spataro, S.;
2024-01-01
Abstract
The branching fraction of D+→KS0π0e+νe is measured for the first time using 7.93 fb−1 of e+e− annihilation data collected at the center-of-mass energy s = 3.773 GeV with the BESIII detector operating at the BEPCII collider, and is determined to be B(D+→KS0π0e+νe)=(0.881±0.017stat.±0.016syst.)%. Based on an analysis of the D+→KS0π0e+νe decay dynamics, we observe the S-wave and P-wave components with fractions of f_{S-wave} = (6.13 ± 0.27stat.± 0.30syst.)% and f_{Kbar*(892)^0}=(93.88±0.27stat.±0.29syst.)%, respectively. From these results, we obtain the branching fractions B(D+→(KS0π0)_{S−wave}e+νe)=(5.41±0.35stat.±0.37syst.)×10−4 and B(D+→K¯∗(892)^0e+νe)=(4.97±0.11stat.±0.12syst.)%. In addition, the hadronic form-factor ratios of D+→K¯∗(892)^0e+νe at q2 = 0, assuming a single-pole dominance parameterization, are determined to be r_V=V(0)/A_1(0)=1.43±0.07stat.±0.03syst. and r_2=A_2(0)/A_1(0)=0.72±0.06stat.±0.02syst..File | Dimensione | Formato | |
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