D^0 → K_{S}^{0}ω 和 D^0 → K_{L}^{0}ω 衰变中的 K_{S}^{0}-K_{L}^{0} 不对称性研究
Study of $K_{S}^{0}$-$K_{L}^{0}$ asymmetry in the decays $D^0 \to K_{S}^{0}ω$ and $D^0 \to K_{L}^{0} ω$
AI总结：
BESIII实验利用BEPCII的e⁺e⁻数据测量D⁰→K_{S}^{0}ω和D⁰→K_{L}^{0}ω的分支分数及K_{S}^{0}-K_{L}^{0}不对称性，为相关物理研究提供关键参数。
AI中文摘要：
基于在BEPCII对撞机上用BESIII探测器采集的、对应积分亮度为7.93 fb⁻¹的质心系能量3.773 GeV的e⁺e⁻湮灭数据，测量得到D⁰→K_{S}^{0}ω和D⁰→K_{L}^{0}ω衰变的绝对分支分数分别为(11.79±0.19±0.26±0.47)×10⁻³和(10.84±0.14±0.23±0.44)×10⁻³。这两种衰变的K_{S}^{0}-K_{L}^{0}分支分数不对称性R(D⁰,K_{S,L}^{0}ω) = [B(D⁰→K_{S}^{0}ω)-B(D⁰→K_{L}^{0}ω)]/[B(D⁰→K_{S}^{0}ω)+B(D⁰→K_{L}^{0}ω)] = (4.2±1.0±0.9±2.8)%。其中，第一类不确定度为统计不确定度，第二类为系统不确定度，第三类不确定度源于D⁰→K_{S,L}^{0}ω与非共振过程D⁰→π⁺π⁻π⁰K_{S,L}^{0}之间的干涉。
英文摘要：
Based on $e^+ e^-$ annihilation data corresponding to an integrated luminosity of 7.93~$fb^{-1}$ collected at a center-of-mass energy of 3.773 GeV with the BESIII detector at the BEPCII collider, the absolute branching fractions of the decays $D^0 \to K_{S}^{0} ω$ and $D^0 \to K_{L}^{0} ω$ are measured to be $(11.79 \pm 0.19 \pm 0.26 \pm 0.47) \times 10^{-3}$ and ($10.84 \pm 0.14 \pm 0.23 \pm 0.44) \times 10^{-3}$, respectively. The $K_{S}^{0}- K_{L}^{0}$ branching-fraction asymmetry of these two decays is $R(D^0,K_{S,L}^{0} ω) = \frac{\mathcal{B}(D^0 \to K_{S}^{0} ω) - \mathcal{B}(D^0 \to K_{L}^{0}ω)}{\mathcal{B}(D^0 \to K_{S}^{0} ω) + \mathcal{B}(D^0 \to K_{L}^{0} ω)} =(4.2 \pm 1.0 \pm 0.9 \pm 2.8)\%$. Here, the first uncertainties are statistical, the second systematic, and the third arise from the interference between $D^0 \to K_{S,L}^{0} ω$ and the non-resonant $D^0 \to π^+ π^- π^0 K_{S,L}^{0}$ processes.
