论文标题
$π^+π^0 $ dihadrons的光束自旋不对称来自clas12
Beam Spin Asymmetries of $π^+π^0$ Dihadrons from SIDIS at CLAS12
论文作者
论文摘要
自旋不对称提供了对核子结构和强环化的广泛见解。 Recent measurements of beam spin asymmetries of $π^+π^-$ dihadrons from Semi-Inclusive Deep Inelastic Scattering (SIDIS) at CLAS12 provide the first empirical evidence of a nonzero $G_1^\perp$, the parton helicity-dependent Dihadron Fragmentation Function (DiFF) encoding spin-momentum correlations in hadronization.这些测量值已被扩展以帮助表征$ h_1^\ perp $和$ h_1^\ sphericalangle $，通过多维部分波分析，取决于parton横向旋转的差异，从而访问了对特定极极化的Dihadrons的依赖。 $π^0 $ s的重建允许将这些测量结果进一步扩展到$π^+π^0 $和$π^-π^0 $ dihadrons。描述$π^+π^ - $产量的差异与描述$π^+π^0 $和$π^-π^0 $产生的差异不同，该$涉及不同的夸克风味，以及对独家衍射贡献的强烈抑制。与来自$π^+π^0 $ dihadrons的束旋转不对称的介绍相比，与$π^+π^ - $ dihadrons相比，这将有助于揭示迪哈德隆碎片的更全面的情况。
Spin asymmetries provide a wide range of insights into nucleon structure and hadronization. Recent measurements of beam spin asymmetries of $π^+π^-$ dihadrons from Semi-Inclusive Deep Inelastic Scattering (SIDIS) at CLAS12 provide the first empirical evidence of a nonzero $G_1^\perp$, the parton helicity-dependent Dihadron Fragmentation Function (DiFF) encoding spin-momentum correlations in hadronization. These measurements have been extended to aid in the characterization of $H_1^\perp$ and $H_1^\sphericalangle$, the DiFFs dependent on parton transverse spin, via a multidimensional partial wave analysis, giving access to the dependence on the interference of dihadrons of particular polarizations. Reconstruction of $π^0$s allows for further extension of these measurements to $π^+π^0$ and $π^-π^0$ dihadrons. The DiFFs describing $π^+π^-$ production differ from those describing $π^+π^0$ and $π^-π^0$ production, which involve different quark flavors along with a strong suppression of the exclusive diffractive contribution. This presentation will focus on beam spin asymmetries for $π^+π^0$ dihadrons, compared to those from $π^+π^-$ dihadrons, which will help shed light on a more comprehensive picture of dihadron fragmentation.
