论文标题
提取横向动量依赖性偏振碎片功能
Extracting the Transverse Momentum Dependent Polarizing Fragmentation Functions
论文作者
论文摘要
我们证明，可以使用横向动量依赖性极化碎片函数（TMD PFF）来描述Lambda Baryon（$λ$）生产的Lambda Baryon（$λ$）生产的自发横向极化。使用简单的高斯模型，我们通过拟合Belle协作的最新测量来提取TMD PFF，以$ E^+E^ - $ collisions中的背对背$λ+H $生产中的$λ$横向极化，$ E^{ - e^{ - }+e^{ - }+e^{+e^{+e^{+erighorAwλ^eporlaw）+我们发现，这个简单的模型准确地描述了与Pions和Kaons相关的$λ$生产的实验数据，并且我们能够确定不同夸克口味的TMD PFF。我们使用这些新提取的TMD PFF来预测在将来的电子离子对撞机上在半包含的深度弹性散射中产生的$λ$的横向极化，并发现这种极化约为$ 10 \％$，应该可测量。
We demonstrate that spontaneous transverse polarization of Lambda baryon ($Λ$) production in $e^+e^-$ annihilation can be described using the transverse momentum dependent polarizing fragmentation functions (TMD PFFs). Using a simple Gaussian model, we perform an extraction of the TMD PFFs by fitting the BELLE collaboration's recent measurement of the $Λ$ transverse polarization in back-to-back $Λ+h$ production in $e^+ e^-$ collisions, $e^{-} + e^{+} \rightarrow Λ^{\uparrow}+h+X$. We find that this simple model accurately describes the experimental data for $Λ$ production associated with pions and kaons, and we are able to determine TMD PFFs for different quark flavors. We use these newly extracted TMD PFFs to make predictions for the transverse polarization of $Λ$ produced in semi-inclusive deep inelastic scattering at a future electron-ion collider, and find that such a polarization is around $10\%$ and should be measurable.
