Updated numerical study of transverse single-spin asymmetries in single-inclusive pion production from lepton-nucleon collisions
Updated numerical study of transverse single-spin asymmetries in single-inclusive pion production from lepton-nucleon collisions
复制标题
轻子-核子碰撞产生单包π介子中横向单自旋不对称性的最新数值研究
DOI：
10.1016/j.physletb.2024.138606
复制
发表时间：
2024
影响因子：
4.4
通讯作者：
Smith, Penn
中科院分区：
文献类型：
--
作者：
Fitzgibbons, Sophia;Malda, Michel;Marsh, Jacob;Pitonyak, Daniel;Smith, Penn
我们重新审视轻子-核子散射中横向单自旋不对称性 A N 的分析，其中在最终状态 ℓ N↑→ h X 中仅检测到单个π介子。这个可观察到的现象是电子-离子对撞机 (EIC) 与质子-质子碰撞中 A N 的类似物，p↑ p→ h X，这已经被深入研究了几十年，特别是在相对论重离子对撞机 (RHIC) 中。我们将新的理论发展融入共线twist-3框架中，并在数值计算中利用最近提取的（Sivers-like和Collins-like）夸克-胶子-夸克相关器。我们将计算结果与 HERMES 测量结果进行比较，并对 Jefferson Lab、COMPASS 和 EIC 运动学进行预测。我们进一步探讨了次前导阶 (NLO) 校正对 (twist-2) 非极化截面（A N 的分母）的作用，并考虑在此过程中可以凭经验推断出 A N 的完整 NLO 计算的潜在数值意义。我们在预测中考虑了理论不确定性的来源，这为未来的测量提供了潜在的机会，以提高我们对 A N 和强子中多子相关性的理解。
We revisit the analysis of transverse single-spin asymmetries A N in lepton-nucleon scattering where only a single pion is detected in the final state, ℓ N↑→ h X. This observable is the Electron-Ion Collider (EIC) analogue to A N in proton-proton collisions, p↑ p→ h X, that has been studied intensely for decades, especially at the Relativistic Heavy Ion Collider (RHIC). We incorporate new theoretical developments in the collinear twist-3 framework and utilize recent extractions of (Sivers-like and Collins-like) quark-gluon-quark correlators in the numerical computations. We compare our calculations to HERMES measurements as well as make predictions for Jefferson Lab, COMPASS, and EIC kinematics. We further explore the role of next-to-leading order (NLO) corrections to the (twist-2) unpolarized cross section (denominator of A N) and consider what can be deduced empirically about the potential numerical significance of the full NLO calculation of A N in this process. We consider sources of theoretical uncertainty in our predictions, which present potential opportunities then for future measurements to improve our understanding of A N and multi-parton correlations in hadrons.
DOI：
10.1016/j.nuclphysb.2006.11.016
发表时间：
2006-10
期刊：
Nuclear Physics
影响因子：
--
作者：
H. Eguchi;Y. Koike;Kazuhiro Tanaka
通讯作者：
H. Eguchi;Y. Koike;Kazuhiro Tanaka
单自旋不对称性的预测
DOI：
--
发表时间：
1999
期刊：
影响因子：
--
作者：
M. Anselmino;M. Boglione;J. Hansson;F. M. University;Infn;Torino;Italy.;Vrije Universiteit;Amsterdam;The Netherlands.;Lulea University of Technology;Lulea;Sweden.;University;Cagliari
通讯作者：
Cagliari
影响因子：
4.4
作者：
A. Bacchetta;F. Delcarro;C. Pisano;M. Radici
通讯作者：
M. Radici