Measurement of longitudinal-target-polarization dependent azimuthal asymmetries in SIDIS at COMPASS experiment
Measurement of longitudinal-target-polarization dependent azimuthal asymmetries in SIDIS at COMPASS experiment
复制标题
COMPASS 实验中 SIDIS 中纵向目标偏振相关方位不对称性的测量
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
B. Parsamyan
中科院分区：
文献类型：
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作者：
B. Parsamyan
本文首次给出了COMPASS实验对单强子离质子产生中与自旋相关的方位角不对称性的初步结果。利用2007年和2011年的COMPASS纵向极化质子（$NH_3$）靶实验数据，分别对160~gvc和200~gvc μ子束进行了分析。在QCD部分子模型方法中，提取的不对称性使我们能够获得某些依赖于横向动量的特定卷积。 extit{twist-2}和 extit{higher twist}部分子分布函数和碎裂函数。为了访问不同的功能，所涉及的分布，不对称性提取的不同的运动学变量的函数为正和负的单强子生产。大量收集的数据和广泛的运动学范围赋予了结果独特的重要性。获得的不对称性进行比较与以前的测量进行爱马仕实验和可用的模型预测。
Preliminary results obtained by the COMPASS experiment for longitudinal-spin-dependent azimuthal asymmetries in single-hadron muoproduction off protons are presented for the first time. The analysis was carried out on the full data sample collected by COMPASS with longitudinally polarized proton ($NH_3$) target in 2007 and 2011 using 160~gvc and 200~gvc muon beams, correspondingly. Within QCD parton model approach extracted asymmetries are giving access to the specific convolutions of certain transverse-momentum-dependent extit{twist-2} and extit{higher twist} parton distribution functions and fragmentation functions. In order to access different features of the involved distributions, the asymmetries are extracted as functions of different kinematic variables for both positive and negative single-hadron productions. The significant amount of collected data and wide kinematic range give unique importance to the results. Obtained asymmetries are compared with previous measurements performed by HERMES experiment and with available model predictions.
使用纵向极化靶测量深部非弹性π介子电生产中的单自旋和双自旋不对称性。
影响因子：
8.6
作者：
Avakian H
通讯作者：
Avakian H