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arXiv 0808.1004hep-phhep-ex
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半包容深度非弹性散射过程中的左右不对称性

Left-right asymmetry in semi-inclusive deep inelastic scattering process

Jun She, Yajun Mao, Bo-Qiang Ma

摘要:

分析了非极化带电轻子与横向极化核子靶的半包容深度非弹性散射(SIDIS)过程中π介子产生的左右不对称性。与现有的处理方法不同,在现有的处理方法中,一些特定的加权函数相乘以分离理论上激发的量,我们不引入任何加权函数,遵循E704实验的分析方法。其优点是,这个基本的可观测量是免费的任何理论偏差,虽然我们可以在当前的理论框架下进行计算。我们目前在两个HERMES运动学质子靶和JLab运动学中子靶的数值计算。我们发现,与目前的理论认识,西弗斯效应起着关键作用,在我们的分析。

英文摘要:

We analyze the left-right asymmetry of pion production in semi-inclusive deep inelastic scattering (SIDIS) process of unpolarized charged lepton on transversely polarized nucleon target. Unlike available treatments, in which some specific weighting functions are multiplied to separate theoretically motivated quantities, we do not introduce any weighting function following the analyzing method by the E704 experiment. The advantage is that this basic observable is free of any theoretical bias, although we can perform the calculation under the current theoretical framework. We present numerical calculations at both HERMES kinematics for the proton target and JLab kinematics for the neutron target. We find that with the current theoretical understanding, Sivers effect plays a key role in our analysis.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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