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arXiv 1111.2495hep-ph
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强子碰撞喷注中π介子的方位角分布

Azimuthal distributions of pions inside a jet in hadronic collisions

Umberto D'Alesio, Francesco Murgia, Cristian Pisano

摘要:

利用包含自旋和内禀部分子运动效应的广义部分子模型方法,并假设强子碰撞中大pT喷注产生的因子分解的有效性,我们研究了喷注碎裂过程中产生的主要部分子在喷注轴周围的方位角分布.我们确定了可观察到的领先扭转方位角不对称性,这是由所有的物理允许的横向动量相关(TMD)部分子分布和碎裂功能的组合。特别是,我们展示了如何可以隔离柯林斯和西弗斯的贡献,并建议测试的过程依赖性的西弗斯功能考虑色规不变的初始和最终状态的相互作用的影响。

英文摘要:

Using a generalized parton model approach including spin and intrinsic parton motion effects, and assuming the validity of factorization for large pT jet production in hadronic collisions, we study the azimuthal distribution around the jet axis of leading pions, produced in the jet fragmentation process. We identify the observable leading-twist azimuthal asymmetries, which are generated by all the physically allowed combinations of transverse momentum dependent (TMD) parton distribution and fragmentation functions. In particular, we show how one can isolate the Collins and Sivers contributions, and suggest a test of the process dependence of the Sivers function by considering the effect of color-gauge invariant initial and final state interactions.

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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