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arXiv 2305.04005hep-ph
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高能电子-质子碰撞中伴随γ+jet产生的TMD部分子簇射

TMD parton showers for associated $γ$+jet production in electron-proton collisions at high energies

A. V. Lipatov, M. A. Malyshev

AI总结:

本文将k_T因子化框架扩展至电子-质子深度非弹性散射,基于PEGASUS和CASCADE事件产生器联合使用TMD部分子簇射算法模拟伴随γ+jet产生,良好描述了HERA低Q^2数据。

摘要:

先前开发的用于计算高能下伴随即时光子和强子喷流产生截面的k_T因子化框架,现已扩展至电子-质子深度非弹性散射。所提方法基于PEGASUS和CASCADE蒙特卡洛事件产生器的联合使用,它们处理质子中依赖于横向动量(TMD)的胶子和夸克密度。其中PEGASUS用于产生离壳光子-胶子融合事件。随后,为正确模拟所产生的喷流运动学,使用了CASCADE中实现的TMD部分子簇射算法。我们通过考虑HERA收集的低Q^2下即时光子加喷流产生的最新H1和ZEUS数据,展示了该方法的基本特征。我们实现了对测量数据的良好描述,并指出在基于TMD的方法中,正确模拟部分子簇射对于研究高能非包容性过程至关重要。

英文摘要:

An earlier developed $k_T$-factorization framework to calculate the associated prompt photon and hadronic jets production cross sections at high energies is extended now to the electron-proton deep inelastic scattering. The proposed method is based on joint usage of the PEGASUS and CASCADE Monte-Carlo event generators, which deal with the transverse momentum dependent (TMD) gluon and quark densities in a proton. First of them, PEGASUS, is applied to produce off-shell photon-gluon fusion events. Then, to properly simulate the kinematics of the produced jets, the TMD parton shower algorithm implemented into the CASCADE is used. We demonstrate basic features of the approach considering latest H1 and ZEUS data on prompt photon plus jet production at low $Q^2$ collected at HERA. We achieve a good description of the measurements and point out that a correct simulation of parton showers is essential for studying non-inclusive processes at high energies within the TMD-based approaches.

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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