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Improvement of heavy flavor production in a multiphase transport model updated with modern nuclear parton distribution functions

机译:用现代核Parton分布函数更新多相输送模型中重型风味生产的改进

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摘要

Recently we updated a multiphase transport (AMPT) model with modern parton distribution functions of nuclei (nPDFs). Here we study open charm production in the updated AMPT model and compare to the experimental data from pp and AA collisions over a wide range of collision energies. Besides the update of nPDFs, we removed the transverse momentum cutoff on initial heavy quark productions and also included the resultant heavy flavor cross section into the total minijet cross section in the initial condition as described by the HIJING model. We show that the AMPT model with these updates provides a much better description of the yields and transverse momentum spectra of various open charm hadrons in comparison with the experimental data. This lays the foundation for further heavy flavor studies within the transport model approach.
机译:最近,我们更新了具有核(NPDF)的现代Parton分布函数的多相传输(AMPT)模型。 在这里,我们在更新的AMPT模型中研究了开放式魅力生产,并与PP和AA碰撞的实验数据进行比较,在各种碰撞能量上。 除了NPDF的更新之外,我们除以初始重型夸克制作的横向动量截止,还包括所得的重型风味横截面,以恒景模型所描述的初始条件中的总密度横截面。 我们展示了具有这些更新的AMPT模型提供了与实验数据相比各种开放式魅力强度的产量和横向动量的更好描述。 这为运输模型方法进行了进一步重的风味研究。

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