论文标题
开放式风味介子的生产机制
Production mechanisms of open-heavy flavor mesons
论文作者
论文摘要
在本文中，我们讨论了开放式风味梅森生产的不同机制。使用颜色偶极子框架，我们详细分析了常规的两杆融合和三杆融合校正的贡献。以无参数的方式，我们发现三杆机制对于$ d $ -Meson的生产在小$ p_ {t} $ kinematics中很重要，尽管它在大$ p_ {t} $以及$ b $ -Mesons中的重要性不太重要。包含三杆机制可以显着提高理论预测的一致性，并在小$ p_ {t} $ kinematics中的实验数据。我们还考虑了非癌症的生产，并证明理论结果与实验数据是合理的一致性。最后，我们比较了对共同生产的Hadron的依赖性的理论预测与最近通过Alice Collaboration测量的实验数据。我们发现，与幼稚的期望相反，三蛋白酶机制的贡献仅对在爱丽丝研究的多个多重性范围内的自相应可观察到的无度影响，因此，两-Pomeron融合机制可以很好地描述实验观察到的多重性依赖性。
In this paper we discuss different mechanisms of open-heavy flavor meson production. Using the color dipole framework, we analyze in detail the contributions of the conventional two-pomeron fusion and the three-pomeron fusion correction. In a parameter-free way we found that the three-pomeron mechanism is significant for $D$-meson production in the small-$p_{T}$ kinematics, although it is less important at large $p_{T}$, as well as for $B$-mesons. The inclusion of the three-pomeron mechanism significantly improves the agreement of theoretical predictions with experimental data in the small-$p_{T}$ kinematics. We also consider the non-prompt charmonia production, and demonstrate that the theoretical results are in reasonable agreement with experimental data. Finally, we compare the theoretical predictions for the dependence on multiplicity of co-produced hadrons to experimental data recently measured by the ALICE collaboration. We found that, contrary to naive expectations, the contribution of the three-pomeron mechanism has only a mild effect on the self-normalized observables in the range of multiplicities studied at ALICE, and for this reason the two-pomeron fusion mechanism can describe reasonably well the experimentally observed multiplicity dependence.
