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arXiv 2108.09965hep-exnucl-ex
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利用Pythia 8事件发生器在质心能量√s = 13 TeV的质子-质子碰撞中产生开放粲夸克

Open Charm production in proton-proton collisions at $\sqrt{s}$ = 13.6 TeV with Pythia event generator

CGC University(CGC大学)

Randhir Singh

AI总结:

该研究利用PYTHIA 8事件发生器,通过D⁺、D⁰、Dₛ⁺和Λc⁺强子产生,探究质心能量√s = 13 TeV的质子-质子碰撞中粲夸克产生过程及强子化可能性,以检验pQCD计算并研究QGP性质和部分子介质能量损失。

摘要:

粲夸克和底夸克是重夸克,质量分别为1.28 GeV/c²和4.18 GeV/c²,在初始硬散射过程中产生。因其形成时间比LHC中QGP的形成时间短,能经历重离子碰撞中热密介质时间演化的所有阶段。测量开放粲夸克和底夸克产生有助于探究QGP性质及部分子介质能量损失的色荷和质量依赖性。本研究旨在通过D⁺、D⁰、Dₛ⁺和Λc⁺强子的产生来理解粲夸克产生过程,还测量了如Λc⁺/D⁺等比率以研究粲夸克强子化可能性。分析中使用PYTHIA 8生成质心能量√s = 13 TeV的质子-质子碰撞事件,PYTHIA 8在解释LHC能量下重味粒子产生方面很成功。

英文摘要:

Charm and beauty are heavy quarks with observed masses of 1.28 GeV/$\textit{c}^2$ and 4.18 GeV/$\textit{c}^2$ respectively. They are produced in initial hard scattering processes. Due to their small formation time ($Δt \sim0.1 fm/\textit{c}$) as compared to the formation time of QGP ($Δt \sim0.3 fm/\textit{c}$) at the LHC, they experience all the stages occuring during the time evolution of the hot and dense medium produced in heavy-ion collisions. Therefore, the measurement of open charm and beauty production allows probing QGP properties and investigating the color charge and mass dependence of the parton in-medium energy loss. Moreover, due to their large masses ($m_c , m_b \gg Λ_{QCD}$ ) their pp production cross-sections are calculable within the domain of perturbative QCD constituting an excellent test of pQCD calculations. The aim of this study is to understand the processes involved in the production of charm quarks through the productions of D$^+$, D$^0$, D$^+_s$ and $Λ_c^+$ hadrons. Further to investigate the possibility of hadronization of the charm quarks, ratios like $Λ_c^+$/$D^+$, $D_s^+$/$D^+$, $Λ_c^+$/$D^0$ and $D_s^+$/$D^0$ are also measured. For the current analysis, the events are generated by using PYTHIA 8 for pp collisions at $\sqrt{s}$ = 13 TeV. PYTHIA 8 has proved to be quite successful in explaining the heavy-flavor particle production at the LHC energies.

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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