论文标题
相对论重型离子碰撞中的夸克夸克组合机制中的椭圆流的椭圆流
Elliptic flow of hadrons in equal-velocity quark combination mechanism in relativistic heavy-ion collisions
论文作者
论文摘要
我们应用了具有相等速度组合（EVC）近似值的夸克组合模型，以研究重型离子碰撞中的椭圆流（$ v_ {2} $）在宽碰撞能量范围内（$ \ sqrt {s_ {s_ {nn}} = $ 27-5020 gev）。利用Hadron的$ V_ {2} $之间的简单关系和EVC下的夸克的关系之间，我们发现通过Proton的实验数据获得的上/下夸克的$ V_ {2} $与$λ$和$ξ$获得的数据一致。 $ v_ {2} $由$ω$的数据获得的奇怪的夸克与$λ$和$ξ$获得的$ v_ {2} $，在rhic Energies中获得的$ v_ {2} $与$ ϕ $获得的数据一致。这意味着这些Hadron的$ V_ {2} $具有通用的夸克级源。使用$ d^0 $的数据，我们获得了$ v_ {2} $的夸张夸克，$ p_t \ lysesim 6 $ gev/c。我们发现，在EVC Charm Quark下，$ v_ {2} $ $ d $ Meson的低$ p_ {t} $，但Light-Flavor Quarks在$ 3 \ 3 \ 3 \ 3 \ listsim p_ p_ {t} t} \ sillsimsim8 $ gev的范围内$ v_ {2} $ of $ v_ {2} $。我们预测，Charmed Baryons的$ V_ {2} $ $λ_{C}^{+} $和$ξ_{C}^{0} $，由于轻型夸张夸克的双重贡献，在中间$ p_ {t} $上显示出显着的增强。研究了EVC下获得的Quark $ v_ {2} $的属性，并找到了Quarks的$ v_ {2} $的规律性，作为$ p_ {t}/m $的函数。
We apply a quark combination model with equal-velocity combination (EVC) approximation to study the elliptic flow ($v_{2}$) of hadrons in heavy-ion collisions in a wide collision energy range ($\sqrt{s_{NN}}=$ 27 - 5020 GeV). Utilizing the simple relationship between $v_{2}$ of hadrons and those of quarks under EVC, we find that $v_{2}$ of up/down quarks obtained by experimental data of proton is consistent with that obtained by data of $Λ$ and $Ξ$. $v_{2}$ of strange quarks obtained by data of $Ω$ is consistent with that obtained by data of $Λ$ and $Ξ$, and at RHIC energies it is also consistent with that obtained by data of $ϕ$. This means that $v_{2}$ of these hadrons have a common quark-level source. Using data of $D^0$, we obtain $v_{2}$ of charm quarks with $p_T\lesssim 6$ GeV/c. We find that under EVC charm quark dominates $v_{2}$ of $D$ mesons at low $p_{T}$ but light-flavor quarks significantly contribute to $v_{2}$ of $D$ mesons in the range $3\lesssim p_{T}\lesssim8$ GeV/c. We predict $v_{2}$ of charmed baryons $Λ_{c}^{+}$ and $Ξ_{c}^{0}$ which show a significant enhancement at intermediate $p_{T}$ due to the double contribution of light-flavor quarks. The properties of the obtained quark $v_{2}$ under EVC are studied and a regularity for $v_{2}$ of quarks as the function of $p_{T}/m$ is found.
