论文标题
j/$ψ$椭圆形和三角形流$ \ sqrt {s _ {\ rm nn}} $ = 5.02 TEV
J/$ψ$ elliptic and triangular flow in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV
论文作者
论文摘要
包含的J/$ψ$椭圆形（$ v_2 $）和三角形（$ v_3 $）流量系数在远期快速度（2.5 $ <y <$ 4）和$ v_2 $以中期（$ | y | y | <$ 0.9）在$ \ sqrt te $ \ sqrt tev inv in n n n n n n n n n n n n N.报告了LHC的爱丽丝探测器。运行2期间收集的整个PB-PB数据样本均采用，相当于远期快速时的750 $ $ $ $ $ b $^{ - 1} $，在中等差异为93 $ $ $ $ b $^{ - 1} $。结果是使用标量产品方法获得的，并根据横向动量$ p _ {\ rm t} $和碰撞中心性报告。在中期，J/$ψ$ $ $ v_2 $与远期速度测量一致。中心度平均结果表明，在$ p _ {\ rm t} $ grange $ 2 <p _ {\ rm t} <5 $ gev/$ c $的$ p _ {\ rm t} $ grang $ 2 <p _ {\ rm t} $ grang $ 2 <p _ {\ rm t} $ rang rangy中，正向快速的重要性超过5 $σ$。远期快速性$ v_2 $，$ v_3 $和$ v_3 $/$ v_2 $在低和中间$ p _ {\ rm t} $（$ p _ {$ p _ {\ rm t} \ rm t} \ lyssim 8 $ gev/$ c $）与pers and pers and culte cul cul cul cul cul cul tose cultiped culty-clisection cul cul cul cul cultect $ p _ {\ rm t} $。在低和中间的$ p _ {\ rm t} $下，与光夸克相比，可以用后来的魅力夸克的热化来解释结果，而在高$ p _ {\ rm t} $时，速度依赖效果似乎是主导的。与微观传输模型计算相比，J/$ψ$ $ $ v_2 $的测量值更进一步。使用涉及光和魅力夸克流量组件的夸克缩放量方法的简化扩展，可以根据带电的pions和j/$ψ$流量的d-Meson $ v _ {\ rm n} $测量来描述D-Meson $ v _ {\ rm n} $测量。
The inclusive J/$ψ$ elliptic ($v_2$) and triangular ($v_3$) flow coefficients measured at forward rapidity (2.5 $<y<$ 4) and the $v_2$ measured at midrapidity ($|y|<$ 0.9) in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 5.02 TeV using the ALICE detector at the LHC are reported. The entire Pb-Pb data sample collected during Run 2 is employed, amounting to an integrated luminosity of 750 $μ$b$^{-1}$ at forward rapidity and 93 $μ$b$^{-1}$ at midrapidity. The results are obtained using the scalar product method and are reported as a function of transverse momentum $p_{\rm T}$ and collision centrality. At midrapidity, the J/$ψ$ $v_2$ is in agreement with the forward rapidity measurement. The centrality averaged results indicate a positive J/$ψ$ $v_3$ with a significance of more than 5$σ$ at forward rapidity in the $p_{\rm T}$ range $2<p_{\rm T}<5$ GeV/$c$. The forward rapidity $v_2$, $v_3$, and $v_3$/$v_2$ results at low and intermediate $p_{\rm T}$ ($p_{\rm T} \lesssim 8$ GeV/$c$) exhibit a mass hierarchy when compared to pions and D mesons, while converging into a species-independent curve at higher $p_{\rm T}$. At low and intermediate $p_{\rm T}$, the results could be interpreted in terms of a later thermalization of charm quarks compared to light quarks, while at high $p_{\rm T}$, path-length dependent effects seem to dominate. The J/$ψ$ $v_2$ measurements are further compared to a microscopic transport model calculation. Using a simplified extension of the quark scaling approach involving both light and charm quark flow components, it is shown that the D-meson $v_{\rm n}$ measurements can be described based on those for charged pions and J/$ψ$ flow.
