论文标题
在RHIC上使用鉴定颗粒的各向异性流搜索手性磁波
Search for the chiral magnetic wave using anisotropic flow of identified particles at RHIC
论文作者
论文摘要
理论上将手性磁性波（CMW）在高能重型离子碰撞中形成的核培养基中传播，并在负电荷的Hadron和正带电之间引起椭圆流（$ V_ {2} $）的差异。根据pion $ v_ {2} $的电荷不对称依赖性，来自$ \ sqrt {s _ {s _ {\ rm nn}} $ = 27 $ = 27 $ = 27至200 g27 = 27至200 geev，pion $ v_ {2} $的电荷不对称依赖性报告了与CMW一致的实验数据。在这项全面的研究中，我们介绍了带电乳头的椭圆流和三角形流的恒星测量，以及$ v_ {2} $的电荷kaons和proton的$ v_ {2} $，作为$+au碰撞中的电荷不对称的函数，$ \ \ sqrt {报告了不同粒子物种的电荷不对称差异的线性依赖性提取的斜率参数，并以不同的中心性间隔进行了比较。此外，对于小型系统中充电的茶，\ textIt {i.e。}，$ p $+au和$ p $+au和$ \ sqrt {s _ {\ rm nn}} $ = 200 gev的斜率，与大整个系统相比， $ \ sqrt {s _ {\ rm nn}} $ = 200 Gev和u+u在193 GEV。我们的结果为CMW的可能存在提供了新的见解，并进一步限制了Rhic Energies重型离子碰撞中的背景贡献。
The chiral magnetic wave (CMW) has been theorized to propagate in the deconfined nuclear medium formed in high-energy heavy-ion collisions, and to cause a difference in elliptic flow ($v_{2}$) between negatively and positively charged hadrons. Experimental data consistent with the CMW have been reported by the STAR Collaboration at the Relativistic Heavy Ion Collider (RHIC), based on the charge asymmetry dependence of the pion $v_{2}$ from Au+Au collisions at $\sqrt{s_{\rm NN}}$ = 27 to 200 GeV. In this comprehensive study, we present the STAR measurements of elliptic flow and triangular flow of charged pions, along with the $v_{2}$ of charged kaons and protons, as a function of charge asymmetry in Au+Au collisions at $\sqrt{s_{\rm NN}}$ = 27, 39, 62.4 and 200 GeV. The slope parameters extracted from the linear dependence of the $v_2$ difference on charge asymmetry for different particle species are reported and compared in different centrality intervals. In addition, the slopes of $v_{2}$ for charged pions in small systems, \textit{i.e.}, $p$+Au and $d$+Au at $\sqrt{s_{\rm NN}}$ = 200 GeV, are also presented and compared with those in large systems, \textit{i.e.}, Au+Au at $\sqrt{s_{\rm NN}}$ = 200 GeV and U+U at 193 GeV. Our results provide new insights for the possible existence of the CMW, and further constrain the background contributions in heavy-ion collisions at RHIC energies.
