研究重离子碰撞中电场对流谐波的作用
Investigating the Role of Electric Fields on Flow Harmonics in Heavy-Ion Collisions
AI总结：
本研究利用爆炸波模型探究重离子碰撞中电场对带电π介子和质子流谐波的影响，纳入电场与耗散的单粒子分布一阶修正，发现电场对直接流、椭圆流有显著修正且存在质量依赖，还讨论了粒子与反粒子椭圆流劈裂。
摘要：
我们利用blast-wave模型（爆炸波模型），探究电场对带电π介子与质子的能谱及流谐波（尤其是椭圆流）的影响。在计算冻出超曲面上Cooper-Frey框架下的强子不变产额时，我们纳入了电场带来的单粒子分布函数一阶修正，以及耗散效应。研究发现，对于横向平面内大小约为$m_π^{2}$的单向电场和方位角不对称电场，π介子与质子的直接流和椭圆流均存在显著修正。此外，我们观测到电场产生的直接流具有质量依赖性，还讨论了粒子与反粒子椭圆流的劈裂现象。
英文摘要：
Using the blast-wave model, we explore the effect of electric fields on spectra and flow harmonics (especially the elliptic flow) for charged pions and protons. We incorporate the first-order correction to the single-particle distribution function due to the electric fields and the dissipative effect while calculating the invariant yields of hadron in the Cooper-Frey prescription at the freezeout hypersurface. We find a noticeable correction to the directed and elliptic flow of pions and protons for unidirectional and azimuthal asymmetric electric fields in the transverse plane of magnitude $\sim m_π^{2}$. Further, we observe mass dependency of the directed flow generated due to the electric fields. The splitting of particle and antiparticle's elliptic flow is also discussed.
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