论文标题
用$ \ sqrt {\ it {s} _ {\ mathrm {nn}}} $ = 2.76和5.02 TEV，在$ \ sqrt {\ it {s} _ {\ it {s} _ {
Constraining the Chiral Magnetic Effect with charge-dependent azimuthal correlations in Pb-Pb collisions at $\sqrt{\it{s}_{\mathrm{NN}}}$ = 2.76 and 5.02 TeV
论文作者
论文摘要
$ \ sqrt {\ it {s} _ \ Mathrm {nn}} = $ 2.76和5.02 TEV的PB-PB碰撞中电荷依赖性的两粒子相关性的系统研究。这些测量值是针对假粒子（$η$）和横向动量（$ p _ {\ rm {t}} $）范围$ \ left | left |η\ right |执行的。 <0.8 $和$ 0.2 <p _ {\ mathrm {t}} <5 $ gev/$ c $。报道了CME敏感相关器$γ_{1,1} = \ langle \ cos（φ_α +φ_β-2ψ_{2}）\ cos（2}） 2ψ_{2}）\ rangle $。结果用于估计背景效应的贡献，与局部电荷保护相关的局部电荷保护与各向异性流量调制相关，以测量CME。一种爆炸波参数化，其中包含调谐以重现中心性背景效应的局部电荷保护，无法完全描述所测量的$γ_{1,1} $。最后，混合 - 野战三粒子相关的电荷和中心性依赖性，形式为$γ_{1,2} = \ langle \ cos（φ_α +2φ_β-3ψ_{3}）\ rangle $，对CME信号不敏感，对CME信号不敏感，verify carlife condify condify corminate $ native $ noutals $ nocutions $ nocutions $ nocutions $ nocuntion $ nocations $ nocation_ $ nocationd $ nocation_ $ nocationd $。
Systematic studies of charge-dependent two- and three-particle correlations in Pb-Pb collisions at $\sqrt{\it{s}_\mathrm{NN}} = $ 2.76 and 5.02 TeV used to probe the Chiral Magnetic Effect (CME) are presented. These measurements are performed for charged particles in the pseudorapidity ($η$) and transverse momentum ($p_{\rm{T}}$) ranges $\left|η\right| < 0.8$ and $0.2 < p_{\mathrm{T}} < 5$ GeV/$c$. A significant charge-dependent signal that becomes more pronounced for peripheral collisions is reported for the CME-sensitive correlators $γ_{1,1} = \langle \cos (φ_α +φ_β - 2Ψ_{2}) \rangle$ and $γ_{1,-3} = \langle \cos (φ_α -3φ_β + 2Ψ_{2}) \rangle$. The results are used to estimate the contribution of background effects, associated with local charge conservation coupled to anisotropic flow modulations, to measurements of the CME. A blast-wave parametrisation that incorporates local charge conservation tuned to reproduce the centrality dependent background effects is not able to fully describe the measured $γ_{1,1}$. Finally, the charge and centrality dependence of mixed-harmonics three-particle correlations, of the form $γ_{1,2} = \langle \cos (φ_α +2φ_β - 3Ψ_{3}) \rangle$, which are insensitive to the CME signal, verify again that background contributions dominate the measurement of $γ_{1,1}$.
