论文标题
基于强子生产的两个组件模型的高能量A-B核冲突的已识别 - hadron $ \ bf P_T $光谱的差异比较
Differential comparison of identified-hadron $\bf p_t$ spectra from high-energy A-B nuclear collisions based on a two-component model of hadron production
论文作者
论文摘要
在高能核冲突中，通过两种组件（软 +硬）模型（软 +硬）模型（TCM）分析了从2.76 TEV PB-PB和$ P $ - $ P $碰撞中识别出的Hadron（PID）光谱。 PID TCM对最近对PID HADRON光谱的分析进行了较小的变化，从5 TEV $ P $ -PB碰撞。将LHC数据的结果与200 GEV Au-au和质子光谱的PID TCM进行了比较。 2.76 TEV质子光谱通过将$ p $ - $ p $频谱与相应的TCM进行比较，表现出强大的低效率高于1 GEV/C。效率低下后，PB-PB质子光谱与Au-Au质子光谱非常相似。 PID A-A光谱通常与径向流动不一致。与喷气相关的PB-PB和AU-AU光谱硬组件在更中央碰撞中表现出强烈的抑制作用，与Spectrum比率$ R_ {AA} $的结果相对应，但对于Pions和Kaons，均与P_T = 1 $ GEV/C的戏剧性增强= 1 $ gev/c shupt $ r_ shupt $ r_ r_ r_ {aa a n $ r r r r r r_ {aa} $。相反，质子硬组件的增强仅在1 GEV/C以上出现，这表明Baryon/Meson“ Puzzzle”是一种喷气现象。修改更中央A-A碰撞中的光谱硬组件与射流形成过程中的GLUON分裂的增加是一致的，但通过较低的$ P_T $增强功能在射流中近似地保护领先的Parton Energy。
Identified-hadron (PID) spectra from 2.76 TeV Pb-Pb and $p$-$p$ collisions are analyzed via a two-component (soft + hard) model (TCM) of hadron production in high-energy nuclear collisions. The PID TCM is adapted with minor changes from a recent analysis of PID hadron spectra from 5 TeV $p$-Pb collisions. Results from LHC data are compared with a PID TCM for 200 GeV Au-Au pion and proton spectra. 2.76 TeV proton spectra exhibit strong inefficiencies above 1 GeV/c estimated by comparing the $p$-$p$ spectrum with the corresponding TCM. After inefficiency correction Pb-Pb proton spectra are very similar to Au-Au proton spectra. PID A-A spectra are generally inconsistent with radial flow. Jet-related Pb-Pb and Au-Au spectrum hard components exhibit strong suppression at higher $p_t$ in more-central collisions corresponding to results from spectrum ratio $R_{AA}$ but also, for pions and kaons, exhibit dramatic enhancements below $p_t = 1$ GeV/c that are concealed by $R_{AA}$. In contrast, enhancements of proton hard components appear only above 1 GeV/c suggesting that the baryon/meson "puzzle" is a jet phenomenon. Modification of spectrum hard components in more-central A-A collisions is consistent with increased gluon splitting during jet formation but with approximate conservation of leading-parton energy within a jet via the lower-$p_t$ enhancements.
