Transverse momentum spectra and nuclear modification factors of charged particles in Xe–Xe collisions at sNN=5.44TeV
Transverse momentum spectra and nuclear modification factors of charged particles in Xe–Xe collisions at sNN=5.44TeV
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DOI：
10.1016/j.physletb.2018.10.052
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发表时间：
2018-05
影响因子：
4.4
通讯作者：
S. Acharya;Yosuke Watanabe;G. Bíró;M. Varga-Kofarago;R. Majka;S. Weber;M. Bregant;G. Neskovic-G.-Neskovi
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文献类型：
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作者：
S. Acharya;Yosuke Watanabe;G. Bíró;M. Varga-Kofarago;R. Majka;S. Weber;M. Bregant;G. Neskovic-G.-Neskovi
报道了在大型强子对撞机上用ALICE装置测量的SN = 5.44TeV的Xe-Xe碰撞中中赝快度带电粒子的横动量谱。运动学范围0.15< p T< 50 GeV/c，| η| < 0.8已覆盖结果在9类碰撞中心在0-80%的范围内。为了比较，PP参考在碰撞能量为s= 5.44 TeV的获得通过在现有的PP测量在s= 5.02和7 TeV之间进行插值。在质心能量sNN = 5.02TeV和2.76TeV的情况下，在相似的带电粒子多重数密度<dNch/d η>范围内，中心Xe-Xe碰撞和Pb-Pb碰撞的核修正因子在pT> 10 GeV/c时表现出显著的相似性。的中心依赖性的比例的平均横向动量< p T>在Xe-Xe碰撞超过铅-铅碰撞在s= 5.02 TeV的流体动力学模型计算进行了比较。
Transverse momentum (p T) spectra of charged particles at mid-pseudorapidity in Xe–Xe collisions at s NN= 5.44 TeV measured with the ALICE apparatus at the Large Hadron Collider are reported. The kinematic range 0.15< p T< 50 GeV/c and| η|< 0.8 is covered. Results are presented in nine classes of collision centrality in the 0–80% range. For comparison, a pp reference at the collision energy of s= 5.44 TeV is obtained by interpolating between existing pp measurements at s= 5.02 and 7 TeV. The nuclear modification factors in central Xe–Xe collisions and Pb–Pb collisions at a similar center-of-mass energy of s NN= 5.02 TeV, and in addition at 2.76 TeV, at analogous ranges of charged particle multiplicity density< d N ch/d η> show a remarkable similarity at p T> 10 GeV/c. The centrality dependence of the ratio of the average transverse momentum< p T> in Xe–Xe collisions over Pb–Pb collision at s= 5.02 TeV is compared to hydrodynamical model calculations.