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首页> 外文期刊>Physical review, C >Transverse momentum fluctuations in ultrarelativistic Pb plus Pb and p plus Pb collisions with 'wounded' quarks
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Transverse momentum fluctuations in ultrarelativistic Pb plus Pb and p plus Pb collisions with 'wounded' quarks

机译：与“受伤”夸克的横向Pb PL PB和P Plus PB碰撞中的横向动量波动

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摘要

We analyze the phenomenon of size-flow transmutation in ultrarelativistic nuclear collisions in a model where the initial size fluctuations are driven by the wounded quarks and the collectivity is provided by viscous hydrodynamics. It is found that the model properly reproduces the data for the transverse momentum fluctuations measured for Pb+Pb collisions at root s(NN) = 2.76 TeV by the ALICE Collaboration. The agreement holds for a remarkably wide range of centralities, from 0-5 % up to 70-80 %, and displays a departure from a simple scaling with (dN(ch)/d eta)(1/2) in the form seen in the data. The overall agreement in the model with wounded quarks is significantly better than with nucleon participants. This feature joins the previously found wounded quark multiplicity scaling in the argumentation in favor of subnucleonic degrees of freedom in the early dynamics. We also examine in detail the correlations between measures of the initial size and final average transverse momentum of hadrons. Predictions are made for the transverse momentum fluctuations in p+Pb collisions at root s(NN) = 5.02 TeV.
机译：我们在一个模型中分析了超相对论核碰撞中的尺寸流嬗变现象，其中初始尺寸涨落由受伤的夸克驱动，总体由粘性流体力学提供。发现该模型正确地再现了ALICE协作在根s（NN）=2.76 TeV处测量的Pb+Pb碰撞横向动量涨落的数据。该协议适用于非常广泛的中心度范围，从0-5%到70-80%，并显示出与数据中所示的（dN（ch）/d eta）（1/2）形式的简单缩放不同。模型中受伤夸克的整体一致性明显好于核子参与者。这一特征加入了之前在论证中发现的受伤夸克多重性标度，有利于早期动力学中的亚核自由度。我们还详细研究了强子的初始尺寸和最终平均横向动量之间的相关性。对根s（NN）=5.02 TeV的p+Pb碰撞中的横向动量涨落进行了预测。

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