arXiv 1603.013372016-03hep-ph

相对论重离子对撞机和大型强子对撞机上$p$ - $p$碰撞$p_t$谱的电荷多重数和碰撞能量依赖性

Charge-multiplicity and collision-energy dependence of $p_t$ spectra from $p$-$p$ collisions at the relativistic heavy-ion collider and large hadron collider

Thomas A. Trainor

备注：: 24 pages, 22 figures
DOI：: 10.1088/1361-6471/aa759e

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摘要：

本文将相对论重离子对撞机（RHIC）上200 GeV p-p碰撞产生强子的两分量（软+硬）模型（TCM）推广到描述13 TeV以下的大型强子对撞机（LHC）上的p-p能谱数据.大型强子对撞机的数据包括光谱比，仅提供TCM的部分信息。LHC比率方法被施加到众所周知的200 GeV的光谱数据，以获得一个代数之间的联系，光谱比和完整的TCM。横向动量硬分量的形式的某些方面被发现是$n_{ch}$依赖。然后分析LHC谱比以获得孤立的软和硬TCM谱分量的$n_{ch}$和碰撞能量（超过三个数量级）依赖性。的能量依赖性的频谱软分量是一个新的结果，表明关系到Gribov扩散。光谱硬分量的变化简单而平稳的$n_{ch}$建议的基础喷流光谱的偏差和线性QCD参数$\log(s/s_0)$，其属性与最小偏差重建喷流光谱测量一致。

英文摘要：

A two-component (soft + hard) model (TCM) of hadron production in yields and spectra derived from the charge-multiplicity dependence of 200 GeV p-p collisions at the relativistic heavy ion collider (RHIC) is extended to describe p-p spectrum data from the large hadron collider (LHC) up to 13 TeV. The LHC data include spectrum ratios that provide only partial information on the TCM. The LHC ratio method is applied to well-understood 200 GeV spectrum data to derive an algebraic link between spectrum ratios and the full TCM. Some aspects of the form of the hard component on transverse momentum are found to be $n_{ch}$ dependent. LHC spectrum ratios are then analyzed to obtain $n_{ch}$ and collision-energy (over three orders of magnitude) dependence of isolated soft and hard TCM spectrum components. The energy dependence of the spectrum soft component is a new result suggesting a relation to Gribov diffusion. The spectrum hard component varies simply and smoothly with $n_{ch}$ suggesting bias of the underlying jet spectrum and linearly with QCD parameter $\log(s/s_0)$, its properties consistent with minimum-bias reconstructed-jet spectrum measurements.

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