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arXiv 1502.04185hep-phnucl-th
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LHC p-p碰撞中集体流的证据

Evidence of Collective Flow in p-p Collision at LHC

Inam-ul Bashir, Riyaz Ahmed Bhat, Saeed Uddin

摘要:

用统一的统计热冻结模型研究了能量分别为0.9TeV、2.76TeV和7.0TeV的强子在LHC中碰撞产生的横动量分布。理论计算与实验数据吻合较好。提取的热冻结参数揭示了显着的集体流动和一个明确的温度在系统中的存在,从而表明在LHC的p-p碰撞形成的热平衡的流体动力学系统。还成功地再现了Root(sNN)= 200 GeV的p-p碰撞中产生的质子和K介子的横向动量分布。该模型包括纵向以及横向的流体动力学流。较重的衰变共振的贡献也被考虑在内。

英文摘要:

The transverse momentum distributions of hadrons produced in p-p collisions at LHC energies of Root(sNN) = 0.9 TeV, 2.76 TeV and Root(sNN) = 7.0 TeV have been studied using a unified statistical thermal freeze-out model. A good agreement is seen between the theoretical calculations and experimental data. The extracted thermal freeze-out parameters reveal the presence of significant collective flow and a well defined temperature in the system thus indicating the formation of a thermally equilibrated hydrodynamic system in p-p collisions at LHC. The transverse momentum distributions of protons and Kaons produced in p-p collisions at Root(sNN) = 200 GeV have also been reproduced successfully. The model incorporates a longitudinal as well as transverse hydrodynamic flow. The contributions from heavier decay resonances have also been taken into account.

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