U.S.-Hungary Theoretical Physics Research: Perturbative Quantum Chromodynamics (pQCD) Background in Relativistic Heavy-Ion Collisions

INT 0000211 FaiThis美国-匈牙利肯特州立大学的乔治费与粒子与核物理研究所的彼得莱维和布达佩斯埃特沃斯大学的加博尔帕普合作的研究项目将研究微扰量子色动力学（pQCD）。 我们的目标是扩大我们的理解大横动量粒子生产数据的强子和核碰撞在很宽的能量范围。本项目研究相对论重离子对撞机（RHIC）核碰撞中的粒子产生，目的是确定夸克胶子等离子体（QGP）等非平凡集体现象的存在。研究人员的工作将以理论描述这种相对论重离子碰撞中的观测值为特色。美国--匈牙利团队将试图确定一个运动学窗口，在那里测量的光子，轻子和强子数据揭示了QGP的形成或其他一些强相互作用物质的奇异状态的出现。 计划包括发展一个基于pQCD的唯象模型来描述实验数据，并确定是否需要真正的集体效应，例如QGP的形成来重现数据。 如果成功的话，数据所揭示的真正的集体效应将进一步加深我们对强相互作用物理学的理解。 这些新知识对于高能核物理学的进步至关重要，也应该为天体物理学和宇宙学做出贡献。核与粒子物理学的这个项目通过使美国和中欧的专家能够实现推进科学知识的计划目标。联合收割机互补人才并在相互感兴趣和能力强的领域共享研究资源。

INT 0000211FaiThis U.S.-Hungary research project between George Fai of Kent State University and partners Peter Levai of the Institute for Particle and Nuclear Physics and Gabor Papp of Eotvos University, Budapest, will examine perturbative quantum chromodynamics (pQCD). The objective is to expand our understanding of large transverse-momentum particle production data from hadronic and nuclear collisions in a wide energy range. This project examines particle production in nuclear collisions at the Relativistic Heavy Ion Collider (RHIC) with the intent of ascertaining the presence of nontrivial collective phenomena such as the quark-gluon plasma (QGP). Researcher efforts will feature theoretical description of observables in such relativistic heavy-ion collisions. The U.S.-Hungary team will attempt to identify a kinematical window, where the measured photon, lepton and hadron data reveal either QGP formation or the appearance of some other exotic state of strongly interacting matter. Plans include the development of a phenomenological model based on pQCD to describe the experimental data and to determine whether genuine collective effects, e.g. QGP formation, are necessary to reproduce the data. If successful, genuine collective effects revealed by the data will further our understanding of strong-interaction physics. Such new knowledge is critical for the progress of high-energy nuclear physics and should contribute to astrophysics and cosmology as well.This project in nuclear and particle physics fulfills the program objective of advancing scientific knowledge by enabling experts in the United States and Central Europe to combine complementary talents and share research resources in areas of strong mutual interest and competence.