Heavy Flavor Production in Heavy Ion Collisions

这个项目包括对高能强子-强子、强子-核和核-核碰撞中重夸克（粲夸克和底夸克）的产生进行详细的研究。 同时具有零和非零粲和/或底量子数的重夸克强子将被研究。 具有非零魅力和/或底量子数的强子，称为开重夸克强子，当它们通过产生它们的系统传播时，预计会有很大的相互作用截面，导致它们的动量分布发生可观察到的变化。 具有零粲和/或底量子数的强子被称为夸克偶素。 夸克偶素产生的速率会受到冷核物质和重离子碰撞中产生的热而致密的夸克物质的影响。挑战在于区分重离子碰撞环境中的两种改性来源。在本项目的过程中，将使用最新的理论技术对实验性粲产生数据进行审查和重新评估。 这一审查将有助于将所有数据置于更平等的基础上，并提供一个更可靠的背景，以与现代数据进行比较。将在布鲁克海文国家实验室的相对论重离子对撞机以及欧洲核研究中心的大型强子对撞机上对基线重夸克产生进行计算，以供将来测量。 冷核物质对粲夸克偶素和底夸克偶素的影响将与现有数据进行比较。 这些夸克偶素态的致密物质效应也将被重新讨论。

This project involves performing detailed studies of heavy quark (charm and bottom) production in high energy hadron-hadron, hadron-nucleus and nucleus-nucleus collisions. Heavy quark hadrons with both zero and nonzero charm and/or bottom quantum numbers will be studied. Hadrons with nonzero charm and/or bottom quantum numbers, called open heavy quark hadrons, are expected to have large interaction cross sections as they propagate through the system in which they are produced, leading to observable changes in their momentum distributions. Hadrons with zero charm and/or bottom quantum numbers are called quarkonium. The rate of quarkonium production is modified by both cold nuclear matter and the hot, dense quark matter created in heavy-ion collisions. The challenge is to distinguish between the two sources of modification in the environment of aheavy-ion collision.During the course of this project the experimental charm production data will be reviewed and re-evaluated using up-to-date theoretical techniques. This review will help place all data on a more equal footing and provide a more reliable context to compare to modern data. Calculations of baseline heavy quark production will be made for future measurements at the Relativistic Heavy Ion Collider at Brookhaven National Laboratory as well as at the Large Hadron Collider at the European Center for Nuclear Research. Cold nuclear matter effects on charm and bottom quarkonium will be made and compared to availabledata. Dense matter effects on these quarkonium states will also be revisited.