arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1006.5899nucl-thhep-ph
收藏

高能重离子碰撞中的压缩K^+ K^-关联

Squeezed K^+ K^- correlations in high energy heavy ion collisions

Danuce M. Dudek, Sandra S. Padula

摘要:

高能重离子碰撞中形成的热而稠密的介质可能会改变某些强子性质。特别是,如果强子质量在介质中移动,它被证明,这可能会导致背靠背压缩关联(BBC)的粒子-反粒子对。虽然理论上已经很好地建立了,但是压缩关联还没有在实验上被发现。已经提出了一种方法,用于经验搜索这种效果,这是以前说明的φ-φ对。我们在这里将形式和建议的方法应用于K^+ K^-对的情况,因为它们可能更容易在实验上识别。发射过程的时间分布对BBC的生存起着至关重要的作用。我们分析的情况下,发射应该是突然发生或通过洛伦兹分布,并与列维分布的情况下,在时间上进行比较。分析了压缩效应对全同粒子关联函数的影响。

英文摘要:

The hot and dense medium formed in high energy heavy ion collisions may modify some hadronic properties. In particular, if hadron masses are shifted in-medium, it was demonstrated that this could lead to back-to-back squeezed correlations (BBC) of particle-antiparticle pairs. Although well-established theoretically, the squeezed correlations have not yet been discovered experimentally. A method has been suggested for the empirical search of this effect, which was previously illustrated for phi-phi pairs. We apply here the formalism and the suggested method to the case of K^+ K^- pairs, since they may be easier to identify experimentally. The time distribution of the emission process plays a crucial role in the survival of the BBC's. We analyze the cases where the emission is supposed to occur suddenly or via a Lorentzian distribution, and compare with the case of a Levy distribution in time. Effects of squeezing on the correlation function of identical particles are also analyzed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑