Squeezed K+K- correlations in high energy heavy ion collisions
Squeezed K+K- correlations in high energy heavy ion collisions
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DOI：
10.1103/physrevc.82.034905
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发表时间：
2010-06
影响因子：
3.1
通讯作者：
D. M. Dudek;S. Padula
中科院分区：
文献类型：
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作者：
D. M. Dudek;S. Padula
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，这种效果的经验搜索，这是以前说明了{phi}{phi}对。我们在这里应用的形式主义和建议的方法的情况下，K{sup +}K{sup -}对，因为它们可能更容易识别实验。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。
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{sup +}K{sup -} 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.