QCD介质中的射流：从颜色相干到退相干
Jets in QCD media: from color coherence to decoherence
摘要：
本文研究了在色单重态和色八重态中穿过稠密介质的夸克-反夸克天线的胶子软辐射。我们证明，在这两种情况下，多重散射导致作为介质密度的函数的天线辐射的逐渐退相干。特别地，在完全不透明介质的极限中，获得总退相干，即，夸克和反夸克在真空中作为独立的发射体辐射，因此失去了它们起源的记忆。我们评论可能的影响，在重离子碰撞喷流内观测。
英文摘要：
We investigate soft gluon radiation off a quark-antiquark antenna in both color singlet and octet configurations traversing a dense medium. We demonstrate that, in both cases, multiple scatterings lead to a gradual decoherence of the antenna radiation as a function of the medium density. In particular, in the limit of an completely opaque medium, total decoherence is obtained, i.e., the quark and the antiquark radiate as independent emitters in vacuum, thus losing memory of their origin. We comment on possible implications on intrajet observables in heavy-ion collisions.
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