Coherent photo-produced J/psi and dielectron yields in isobaric collisions
Coherent photo-produced J/psi and dielectron yields in isobaric collisions
复制标题
同量异位碰撞中相干光产生的 J/psi 和双电子产率
DOI：
10.1016/j.physletb.2018.12.041
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发表时间：
2019
影响因子：
4.4
通讯作者：
Yang S
中科院分区：
文献类型：
--
作者：
Zha W;Ruan L;Tang Z;Xu Z;Yang S
最近，星星和ALICE合作在周边强子A+ A碰撞中观察到J/π和e+ e −对产生在非常低的横动量下显著增强。异常的过度指向相干的光子-核和光子-光子相互作用的证据，在激烈的强子重离子碰撞，这是传统上只在超周边碰撞研究。在RHIC进行的同量异位素碰撞提供了一个独特的机会，以测试在强子重离子碰撞相干光子产品的存在。其思想是，在不同的碰撞系统中，由于它们的电荷和核密度分布的变化，相干光子产物的可能产生显着不同。在这封信中，我们专注于周边碰撞，并提供理论预测的相干生产J/π和双电子的等压碰撞。我们表明，预期的产量显着不同，以进行实验测试。
Recently, significant enhancements of J/ψ and e+ e− pair production at very low transverse momenta were observed by the STAR and ALICE collaborations in peripheral hadronic A+ A collisions. The anomalous excesses point to evidence of coherent photon–nucleus and photon–photon interactions in violent hadronic heavy-ion collisions, which were conventionally studied only in ultra-peripheral collisions. The isobaric collisions performed at RHIC provides a unique opportunity to test the existence of coherent photon products in hadronic heavy-ion collisions. The idea is that the possible production of coherent photon products is significantly different in different collision systems due to the variations in their charge and nuclear density distributions. In this letter, we focus on the peripheral collisions and provide theoretical predictions for coherent production of J/ψ and dielectron in isobaric collisions. We show that the expected yields differ significantly to perform the experimental test.