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arXiv 1301.4095hep-phnucl-th
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在CERN大型强子对撞机可用能量下超外围Pb+Pb和p+Pb碰撞中J/Psi的产生

J/Psi production in ultraperipheral Pb+Pb and p+Pb collisions at energies available at the CERN Large Hadron Collider

T. Lappi, H. Mäntysaari

摘要:

我们使用两种不同的偶极子模型拟合HERA数据,计算了超周边核-核和质子-核碰撞中非相干和相干衍射J/Psi产生的截面。我们得到了一个合理的好的描述,可用ALICE数据的相干J/J的生产,并提出我们的预测的非相干截面。我们还发现,虽然归一化的截面依赖于偶极子模型和矢量介子波函数使用相当强烈,快度的依赖性是非常好的约束。

英文摘要:

We compute cross sections for incoherent and coherent diffractive J/Psi production in ultraperipheral nucleus-nucleus and proton-nucleus collisions using two different dipole models fitted to HERA data. We obtain a reasonably good description of the available ALICE data for coherent J/Ψproduction and present our prediction for the incoherent cross section. We also find that while the normalization of the cross section depends quite strongly on the dipole model and vector meson wave function used, the rapidity dependence is very well constrained.

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