Coherent and incoherent Upsilon production in ultraperipheral collisions at the Large Hadron Collider
Abstract
The exclusive photoproduction of (nS) states were calculated in ultra-peripheral collisions for coherent and incoherent process in PbPb at sNN= 5.5 TeV. Different dipole models were compared in the theoretical framework of light-cone color dipole formalism. Moreover, it was calculated the differential cross section for the Upsilon states and their total cross section for two intervals of rapidity: |y|≤ 4 4 and 2 y 4.5. A systematic study is done on the theoretical uncertainties associated to the production and predictions are presented for the first time for the incoherent cross section of the radially excited states.
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