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arXiv · 1903.10811

Measurement of exclusive Upsilon photoproduction in pPb collisions at $\sqrt{s_{NN}} = 5.02$ TeV with the CMS

Kousik Naskar
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Abstract

The exclusive photoproduction of $Υ$(1S), $Υ$(2S) and $Υ$(3S) mesons is studied in their leptonic ($μ^{+}μ^{-}$) decay modes, in ultraperipheral pPb collisions at $\sqrt{s_{NN}} = 5.02$ TeV. The data was recorded by the CMS experiment corresponding to an integrated luminosity of $32.6$ nb$^{-1}$. The differential cross-section for $Υ$(n) states (n=1,2,3), has been measured as a function of transverse momentum squared $p_{T}^{2}$, and rapidity $y$. The $Υ$(1S) photoproduction cross-section is extracted in the region $|y|<2.2$ as a function of the photon-proton centre-of-mass energies $W_{γp}$, in the range $91 <W_{γp}< 826$ GeV. The measurements are compared to theoretical predictions and to previous measurements.

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Kousik Naskar. 2019-03-26. Measurement of exclusive Upsilon photoproduction in pPb collisions at $\sqrt{s_{NN}} = 5.02$ TeV with the CMS. https://arxiv.org/abs/1903.10811

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