Is bottomonium suppression in proton-nucleus and nucleus-nucleus collisions at LHC energies due to the same effects?

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URI: http://hdl.handle.net/10347/21271
E-ISSN: 1029-8479
DOI: 10.1007/JHEP03(2019)063

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2018

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Springer
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Abstract

We show that we can reproduce all the features of the bottomonium suppression in both proton-nucleus and nucleus-nucleus collisions at LHC energies in a comover-interaction picture. For each collision system, we use the measured relative suppression of the excited ϒ(2S) and ϒ(3S) states to ϒ(1S) by ATLAS and CMS to parametrise the scattering cross sections of all S- and P -wave bottomonia with the comoving particles created during the collisions. In addition to a single nonperturbative parameter, these cross sections depend on the momentum distribution of these comovers which we found to be the same for proton-nucleus and nucleus-nucleus collisions as well as for partonic and hadronic comovers. Moreover, we can also reproduce the absolute suppresion rates measured by ALICE, ATLAS, CMS and LHCb when the nuclear modifications of the parton densities are taken into account

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Heavy Ion Phenomenology| Phenomenological Models

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Ferreiro, E.G., Lansberg, J.P. Is bottomonium suppression in proton-nucleus and nucleus-nucleus collisions at LHC energies due to the same effects?. J. High Energ. Phys. 2018, 94 (2018). https://doi.org/10.1007/JHEP10(2018)094

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E.G.F. thanks Laboratoire LePrince-Ringuet de l’Ecole Polytechnique and l’Université Paris-Saclay for their hospitality and financial support in the framework of Jean D’Alembert fellowship during the completion of this work, and to the Ministerio de Ciencia e Innovacion of Spain under project FPA2014-58293-C2-1-P and Unidad de Excelencia María de Maetzu under project MDM-2016-0692 for financial support. The work of J.P.L. is supported in part by the French CNRS via the grant PICS-07920 “Excitonium”

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© The Authors 2018. Open Access. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited

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Instituto Galego de Física de Altas Enerxías (IGFAE)