Multi-differential tests on Υ(nS) and ψ(2S)/J/ψ suppression in high-multiplicity pp collisions rule out standard hadronic and string models in favor of an early globally correlated partonic medium.
Is bottomonium suppression in proton-nucleus and nucleus-nucleus collisions at LHC energies due to the same effects?
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abstract
We show that we can reproduce all the features of bottomonium suppression in both proton-nucleus and nucleus-nucleus collisions at LHC energies in a comover-interaction picture. For each collisions system, we use the measured {\it relative} suppression of the excited $\Upsilon$(2S) and $\Upsilon$(3S) states to $\Upsilon$(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 nonpertubative 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 {\it 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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hep-ph 2years
2026 2verdicts
UNVERDICTED 2representative citing papers
Multi-differential constraint analysis of Υ(nS) suppression in high-multiplicity pp and pPb collisions favors an early, globally correlated, topology-sensitive mechanism over local-density or total-multiplicity control.
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Sequential Y(nS) suppression in high-multiplicity pp collisions: the experimental case for an early, globally correlated medium
Multi-differential tests on Υ(nS) and ψ(2S)/J/ψ suppression in high-multiplicity pp collisions rule out standard hadronic and string models in favor of an early globally correlated partonic medium.
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A multi-differential constraint map for quarkonium suppression mechanisms in high-multiplicity pp and pPb collisions
Multi-differential constraint analysis of Υ(nS) suppression in high-multiplicity pp and pPb collisions favors an early, globally correlated, topology-sensitive mechanism over local-density or total-multiplicity control.