First measurement of quarkonium polarization in nuclear collisions at the LHC

The ALICE collaboration, S. Acharya, D. Adamova, D. J. Kim, F. Krizek, J. E. Parkkila, J. Rak, Heidi Maria Rytkönen, Sami Räsänen, Oskari Antti Matti Saarimäki, M. Slupecki, W. H. Trzaska, Zhipeng Zhou

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Sammanfattning

The study of (anti-)deuteron production in pp collisions has proven to be a powerful tool to investigate the formation mechanism of loosely bound states in high-energy hadronic collisions. In this paper the production of (anti-)deuterons is studied as a function of the charged particle multiplicity in inelastic pp collisions at root s = 13 TeV using the ALICE experiment. Thanks to the large number of accumulated minimum bias events, it has been possible to measure (anti-)deuteron production in pp collisions up to the same charged particle multiplicity (dN(ch)/d eta similar to 26) as measured in p-Pb collisions at similar centre-of-mass energies. Within the uncertainties, the deuteron yield in pp collisions resembles the one in p-Pb interactions, suggesting a common formation mechanism behind the production of light nuclei in hadronic interactions. In this context the measurements are compared with the expectations of coalescence and statistical hadronisation models (SHM).

Originalspråkengelska
Artikelnummer136146
TidskriftPhysics Letters B
Volym815
Antal sidor13
ISSN0370-2693
DOI
StatusPublicerad - 10 apr 2021
MoE-publikationstypA1 Tidskriftsartikel-refererad

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