Measurement of the multiplicity dependence of Υ production ratios in pp collisions at $$ \sqrt{s} $$ = 13 TeV

A bstract The Υ (2 S ) and Υ (3 S ) production cross-sections are measured relative to that of the Υ (1 S ) meson, as a function of charged-particle multiplicity in proton-proton collisions at a centre-of-mass energy of 13 TeV. The measurement uses data collected by the LHCb experiment in 2018 corresponding to an integrated luminosity of 2 fb − 1 . Both the Υ (2 S )-to- Υ (1 S ) and Υ (3 S )-to- Υ (1 S ) cross-section ratios are found to decrease significantly as a function of event multiplicity, with the Υ (3 S )-to- Υ (1 S ) ratio showing a steeper decline towards high multiplicity. This hierarchy is qualitatively consistent with the comover model predictions, indicating that final-state interactions play an important role in bottomonia production in high-multiplicity events.

Publication Details

Journal
Apollo (University of Cambridge)
Published
2025-02-10
Primary Topic
Advanced Electron Microscopy Techniques and Applications
Type
article
Field-Weighted Citation Impact
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article

Measurement of the multiplicity dependence of Υ production ratios in pp collisions at $$ \sqrt{s} $$ = 13 TeV

Apollo (University of Cambridge)
Advanced Electron Microscopy Techniques and Applications
article

Measurement of the multiplicity dependence of Υ production ratios in pp collisions at $$ \sqrt{s} $$ = 13 TeV

article en

Abstract

A bstract The Υ (2 S ) and Υ (3 S ) production cross-sections are measured relative to that of the Υ (1 S ) meson, as a function of charged-particle multiplicity in proton-proton collisions at a centre-of-mass energy of 13 TeV. The measurement uses data collected by the LHCb experiment in 2018 corresponding to an integrated luminosity of 2 fb − 1 . Both the Υ (2 S )-to- Υ (1 S ) and Υ (3 S )-to- Υ (1 S ) cross-section ratios are found to decrease significantly as a function of event multiplicity, with the Υ (3 S )-to- Υ (1 S ) ratio showing a steeper decline towards high multiplicity. This hierarchy is qualitatively consistent with the comover model predictions, indicating that final-state interactions play an important role in bottomonia production in high-multiplicity events.

Apollo (University of Cambridge)
National Science Foundation, U.S. Department of Energy, Alexander von Humboldt-Stiftung, CERN, UK Research and Innovation, Ministerul Cercetării, Inovării şi Digitalizării, Institutul National de Cercetare-Dezvoltare pentru Fizica si Inginerie Nucleara 'Horia Hulubei', Leverhulme Trust, European Commission, Deutsche Forschungsgemeinschaft, Agence Nationale de la Recherche, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, National Natural Science Foundation of China, Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Bundesministerium für Bildung und Forschung, Nederlandse Organisatie voor Wetenschappelijk Onderzoek, Generalitat Valenciana, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Max-Planck-Gesellschaft, Ministerstwo Edukacji i Nauki, Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro, National Academy of Sciences of Ukraine, Centre National de la Recherche Scientifique, Financiadora de Estudos e Projetos, Région Auvergne-Rhône-Alpes, CAS Center for Excellence in Particle Physics, Australian Research Data Commons, Science and Technology Facilities Council, Deutsches Elektronen-Synchrotron, Agencia Estatal de Investigación, Fundamental Research Funds for the Central Universities, Institut National de Physique Nucléaire et de Physique des Particules, Nuclear Physics, H2020 Marie Skłodowska-Curie Actions
Openalex Percentile: Top 58%
Advanced Electron Microscopy Techniques and Applications
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