Event generator tunes obtained from underlying event and multiparton scattering measurements
Abstract
New sets of parameters ("tunes") for the underlying-event (UE) modelling of the pythia8, pythia6 and herwig++ Monte Carlo event generators are constructed using different parton distribution functions. Combined fits to CMS UE proton-proton ([Formula: see text]) data at [Formula: see text] and to UE proton-antiproton ([Formula: see text]) data from the CDF experiment at lower [Formula: see text], are used to study the UE models and constrain their parameters, providing thereby improved predictions for proton-proton collisions at 13[Formula: see text]. In addition, it is investigated whether the values of the parameters obtained from fits to UE observables are consistent with the values determined from fitting observables sensitive to double-parton scattering processes. Finally, comparisons are presented of the UE tunes to "minimum bias" (MB) events, multijet, and Drell-Yan ([Formula: see text] lepton-antilepton+jets) observables at 7 and 8[Formula: see text], as well as predictions for MB and UE observables at 13[Formula: see text].
Funding
- National Science Foundation
- U.S. Department of Energy
- Alfred P. Sloan Foundation
- Alexander von Humboldt-Stiftung
- Compagnia di San Paolo
- Departamento Administrativo de Ciencia, Tecnología e Innovación (COLCIENCIAS)
- Türkiye Atom Enerjisi Kurumu
- CERN
- Thailand Center of Excellence in Physics
- Institute for the Promotion of Teaching Science and Technology
- Kanton Zürich
- European Commission
- National Research Foundation
- Deutsche Forschungsgemeinschaft
- Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
- Fundação de Amparo à Pesquisa do Estado de São Paulo
- National Natural Science Foundation of China
- Research Promotion Foundation
- Ministerstvo Školství, Mládeže a Tělovýchovy
- Fundacja na rzecz Nauki Polskiej
- Russian Foundation for Basic Research
- Eesti Teadusagentuur
- Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
- Academy of Finland
- Bundesministerium für Bildung und Forschung
- Chinese Academy of Sciences
- Austrian Science Fund
- Belgian Federal Science Policy Office
- Eidgenössische Technische Hochschule Zürich
- Agentschap voor Innovatie door Wetenschap en Technologie
- Consejo Nacional de Ciencia y Tecnología
- Ministero dell’Istruzione, dell’Università e della Ricerca
- Bundesministerium für Wissenschaft, Forschung und Wirtschaft
- Ministry of Education and Science of the Russian Federation
- General Secretariat for Research and Technology
- Ministry of Business, Innovation and Employment
- Conselho Nacional de Desenvolvimento Científico e Tecnológico
- Ministry of Science, ICT and Future Planning
- Joint Institute for Nuclear Research
- A.G. Leventis Foundation
- National Science and Technology Development Agency
- Universiti Malaya
- Narodowym Centrum Nauki
- Hrvatska Zaklada za Znanost
- Ministarstvo Prosvete, Nauke i Tehnološkog Razvoja
- 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
- Universidad Autónoma de San Luis Potosí
- School of Mathematics, Institute for Research in Fundamental Sciences
- Commissariat à l'Énergie Atomique et aux Énergies Alternatives
- Lietuvos Mokslų Akademija
- Pakistan Atomic Energy Commission
- Federal Agency of Atomic Energy of the Russian Federation
- Istituto Nazionale di Fisica Nucleare
- Board of the Swiss Federal Institutes of Technology
- Science and Technology Facilities Council
- Fundação para a Ciência e a Tecnologia
- Russian Academy of Sciences
- Fonds pour la Formation à la Recherche dans l’Industrie et dans l’Agriculture
- Secretaría de Estado de Investigación, Desarrollo e Innovación
- European Regional Development Fund
- Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional
- Institut National de Physique Nucléaire et de Physique des Particules
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