Toward unbiased flow measurements in LHC proton-proton collisions

Two-particle angular correlations of charged-particle pairs are studied in pp collisions at √s = 13 TeV with four different Monte-Carlo event generators. Correlation functions are constructed with relative azimuthal angle ∆φ and relative pseudorapidity distance ∆η between hadrons such as π, K, p and...

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Main Author: Kallio, Teemu
Other Authors: Matemaattis-luonnontieteellinen tiedekunta, Faculty of Sciences, Fysiikan laitos, Department of Physics, Jyväskylän yliopisto, University of Jyväskylä
Format: Master's thesis
Language:eng
Published: 2024
Subjects:
Online Access: https://jyx.jyu.fi/handle/123456789/99156
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author Kallio, Teemu
author2 Matemaattis-luonnontieteellinen tiedekunta Faculty of Sciences Fysiikan laitos Department of Physics Jyväskylän yliopisto University of Jyväskylä
author_facet Kallio, Teemu Matemaattis-luonnontieteellinen tiedekunta Faculty of Sciences Fysiikan laitos Department of Physics Jyväskylän yliopisto University of Jyväskylä Kallio, Teemu Matemaattis-luonnontieteellinen tiedekunta Faculty of Sciences Fysiikan laitos Department of Physics Jyväskylän yliopisto University of Jyväskylä
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description Two-particle angular correlations of charged-particle pairs are studied in pp collisions at √s = 13 TeV with four different Monte-Carlo event generators. Correlation functions are constructed with relative azimuthal angle ∆φ and relative pseudorapidity distance ∆η between hadrons such as π, K, p and Λ particle pairs in multiple ∆η intervals. Using the low-multiplicity template fit method, enhanced jet yields in high-multiplicity events with respect to low-multiplicity events are subtracted. Due to a kinematic bias from jets and the difference in how event generators implement jet and flow components, subtraction of non-flow bias results in small systems. With a multiphase transport (AMPT) string melting model mass ordering of the extracted flow coefficients at low-pT and particle type grouping at high-pT ranges was observed. However, these characteristics are found to be different from results observed in large systems.
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spellingShingle Kallio, Teemu Toward unbiased flow measurements in LHC proton-proton collisions event generator low-multiplicity template fit method flow measurement ALICE LHC Fysiikka Physics 4021 törmäykset hiukkasfysiikka mittaus hiukkaskiihdyttimet tapahtumat collision particle physics measurement particle accelerators events
title Toward unbiased flow measurements in LHC proton-proton collisions
title_full Toward unbiased flow measurements in LHC proton-proton collisions
title_fullStr Toward unbiased flow measurements in LHC proton-proton collisions Toward unbiased flow measurements in LHC proton-proton collisions
title_full_unstemmed Toward unbiased flow measurements in LHC proton-proton collisions Toward unbiased flow measurements in LHC proton-proton collisions
title_short Toward unbiased flow measurements in LHC proton-proton collisions
title_sort toward unbiased flow measurements in lhc proton proton collisions
title_txtP Toward unbiased flow measurements in LHC proton-proton collisions
topic event generator low-multiplicity template fit method flow measurement ALICE LHC Fysiikka Physics 4021 törmäykset hiukkasfysiikka mittaus hiukkaskiihdyttimet tapahtumat collision particle physics measurement particle accelerators events
topic_facet 4021 ALICE Fysiikka LHC Physics collision event generator events flow measurement hiukkasfysiikka hiukkaskiihdyttimet low-multiplicity template fit method measurement mittaus particle accelerators particle physics tapahtumat törmäykset
url https://jyx.jyu.fi/handle/123456789/99156 http://www.urn.fi/URN:NBN:fi:jyu-202412207960
work_keys_str_mv AT kallioteemu towardunbiasedflowmeasurementsinlhcprotonprotoncollisions