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Importance of initial and final state effects for azimuthal correlations in p+Pb collisions
- We study the influence and interplay of initial state and final state effects in the dynamics of small systems, focusing on azimuthal correlations at different multiplicities. To this end we introduce a new model, matching the classical Yang-Mills dynamics of pre-equilibrium gluon fields (IP-GLASMA) to a perturbative QCD based parton cascade for the final state evolution (BAMPS) on an event-by-event basis. Depending on multiplicity of the event, we see transverse momentum dependent signatures of the initial, but also the final state in azimuthal correlation observables, such as v2 {2PC}(pT). In low-multiplicity events, initial state correlations dominate for transverse momenta pT > 2 GeV, whereas in high-multiplicity events and at low momenta final state interactions dominate and initial state correlations strongly affect v2 {2PC}(pT) for pT > 2 GeV as well as the pT integrated v2 {2PC}. Nearly half of the final pT integrated v2 {2PC} is contributed by the initial state in low-multiplicity events, whereas in high-multiplicity the share is much less. Based on Ref. [M. Greif, C. Greiner, B. Schenke, S. Schlichting, Z. Xu, Phys. Rev. D96 (9) (2017) 091504], we are now able to carry out a systematic multiplicity scan, probing the dynamics on the border of initial state dominated to final state dominated – but not yet hydrodynamic regime.
Author: | Moritz GreifORCiDGND, Carsten GreinerGND, Björn Peter SchenkeORCiDGND, Sören SchlichtingORCiDGND, Zhe Xu |
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URN: | urn:nbn:de:hebis:30:3-776150 |
DOI: | https://doi.org/10.1016/j.nuclphysa.2018.10.055 |
ISSN: | 0375-9474 |
Parent Title (English): | Nuclear Physics A |
Publisher: | Elsevier |
Place of publication: | Amsterdam |
Document Type: | Article |
Language: | English |
Date of Publication (online): | 2019/01/22 |
Date of first Publication: | 2019/01/22 |
Publishing Institution: | Universitätsbibliothek Johann Christian Senckenberg |
Contributing Corporation: | International Conference on Ultrarelativistic Nucleus-Nucleus Collisions (27. : 2018 : Venedig) |
Release Date: | 2023/10/27 |
Tag: | Final state; IPGLASMA; Initial state; Parton cascade BAMPS; Small systems |
Volume: | 982 |
Page Number: | 4 |
First Page: | 491 |
Last Page: | 494 |
HeBIS-PPN: | 517297914 |
Institutes: | Physik |
Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
Sammlungen: | Universitätspublikationen |
Licence (German): | Creative Commons - CC BY-NC-ND - Namensnennung - Nicht kommerziell - Keine Bearbeitungen 4.0 International |