Centrality Dependence of Deuteron Production in PbPb Collisions at 2.76 TeV via Hydrodynamics and Hadronic Afterburner [Centrality Dependence of Deuteron Production in Pb+Pb Collisions at 2.76 TeV via Hydrodynamics and Hadronic Afterburner]
Abstract
The deuteron binding energy is only 2.2 MeV. At the same time, its yield in Pb+Pb collisions at = 2.76 TeV corresponds to a thermal yield at the temperature around 155 MeV, which is too hot to keep deuterons bound. This puzzle is not completely resolved yet. In general, the mechanism of light nuclei production in ultra-high energy heavy ion collisions remains under debate. In a previous work we suggest a microscopic explanation of the deuteron production in central ultra-relativistic Pb+Pb collisions, the main mechanism being ppn $ pd reactions in the hadronic phase of the collision. We use a state-of-the-art hybrid approach, combining relativistic hydrodynamics for the hot and dense stage and hadronic transport for a later, more dilute stage. Deuteron rescattering in the hadronic stage is implemented explicitly, using its experimentally measured vacuum cross-sections. In these proceedings we extend our previous work to non-central collisions, keeping exactly the same methodology and parameters. We find that our approach leads to a good description of the measured deuteron transverse momentum spectra at centralities up to 40%, and underestimates the amount of deuterons at low transverse momentum at higher centralities. Nevertheless, the coalescence parameter B2, measured by ALICE collaboration, is reproduced well in our approach even for peripheral collisions.
- Authors:
-
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
- GSI Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany); Goethe Univ., Frankfurt am Main (Germany); Frankfurt Inst. for Advanced Studies, Frankfurt am Main (Germany)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- OSTI Identifier:
- 1503673
- Grant/Contract Number:
- AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Proceedings
- Additional Journal Information:
- Journal Volume: 10; Journal Issue: 1; Journal ID: ISSN 2504-3900
- Publisher:
- MDPI
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Heavy ion collisions; deuteron; LHC; relativistic hydrodynamics; hadronic transport
Citation Formats
Oliinychenko, Dmytro, Pang, Long -Gang, Elfner, Hannah, and Koch, Volker. Centrality Dependence of Deuteron Production in PbPb Collisions at 2.76 TeV via Hydrodynamics and Hadronic Afterburner [Centrality Dependence of Deuteron Production in Pb+Pb Collisions at 2.76 TeV via Hydrodynamics and Hadronic Afterburner]. United States: N. p., 2019.
Web. doi:10.3390/proceedings2019010006.
Oliinychenko, Dmytro, Pang, Long -Gang, Elfner, Hannah, & Koch, Volker. Centrality Dependence of Deuteron Production in PbPb Collisions at 2.76 TeV via Hydrodynamics and Hadronic Afterburner [Centrality Dependence of Deuteron Production in Pb+Pb Collisions at 2.76 TeV via Hydrodynamics and Hadronic Afterburner]. United States. https://doi.org/10.3390/proceedings2019010006
Oliinychenko, Dmytro, Pang, Long -Gang, Elfner, Hannah, and Koch, Volker. Wed .
"Centrality Dependence of Deuteron Production in PbPb Collisions at 2.76 TeV via Hydrodynamics and Hadronic Afterburner [Centrality Dependence of Deuteron Production in Pb+Pb Collisions at 2.76 TeV via Hydrodynamics and Hadronic Afterburner]". United States. https://doi.org/10.3390/proceedings2019010006. https://www.osti.gov/servlets/purl/1503673.
@article{osti_1503673,
title = {Centrality Dependence of Deuteron Production in PbPb Collisions at 2.76 TeV via Hydrodynamics and Hadronic Afterburner [Centrality Dependence of Deuteron Production in Pb+Pb Collisions at 2.76 TeV via Hydrodynamics and Hadronic Afterburner]},
author = {Oliinychenko, Dmytro and Pang, Long -Gang and Elfner, Hannah and Koch, Volker},
abstractNote = {The deuteron binding energy is only 2.2 MeV. At the same time, its yield in Pb+Pb collisions at sNN = 2.76 TeV corresponds to a thermal yield at the temperature around 155 MeV, which is too hot to keep deuterons bound. This puzzle is not completely resolved yet. In general, the mechanism of light nuclei production in ultra-high energy heavy ion collisions remains under debate. In a previous work we suggest a microscopic explanation of the deuteron production in central ultra-relativistic Pb+Pb collisions, the main mechanism being ppn $ pd reactions in the hadronic phase of the collision. We use a state-of-the-art hybrid approach, combining relativistic hydrodynamics for the hot and dense stage and hadronic transport for a later, more dilute stage. Deuteron rescattering in the hadronic stage is implemented explicitly, using its experimentally measured vacuum cross-sections. In these proceedings we extend our previous work to non-central collisions, keeping exactly the same methodology and parameters. We find that our approach leads to a good description of the measured deuteron transverse momentum spectra at centralities up to 40%, and underestimates the amount of deuterons at low transverse momentum at higher centralities. Nevertheless, the coalescence parameter B2, measured by ALICE collaboration, is reproduced well in our approach even for peripheral collisions.},
doi = {10.3390/proceedings2019010006},
journal = {Proceedings},
number = 1,
volume = 10,
place = {United States},
year = {Wed Apr 10 00:00:00 EDT 2019},
month = {Wed Apr 10 00:00:00 EDT 2019}
}
Search WorldCat to find libraries that may hold this journalFigures / Tables:
Figure 1: Coalescence parameter B2, measured by ALICE collaboration in Pb+Pb collisions at √sNN = 2.76 TeV (circles) is compared to the outcome of our hybrid (hydrodynamics + transport) approach calculation (lines) and to the same calculation without rescatterings, only with decays (dashed lines). Note that we do not applymore »
Works referencing / citing this record:
Overview of light nuclei production in relativistic heavy-ion collisions
text, January 2020
- Oliinychenko, D.
- arXiv