Creation of quark–gluon plasma droplets with three distinct geometries
Aidala, C. ; Oskarsson, Anders LU ; Silvermyr, David LU
and Zou, L.
(2019)
In Nature Physics
15(3).
p.214-220
- Abstract
- Experimental studies of the collisions of heavy nuclei at relativistic energies have established the properties of the quark–gluon plasma (QGP), a state of hot, dense nuclear matter in which quarks and gluons are not bound into hadrons1–4. In this state, matter behaves as a nearly inviscid fluid5 that efficiently translates initial spatial anisotropies into correlated momentum anisotropies among the particles produced, creating a common velocity field pattern known as collective flow. In recent years, comparable momentum anisotropies have been measured in small-system proton–proton (p+p) and proton–nucleus (p+A) collisions, despite expectations that the volume and lifetime of the medium produced would be too small to form a QGP. Here we... (More)
- Experimental studies of the collisions of heavy nuclei at relativistic energies have established the properties of the quark–gluon plasma (QGP), a state of hot, dense nuclear matter in which quarks and gluons are not bound into hadrons1–4. In this state, matter behaves as a nearly inviscid fluid5 that efficiently translates initial spatial anisotropies into correlated momentum anisotropies among the particles produced, creating a common velocity field pattern known as collective flow. In recent years, comparable momentum anisotropies have been measured in small-system proton–proton (p+p) and proton–nucleus (p+A) collisions, despite expectations that the volume and lifetime of the medium produced would be too small to form a QGP. Here we report on the observation of elliptic and triangular flow patterns of charged particles produced in proton–gold (p+Au), deuteron–gold (d+Au) and helium–gold (3He+Au) collisions at a nucleon–nucleon centre-of-mass energy sNN = 200 GeV. The unique combination of three distinct initial geometries and two flow patterns provides unprecedented model discrimination. Hydrodynamical models, which include the formation of a short-lived QGP droplet, provide the best simultaneous description of these measurements. © 2018, The Author(s), under exclusive licence to Springer Nature Limited. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/8017b71f-6acb-4810-86b3-6f5e019c6da2
- author
- Aidala, C.
; Oskarsson, Anders
LU
; Silvermyr, David
LU
and Zou, L.
- author collaboration
- organization
- publishing date
- 2019
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Nature Physics
- volume
- 15
- issue
- 3
- pages
- 214 - 220
- publisher
- Nature Publishing Group
- external identifiers
-
- scopus:85058183273
- ISSN
- 1745-2473
- DOI
- 10.1038/s41567-018-0360-0
- language
- English
- LU publication?
- yes
- id
- 8017b71f-6acb-4810-86b3-6f5e019c6da2
- date added to LUP
- 2019-01-09 15:12:52
- date last changed
- 2023-04-09 00:31:59
@article{8017b71f-6acb-4810-86b3-6f5e019c6da2,
abstract = {{Experimental studies of the collisions of heavy nuclei at relativistic energies have established the properties of the quark–gluon plasma (QGP), a state of hot, dense nuclear matter in which quarks and gluons are not bound into hadrons1–4. In this state, matter behaves as a nearly inviscid fluid5 that efficiently translates initial spatial anisotropies into correlated momentum anisotropies among the particles produced, creating a common velocity field pattern known as collective flow. In recent years, comparable momentum anisotropies have been measured in small-system proton–proton (p+p) and proton–nucleus (p+A) collisions, despite expectations that the volume and lifetime of the medium produced would be too small to form a QGP. Here we report on the observation of elliptic and triangular flow patterns of charged particles produced in proton–gold (p+Au), deuteron–gold (d+Au) and helium–gold (3He+Au) collisions at a nucleon–nucleon centre-of-mass energy sNN = 200 GeV. The unique combination of three distinct initial geometries and two flow patterns provides unprecedented model discrimination. Hydrodynamical models, which include the formation of a short-lived QGP droplet, provide the best simultaneous description of these measurements. © 2018, The Author(s), under exclusive licence to Springer Nature Limited.}},
author = {{Aidala, C. and Oskarsson, Anders and Silvermyr, David and Zou, L.}},
issn = {{1745-2473}},
language = {{eng}},
number = {{3}},
pages = {{214--220}},
publisher = {{Nature Publishing Group}},
series = {{Nature Physics}},
title = {{Creation of quark–gluon plasma droplets with three distinct geometries}},
url = {{http://dx.doi.org/10.1038/s41567-018-0360-0}},
doi = {{10.1038/s41567-018-0360-0}},
volume = {{15}},
year = {{2019}},
}