@article{849ce02eba4b4fdaaf95bb5322b6929a,
title = "Creation of quark–gluon plasma droplets with three distinct geometries",
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.",
author = "{PHENIX Collaboration} and C. Aidala and Y. Akiba and M. Alfred and V. Andrieux and K. Aoki and N. Apadula and H. Asano and C. Ayuso and B. Azmoun and V. Babintsev and A. Bagoly and Bandara, {N. S.} and Barish, {K. N.} and S. Bathe and A. Bazilevsky and M. Beaumier and R. Belmont and A. Berdnikov and Y. Berdnikov and Blau, {D. S.} and M. Boer and Bok, {J. S.} and Brooks, {M. L.} and J. Bryslawskyj and V. Bumazhnov and C. Butler and S. Campbell and Roman, {V. Canoa} and R. Cervantes and Chi, {C. Y.} and M. Chiu and Choi, {I. J.} and Choi, {J. B.} and Z. Citron and M. Connors and N. Cronin and M. Csan{\'a}d and T. Cs{\"o}rg{\H o} and Danley, {T. W.} and Daugherity, {M. S.} and G. David and K. DeBlasio and K. Dehmelt and A. Denisov and A. Deshpande and Desmond, {E. J.} and A. Dion and D. Dixit and B. Hong and Yoo, {J. H.}",
note = "Funding Information: We thank the staff of the Collider-Accelerator and Physics Departments at Brookhaven National Laboratory and the staff of the other PHENIX participating institutions for their vital contributions. We acknowledge support from the Office of Nuclear Physics in the Office of Science of the Department of Energy, the National Science Foundation, Abilene Christian University Research Council, Research Foundation of SUNY, and Dean of the College of Arts and Sciences, Vanderbilt University (USA), Ministry of Education, Culture, Sports, Science, and Technology and the Japan Society for the Promotion of Science (Japan), Conselho Nacional de Desenvolvimento Cientfico e Tecnol{\'o}gico and Funda{\c c}{\~a}o de Amparo {\`a} Pesquisa do Estado de S{\~a}o Paulo (Brazil), Natural Science Foundation of China (People{\textquoteright}s Republic of China), Croatian Science Foundation and Ministry of Science and Education (Croatia), Ministry of Education, Youth and Sports (Czech Republic), Centre National de la Recherche Scientifique, Commissariat {\`a} l'{\'E}nergie Atomique, and Institut National de Physique Nucl{\'e}aire et de Physique des Particules (France), Bundesministerium f{\"u}r Bildung und Forschung, Deutscher Akademischer Austausch Dienst, and Alexander von Humboldt Stiftung (Germany), NKFIH, EFOP, the New National Excellence Program ({\'U}NKP) and the J. Bolyai Research Scholarships (Hungary), Department of Atomic Energy and Department of Science and Technology (India), Israel Science Foundation (Israel), Basic Science Research Program through NRF of the Ministry of Education (Korea), Physics Department, Lahore University of Management Sciences (Pakistan), Ministry of Education and Science, Russian Academy of Sciences, Federal Agency of Atomic Energy (Russia), VR and Wallenberg Foundation (Sweden), the US Civilian Research and Development Foundation for the Independent States of the Former Soviet Union, the Hungarian American Enterprise Scholarship Fund, and the US–Israel Binational Science Foundation. Publisher Copyright: {\textcopyright} 2018, The Author(s), under exclusive licence to Springer Nature Limited.",
year = "2019",
month = mar,
day = "1",
doi = "10.1038/s41567-018-0360-0",
language = "English",
volume = "15",
pages = "214--220",
journal = "Nature Physics",
issn = "1745-2473",
publisher = "Nature Publishing Group",
number = "3",
}