@article{42d07431c681466c8f6e0129153de25a,
title = "Beam Energy and Centrality Dependence of Direct-Photon Emission from Ultrarelativistic Heavy-Ion Collisions",
abstract = "The PHENIX collaboration presents first measurements of low-momentum (0.41 GeV/c) direct-photon yield dNγdir/dη is a smooth function of dNch/dη and can be well described as proportional to (dNch/dη)α with α≈1.25. This scaling behavior holds for a wide range of beam energies at the Relativistic Heavy Ion Collider and the Large Hadron Collider, for centrality selected samples, as well as for different A+A collision systems. At a given beam energy, the scaling also holds for high pT (>5 GeV/c), but when results from different collision energies are compared, an additional sNN-dependent multiplicative factor is needed to describe the integrated-direct-photon yield.",
author = "\{(PHENIX Collaboration)\} and A. Adare and S. Afanasiev and C. Aidala and Ajitanand, \{N. N.\} and Y. Akiba and R. Akimoto and H. Al-Bataineh and J. Alexander and M. Alfred and A. Al-Jamel and H. Al-Ta'Ani and A. Angerami and K. Aoki and N. Apadula and L. Aphecetche and Y. Aramaki and R. Armendariz and Aronson, \{S. H.\} and J. Asai and H. Asano and Aschenauer, \{E. C.\} and Atomssa, \{E. T.\} and R. Averbeck and Awes, \{T. C.\} and B. Azmoun and V. Babintsev and A. Bagoly and M. Bai and G. Baksay and L. Baksay and A. Baldisseri and B. Bannier and Barish, \{K. N.\} and Barnes, \{P. D.\} and B. Bassalleck and Basye, \{A. T.\} and S. Bathe and S. Batsouli and V. Baublis and F. Bauer and C. Baumann and S. Baumgart and A. Bazilevsky and S. Belikov and R. Belmont and R. Bennett and A. Berdnikov and \{Grosse Perdekamp\}, M. and Peng, \{J. C.\} and A. Sickles",
note = "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 (U.S.A), Ministry of Education, Culture, Sports, Science, and Technology and the Japan Society for the Promotion of Science (Japan), Conselho Nacional de Desenvolvimento Cient\textbackslash{}u00EDfico e Tecnol\textbackslash{}u00F3gico and Funda\textbackslash{}u00E7\textbackslash{}u00E3o de Amparo \textbackslash{}u00E0 Pesquisa do Estado de S\textbackslash{}u00E3o Paulo (Brazil), Natural Science Foundation of China (People\textbackslash{}u2019s 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 \textbackslash{}u00E0 l\textbackslash{}u2019\textbackslash{}u00C9nergie Atomique, and Institut National de Physique Nucl\textbackslash{}u00E9aire et de Physique des Particules (France), Bundesministerium f\textbackslash{}u00FCr Bildung und Forschung, Deutscher Akademischer Austausch Dienst, and Alexander von Humboldt Stiftung (Germany), J. Bolyai Research Scholarship, EFOP, the New National Excellence Program (\textbackslash{}u00DANKP), NKFIH, and OTKA (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 U.S. Civilian Research and Development Foundation for the Independent States of the Former Soviet Union, the Hungarian American Enterprise Scholarship Fund, the US-Hungarian Fulbright Foundation, and the US-Israel Binational Science Foundation.",
year = "2019",
month = jul,
day = "10",
doi = "10.1103/PhysRevLett.123.022301",
language = "English (US)",
volume = "123",
journal = "Physical review letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "2",
}