Beam Energy and Centrality Dependence of Direct-Photon Emission from Ultrarelativistic Heavy-Ion Collisions
(2019) In Physical Review Letters 123(2).- 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. © 2019 authors. Published by the American Physical Society.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/706ed61f-7215-47b5-849d-9bea331d46c1
- author
- author collaboration
- organization
- publishing date
- 2019-07-10
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Heavy ions, Photons, Au+Au collisions, Collision energies, Collision systems, Large Hadron Collider, Multiplicative factors, Relativistic Heavy Ion Collider, Scaling behavior, Ultrarelativistic heavy ion collision, Colliding beam accelerators
- in
- Physical Review Letters
- volume
- 123
- issue
- 2
- article number
- 022301
- publisher
- American Physical Society
- external identifiers
-
- scopus:85069921283
- pmid:31386493
- ISSN
- 1079-7114
- DOI
- 10.1103/PhysRevLett.123.022301
- language
- English
- LU publication?
- yes
- id
- 706ed61f-7215-47b5-849d-9bea331d46c1
- alternative location
- https://www.scopus.com/inward/record.uri?eid=2-s2.0-85069921283&doi=10.1103%2fPhysRevLett.123.022301&partnerID=40&md5=8bb199c6b6c3e1722b1bc416abb104d3
- date added to LUP
- 2019-08-30 10:31:06
- date last changed
- 2023-04-09 22:20:08
@article{706ed61f-7215-47b5-849d-9bea331d46c1, 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. © 2019 authors. Published by the American Physical Society.}}, author = {{Adare, A. and Christiansen, Peter and Gustafsson, Hans-Åke and Haslum, Eva and Nystrand, Joakim and Oskarsson, Anders and Otterlund, Ingvar and Rosendahl, Sarah and Silvermyr, David and Stenlund, Evert and Tydesjö, Henrik and Zou, L.}}, issn = {{1079-7114}}, keywords = {{Heavy ions; Photons; Au+Au collisions; Collision energies; Collision systems; Large Hadron Collider; Multiplicative factors; Relativistic Heavy Ion Collider; Scaling behavior; Ultrarelativistic heavy ion collision; Colliding beam accelerators}}, language = {{eng}}, month = {{07}}, number = {{2}}, publisher = {{American Physical Society}}, series = {{Physical Review Letters}}, title = {{Beam Energy and Centrality Dependence of Direct-Photon Emission from Ultrarelativistic Heavy-Ion Collisions}}, url = {{http://dx.doi.org/10.1103/PhysRevLett.123.022301}}, doi = {{10.1103/PhysRevLett.123.022301}}, volume = {{123}}, year = {{2019}}, }