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Medium-induced optical effects for prompt photons
Nuclear Theory · Submitted 6 Aug 2014
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim The results indicate that they could be small but have phenomenologically non-trivial consequences.
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The paper's own sentences, arranged. Each label is drawn from a closed vocabulary; the number beside it is the probability the classifier gave that label. Numbers in the tables are the authors', checked by code. No sentence in this record was written by a model.
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The abstract, sentence by sentence
Electromagnetic aspects of a QCD matter have been a hot topic in recent years. High-energy heavy-ion experiments revealed that flow harmonics of direct photons are not explained by most hydrodynamic models. In this work I discuss possible effects of refraction by the hot medium since it can work as a lens which converts its geometrical anisotropy into momentum anisotropy of photons. Then elliptic flow and higher-order harmonics of prompt photons are estimated numerically. The results indicate that they could be small but have phenomenologically non-trivial consequences.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | Electromagnetic aspects of a QCD matter have been a hot topic in recent years. | background 1.00 | 0.03 | 0.01 | asserted 0.99 |
| s1 | High-energy heavy-ion experiments revealed that flow harmonics of direct photons are not explained by most hydrodynamic models. | background 0.60 | 0.05 | 0.03 | asserted 1.00 |
| s2 | In this work I discuss possible effects of refraction by the hot medium since it can work as a lens which converts its geometrical anisotropy into momentum anisotropy of photons. | contribution 0.88 | 0.32 | 0.10 | hedged possibility 0.94 |
| s3 | Then elliptic flow and higher-order harmonics of prompt photons are estimated numerically. | method 0.92 | 0.91 | 0.06 | asserted 0.97 |
| s4 | The results indicate that they could be small but have phenomenologically non-trivial consequences. | interpretation 0.55 | 0.89 | 0.80 | hedged possibility 0.99 |
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The paper
Original abstract
Electromagnetic aspects of a QCD matter have been a hot topic in recent years. High-energy heavy-ion experiments revealed that flow harmonics of direct photons are not explained by most hydrodynamic models. In this work I discuss possible effects of refraction by the hot medium since it can work as a lens which converts its geometrical anisotropy into momentum anisotropy of photons. Then elliptic flow and higher-order harmonics of prompt photons are estimated numerically. The results indicate that they could be small but have phenomenologically non-trivial consequences.
Human review
How the literature uses it
5 arXiv papers cite this in 6 sentences
Papers citing it · 2 sentences without a confident label
Uses its method or tool 1 paper
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The numerical code is from Ref. [ref] .
Effective distributions of quasi-particles for thermal photons · Hydrodynamic flow · 1.00
Cites it as background 3 papers
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Other approaches include, for instance, introduction of medium refraction [ref] , Tsallis statistics [ref] , deceleration processes of colliding nuclei [ref] , relaxation time dependences [ref] , holographic photon emission rates [ref] , and anisotropic hydrodynamics [ref] .
Direct Photons in Hydrodynamic Modeling of Relativistic Nuclear Collisions · Photon puzzle · 0.86
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Effects of the strong magnetic field, as well as the medium effects studied in, e.g., Refs. [ref] , will be important for the optics in the heavy-ion collisions.
Photon and dilepton spectra from nonlinear QED effects in supercritical magnetic fields induced by heavy-ion collisions · Introduction · 0.89
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It would also be important to investigate the effects of other mechanisms, e.g., Ref. [ref] for the comprehensive understanding of photon physics in heavy-ion collisions.
Elliptic flow of thermal photons in chemically non-equilibrated QCD medium · Conclusion and outlook · 0.94
What it cites · 1 sentence without a confident label
Uses the method or tool of 1 paper
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The space-time profile of the bulk medium or “QGP lens" is given by the (2+1)-dimensional inviscid hydrodynamic model [ref] with boost-invariance for the Au-Au collisions at $√(s_NN) = 200$ GeV.
Thermal photon $v_2$ with slow quark chemical equilibration · Numerical analyses · 0.99
Uses data or values from 1 paper
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The latest RHIC experimental data of the photon $p_T$ spectra [ref] pose a constraint $ω_p < 0.5$ GeV on the model because no clear effect of absorption is found for the momentum above $0.5$ GeV.
1405.3940 · Optics in Heavy-Ion Collisions · 0.90
Cites as background 6 papers
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There are continuing debates on the mechanics behind the excess of direct photon $v_2^γ$ [ref] .
Anisotropic flow of thermal photons as a quark-gluon plasma viscometer · Introduction · 0.92
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There are continuing debates on the mechanics behind the excess of direct photon $v_2^γ$ [ref] .
Centrality dependence of the direct photon yield and elliptic flow in heavy-ion collisions at sqrt(s)=200 GeV · Introduction · 0.92
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There are continuing debates on the mechanics behind the excess of direct photon $v_2^γ$ [ref] .
Triangular flow of thermal photons from an event-by-event hydrodynamic model for 2.76A TeV Pb+Pb collisions at LHC · Introduction · 0.92
Discussion
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