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Study of cold and hot nuclear matter effects on jets with direct photon triggered correlations from PHENIX
Nuclear Experiment · Submitted 14 Apr 2017
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim Together these results can give a view of jet modification going from small to large system size.
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The abstract, sentence by sentence
Direct photons, being colorless objects, provide an unmodified control particle that can be used in conjunction with jets to probe the quark-gluon plasma. To leading order the direct photon momentum balances the momentum of opposing jets and can therefore provide a clean handle on the jet energy. Therefore, angular correlations with direct photons provide a mechanism to study the fragmentation of the opposing jet without performing jet reconstruction. Jet fragmentation modification has been measured previously in PHENIX in central Au+Au collisions. Recent RHIC runs offer the potential to study these observables in heavy ion collisions with greater statistics and over different collision systems including asymmetric collision geometries. In this talk we present results of isolated direct photon-triggered correlations in d+Au collisions and discuss the constraints of cold nuclear matter effects on the fragmentation functions. We also present the latest results with higher statistics on direct photon-triggered correlations in Au+Au collisions including differential measurements of fragmentation function modification. Finally, we present the status of the centrality and collision species dependence of these observables, including comparisons to related dihadron correlations. Together these results can give a view of jet modification going from small to large system size.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | Direct photons, being colorless objects, provide an unmodified control particle that can be used in conjunction with jets to probe the quark-gluon plasma. | background 1.00 | 0.05 | 0.03 | asserted 1.00 |
| s1 | To leading order the direct photon momentum balances the momentum of opposing jets and can therefore provide a clean handle on the jet energy. | background 0.95 | 0.07 | 0.04 | asserted 0.97 |
| s2 | Therefore, angular correlations with direct photons provide a mechanism to study the fragmentation of the opposing jet without performing jet reconstruction. | background 0.51 | 0.10 | 0.06 | asserted 0.96 |
| s3 | Jet fragmentation modification has been measured previously in PHENIX in central Au+Au collisions. | background 1.00 | 0.17 | 0.03 | asserted 1.00 |
| s4 | Recent RHIC runs offer the potential to study these observables in heavy ion collisions with greater statistics and over different collision systems including asymmetric collision geometries. | background 0.78 | 0.07 | 0.03 | hedged possibility 0.99 |
| s5 | In this talk we present results of isolated direct photon-triggered correlations in d+Au collisions and discuss the constraints of cold nuclear matter effects on the fragmentation functions. | contribution 0.99 | 0.91 | 0.10 | asserted 0.95 |
| s6 | We also present the latest results with higher statistics on direct photon-triggered correlations in Au+Au collisions including differential measurements of fragmentation function modification. | contribution 0.76 | 0.93 | 0.10 | asserted 1.00 |
| s7 | Finally, we present the status of the centrality and collision species dependence of these observables, including comparisons to related dihadron correlations. | contribution 0.88 | 0.86 | 0.08 | asserted 0.90 |
| s8 | Together these results can give a view of jet modification going from small to large system size. | interpretation 1.00 | 0.38 | 0.32 | hedged possibility 0.97 |
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The paper
Original abstract
Direct photons, being colorless objects, provide an unmodified control particle that can be used in conjunction with jets to probe the quark-gluon plasma. To leading order the direct photon momentum balances the momentum of opposing jets and can therefore provide a clean handle on the jet energy. Therefore, angular correlations with direct photons provide a mechanism to study the fragmentation of the opposing jet without performing jet reconstruction. Jet fragmentation modification has been measured previously in PHENIX in central Au+Au collisions. Recent RHIC runs offer the potential to study these observables in heavy ion collisions with greater statistics and over different collision systems including asymmetric collision geometries. In this talk we present results of isolated direct photon-triggered correlations in d+Au collisions and discuss the constraints of cold nuclear matter effects on the fragmentation functions. We also present the latest results with higher statistics on direct photon-triggered correlations in Au+Au collisions including differential measurements of fragmentation function modification. Finally, we present the status of the centrality and collision species dependence of these observables, including comparisons to related dihadron correlations. Together these results can give a view of jet modification going from small to large system size.
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1 arXiv paper cite this in 2 sentences
Papers citing it · 1 sentence without a confident label
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We are tempted to compare the $200$ GeV results from Fig. [ref] with the preliminary result in Refs. [ref] that shows up to about $0.1$ GeV$^2$ broader widths in $pA$ that in $pp$, for $x_E < 0.4$, albeit for $π^0 h^±$ production.
Isolated photon-hadron production in high energy $pp$ and $pA$ collisions at RHIC and LHC · Out-of-plane transverse momentum distributions · 0.98
What it cites · 2 sentences without a confident label
Compares with 1 paper
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This dependence is shown in three $$ ranges in the right panel of Fig. [ref], with theory curves from Refs. [ref] .
Distorting the Hump-backed Plateau of Jets with Dense QCD Matter · Results in d+Au and Au+Au · 0.80
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