PHENIX measurements of low momentum direct photon radiation

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F19%3A10407873" target="_blank" >RIV/00216208:11320/19:10407873 - isvavai.cz</a>
Alternative codes found
RIV/68407700:21340/19:00332011
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=toTm5jvRre" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=toTm5jvRre</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.nuclphysa.2018.09.069" target="_blank" >10.1016/j.nuclphysa.2018.09.069</a>

Result language
angličtina
Original language name
PHENIX measurements of low momentum direct photon radiation
Original language description
The versatility of RHIC allowed the PHENIX collaboration to measure low momentum direct photons from small systems, such as p+p, p+A, d+Au at root s(NN) = 200 GeV as well as from large A+A systems, such as Au+Au and Cu+Cu at 200 GeV and Au+Au at 62.4 GeV and 39 GeV. In these measurements PHENIX has discovered a large excess over the scaled p+p yield of direct photons in A+A collisions, and a non-zero excess over the scaled p+p yield in central p+A collisions. Another PHENIX discovery is that at low-p(T) the integrated yield of direct photons, dN(gamma)/dy, from large systems follows a universal scaling as a function of the charged-particle multiplicity, (dN(ch)/d eta)(alpha), with alpha = 1.25. The observed scaling properties of direct photons from these systems show that the photon production yield increases faster than the charged-particle multiplicity.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10304 - Nuclear physics

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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