About: Direct photons at large p(T) : from RHIC to LHC

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://www.epj-conferences.org/articles/epjconf/abs/2014/03/epjconf_inpc2013_04006/epjconf_inpc2013_04006.html
Description	Using the color dipole formalism we study the production of direct photons in proton-nucleus and nucleus-nucleus collisions at energies corresponding to RHIC and LHC experiments. Prompt photons produced in a hard reaction are not accompanied with any final state interaction, either energy loss or absorption. Therefore, in the RHIC energy range besides small isotopic corrections one should not expect any nuclear effects at large p(T). However, data from the PHENIX experiment indicates a significant large-p(T) suppression in d + Au and central Au + Au collisions that cannot be accompanied by coherent phenomena. We demonstrate that such an unexpected result is subject to the energy sharing problem universally induced by multiple initial state interactions (ISI) at large p(T) and/or at forward rapidities. In the LHC kinematic region ISI corrections are irrelevant at mid rapidities but cause rather strong suppression at forward rapidities. We present for the first time predictions for expected nuclear effects at large pT in p + Pb and Pb + Pb collisions at different rapidities. We include and analyze also a contribution of coherent effects associated with gluon shadowing modifying nuclear effects predominantly at small and medium-high p(T) Using the color dipole formalism we study the production of direct photons in proton-nucleus and nucleus-nucleus collisions at energies corresponding to RHIC and LHC experiments. Prompt photons produced in a hard reaction are not accompanied with any final state interaction, either energy loss or absorption. Therefore, in the RHIC energy range besides small isotopic corrections one should not expect any nuclear effects at large p(T). However, data from the PHENIX experiment indicates a significant large-p(T) suppression in d + Au and central Au + Au collisions that cannot be accompanied by coherent phenomena. We demonstrate that such an unexpected result is subject to the energy sharing problem universally induced by multiple initial state interactions (ISI) at large p(T) and/or at forward rapidities. In the LHC kinematic region ISI corrections are irrelevant at mid rapidities but cause rather strong suppression at forward rapidities. We present for the first time predictions for expected nuclear effects at large pT in p + Pb and Pb + Pb collisions at different rapidities. We include and analyze also a contribution of coherent effects associated with gluon shadowing modifying nuclear effects predominantly at small and medium-high p(T) (en)
Title	Direct photons at large p(T) : from RHIC to LHC Direct photons at large p(T) : from RHIC to LHC (en)
skos:prefLabel	Direct photons at large p(T) : from RHIC to LHC Direct photons at large p(T) : from RHIC to LHC (en)
skos:notation	RIV/68407700:21340/14:00223584!RIV15-MSM-21340___
http://linked.open...avai/riv/aktivita	P S Z
http://linked.open...avai/riv/aktivity	P(GA13-20841S), P(LG13031), S, Z(MSM6840770039)
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Nemčík, Ján
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	České vysoké učení technické v Praze / Fakulta jaderná a fyzikálně inženýrská
http://linked.open...dnocenehoVysledku	11649
http://linked.open...ai/riv/idVysledku	RIV/68407700:21340/14:00223584
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	prompt photons; nuclear suppression; ISI corrections; gluon shadowing (en)
http://linked.open.../riv/klicoveSlovo	ISI corrections prompt photons gluon shadowing nuclear suppression
http://linked.open...ontrolniKodProRIV	[A6FC89BC990C]
http://linked.open...v/mistoKonaniAkce	Firenze
http://linked.open...i/riv/mistoVydani	Les Ulis Cedex A
http://linked.open...i/riv/nazevZdroje	EPJ Web of Conferences
http://linked.open...in/vavai/riv/obor	JB
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	2 (xsd:int)
http://linked.open...vavai/riv/projekt	Collaboration of the Czech Republic with CERN Studium jaderné hmoty v ultra-relativistických jaderných srážkách na urychlovači RHIC
http://linked.open...UplatneniVysledku	2014
http://linked.open...iv/tvurceVysledku	Nemčík, Ján Čepila, Jan
http://linked.open...vavai/riv/typAkce	WRD - Světová
http://linked.open...ain/vavai/riv/wos	000342463600006
http://linked.open.../riv/zahajeniAkce	2013-06-02 (xsd:date)
http://linked.open...n/vavai/riv/zamer	Matematické, počítačové a experimentální metody ve fyzice
issn	2101-6275
number of pages	4 (xsd:int)
http://bibframe.org/vocab/doi	10.1051/epjconf/20146604006
http://purl.org/ne...btex#hasPublisher	EDP Sciences
http://localhost/t...ganizacniJednotka	21340

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