About: Dielectron Production in 12C+12C Collisions at 2A GeV with the HADES Spectrometer

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	The invariant-mass spectrum of e(+) e(-) pairs produced in C-12 + C-12 collisions at an incident energy of 2 GeV per nucleon has been measured for the first time. The measured pair production probabilities span over 5 orders of magnitude from the pi(0)-Dalitz to the rho/omega invariant-mass region. Dalitz decays of pi(0) and eta account for all the yield up to 0.15 GeV/c(2), but for only about 50% above this mass. A comparison with model calculations shows that the excess pair yield is likely due to baryon-resonance and vector-meson decays. Transport calculations based on vacuum spectral functions fail, however, to describe the entire mass region. The invariant-mass spectrum of e(+) e(-) pairs produced in C-12 + C-12 collisions at an incident energy of 2 GeV per nucleon has been measured for the first time. The measured pair production probabilities span over 5 orders of magnitude from the pi(0)-Dalitz to the rho/omega invariant-mass region. Dalitz decays of pi(0) and eta account for all the yield up to 0.15 GeV/c(2), but for only about 50% above this mass. A comparison with model calculations shows that the excess pair yield is likely due to baryon-resonance and vector-meson decays. Transport calculations based on vacuum spectral functions fail, however, to describe the entire mass region. (en) Výroba 12C+12csrážek 2A GeV při HADES spectrometru. (cs)
Title	Dielectron Production in 12C+12C Collisions at 2A GeV with the HADES Spectrometer Dielectron Production in 12C+12C Collisions at 2A GeV with the HADES Spectrometer (en) Produkce dielektronů ve srážkách 12C+12C při 2A GeV se spectrometrometrem HADES (cs)
skos:prefLabel	Dielectron Production in 12C+12C Collisions at 2A GeV with the HADES Spectrometer Dielectron Production in 12C+12C Collisions at 2A GeV with the HADES Spectrometer (en) Produkce dielektronů ve srážkách 12C+12C při 2A GeV se spectrometrometrem HADES (cs)
skos:notation	RIV/61389005:_____/07:00097742!RIV08-AV0-61389005
http://linked.open.../vavai/riv/strany	052302;052302
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(IAA1048304), P(LC07050), Z(AV0Z10480505)
http://linked.open...iv/cisloPeriodika	-
http://linked.open...vai/riv/dodaniDat	2008
http://linked.open...aciTvurceVysledku	Tlustý, Pavel Kugler, Andrej Wagner, Vladimír Pleskač, Radek
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav jaderné fyziky AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	417212
http://linked.open...ai/riv/idVysledku	RIV/61389005:_____/07:00097742
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	HADES spectrometer (en)
http://linked.open.../riv/klicoveSlovo	HADES spectrometer
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[B9F90282BF64]
http://linked.open...i/riv/nazevZdroje	Physical Review Letters
http://linked.open...in/vavai/riv/obor	BG
http://linked.open...ichTvurcuVysledku	4 (xsd:int)
http://linked.open...cetTvurcuVysledku	7 (xsd:int)
http://linked.open...vavai/riv/projekt	Center of experimental nuclear astrophysics and nuclear physics Dilepton production in ion-ion collisions and pion induced reactions
http://linked.open...UplatneniVysledku	2007
http://linked.open...v/svazekPeriodika	98
http://linked.open...iv/tvurceVysledku	Novotný, J. Tlustý, Pavel Wagner, Vladimír Kugler, Andrej Pospíšil, V. Pleskač, Radek Agakichiev, G.
http://linked.open...n/vavai/riv/zamer	Jaderná fyzika a příbuzné obory v základním, aplikovaném a interdisciplinárním výzkumu
issn	0031-9007
number of pages	1 (xsd:int)

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