About: First measurement of proton-induced low-momentum dielectron radiation off cold nuclear matter

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About: First measurement of proton-induced low-momentum dielectron radiation off cold nuclear matter Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	We present data on dielectron emission in proton induced reactions on a Nb target at 3.5 GeV kinetic beam energy measured with HADES installed at GSI. The data represent the first high statistics measurement of proton-induced dielectron radiation from cold nuclear matter in a kinematic regime, where strong medium effects are expected. Combined with the good mass resolution of 2%, it is the first measurement sensitive to changes of the spectral functions of vector mesons, as predicted by models for hadrons at rest or small relative momenta. Comparing the e(+)e(-) invariant mass spectra to elementary p + p data, we observe for e(+)e(-) momenta P-ee < 0.8 GeV/c a strong modification of the shape of the spectrum, which we attribute to an additional rho-like contribution and a decrease of omega yield. These opposite trends are tentatively interpreted as a strong coupling of the rho meson to baryonic resonances and an absorption of the omega meson, which are two aspects of in-medium modification of vector mesons. We present data on dielectron emission in proton induced reactions on a Nb target at 3.5 GeV kinetic beam energy measured with HADES installed at GSI. The data represent the first high statistics measurement of proton-induced dielectron radiation from cold nuclear matter in a kinematic regime, where strong medium effects are expected. Combined with the good mass resolution of 2%, it is the first measurement sensitive to changes of the spectral functions of vector mesons, as predicted by models for hadrons at rest or small relative momenta. Comparing the e(+)e(-) invariant mass spectra to elementary p + p data, we observe for e(+)e(-) momenta P-ee < 0.8 GeV/c a strong modification of the shape of the spectrum, which we attribute to an additional rho-like contribution and a decrease of omega yield. These opposite trends are tentatively interpreted as a strong coupling of the rho meson to baryonic resonances and an absorption of the omega meson, which are two aspects of in-medium modification of vector mesons. (en)
Title	First measurement of proton-induced low-momentum dielectron radiation off cold nuclear matter First measurement of proton-induced low-momentum dielectron radiation off cold nuclear matter (en)
skos:prefLabel	First measurement of proton-induced low-momentum dielectron radiation off cold nuclear matter First measurement of proton-induced low-momentum dielectron radiation off cold nuclear matter (en)
skos:notation	RIV/61389005:_____/12:00384317!RIV13-AV0-61389005
http://linked.open...avai/riv/aktivita	P
http://linked.open...avai/riv/aktivity	P(IAA100480803), P(LC07050)
http://linked.open...iv/cisloPeriodika	4-5
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Krása, Antonín Tlustý, Pavel Křížek, Filip Kugler, Andrej Wagner, Vladimír Sobolev, Yuri
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	136670
http://linked.open...ai/riv/idVysledku	RIV/61389005:_____/12:00384317
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	vector-mesons; Rho-meson; collisions (en)
http://linked.open.../riv/klicoveSlovo	collisions Rho-meson vector-mesons
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[FCD5E9AEA30D]
http://linked.open...i/riv/nazevZdroje	Physics Letters. B
http://linked.open...in/vavai/riv/obor	BG
http://linked.open...ichTvurcuVysledku	6 (xsd:int)
http://linked.open...cetTvurcuVysledku	98 (xsd:int)
http://linked.open...vavai/riv/projekt	Center of experimental nuclear astrophysics and nuclear physics Dilepton production in ion-ion collisions studied using HADES setup
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	715
http://linked.open...iv/tvurceVysledku	Krása, Antonín Křížek, Filip Tlustý, Pavel Wagner, Vladimír Agakishiev, G. Balanda, A. Belyaev, A. Finocchiaro, P. Kugler, Andrej Rustamov, A. Sobolev, Yuri Guber, F. Karavicheva, T. Markert, J. Pechenova, O. Tarantola, A. Teilab, K. Michel, J. Strobele, H.
http://linked.open...ain/vavai/riv/wos	000308617500005
issn	0370-2693
number of pages	6 (xsd:int)
http://bibframe.org/vocab/doi	10.1016/j.physletb.2012.08.004

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