Low mass dielectrons radiated off cold nuclear matter measured with HADES

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F14%3A00435739" target="_blank" >RIV/61389005:_____/14:00435739 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1051/epjconf/20146609011" target="_blank" >http://dx.doi.org/10.1051/epjconf/20146609011</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1051/epjconf/20146609011" target="_blank" >10.1051/epjconf/20146609011</a>

Result language
angličtina
Original language name
Low mass dielectrons radiated off cold nuclear matter measured with HADES
Original language description
The High Acceptance DiElectron Spectrometer HADES [1] is installed at the Helmholtzzentrum fur Schwerionenforschung (GSI) accelerator facility in Darmstadt. It investigates dielectron emission and strangeness production in the 1-3 AGeV regime. A recent experiment series focusses on medium-modifications of light vector mesons in cold nuclear matter. In two runs, p + p and p + Nb reactions were investigated at 3.5 GeV beam energy; about 9 . 10(9) events have been registered. In contrast to other experiments the high acceptance of the HADES allows for a detailed analysis of electron pairs with low momenta relative to nuclear matter, where modifications of the spectral functions of vector mesons are predicted to be most prominent. Comparing these low momentum electron pairs to the reference measurement in the elementary p + p reaction, we find in fact a strong modification of the spectral distribution in the whole vector meson region.
Czech name
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Czech description
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Project
<a href="/en/project/GA13-06759S" target="_blank" >GA13-06759S: Experimental Study of Hadrons in the Baryonic Medium</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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