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

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

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dc.contributor.author Agakishiev, G. pl
dc.contributor.author Bałanda, Andrzej [SAP11003402] pl
dc.contributor.author Belver, D. pl
dc.contributor.author Belyaev, A. pl
dc.contributor.author Berger-Chen, J. C. pl
dc.contributor.author Blanco, A. pl
dc.contributor.author Böhmer, M. pl
dc.contributor.author Boyard, J. L. pl
dc.contributor.author Cabanelas, P. pl
dc.contributor.author Chernenko, S. pl
dc.contributor.author Dybczak, Adrian [USOS8059] pl
dc.contributor.author Epple, E. pl
dc.contributor.author Fabbietti, L. pl
dc.contributor.author Fateev, O. pl
dc.contributor.author Finocchiaro, P. pl
dc.contributor.author Fonte, P. pl
dc.contributor.author Friese, J. pl
dc.contributor.author Fröhlich, I. pl
dc.contributor.author Galatyuk, T. pl
dc.contributor.author Garzón, J. A. pl
dc.contributor.author Gernhäuser, R. pl
dc.contributor.author Göbel, K. pl
dc.contributor.author Golubeva, M. pl
dc.contributor.author González-Díaz, D. pl
dc.contributor.author Guber, F. pl
dc.contributor.author Gumberidze, M. pl
dc.contributor.author Heinz, T. pl
dc.contributor.author Hennino, T. pl
dc.contributor.author Holzmann, R. pl
dc.contributor.author Ierusalimov, A. pl
dc.contributor.author Iori, I. pl
dc.contributor.author Ivashkin, A. pl
dc.contributor.author Jurkovic, M. pl
dc.contributor.author Kämpfer, B. pl
dc.contributor.author Karavicheva, T. pl
dc.contributor.author Koenig, I. pl
dc.contributor.author Koenig, W. pl
dc.contributor.author Kolb, B. W. pl
dc.contributor.author Kornakov, G. pl
dc.contributor.author Kotte, R. pl
dc.contributor.author Krása, A. pl
dc.contributor.author Krizek, F. pl
dc.contributor.author Krücken, R. pl
dc.contributor.author Kuc, Hubert [USOS122173] pl
dc.contributor.author Kühn, W. pl
dc.contributor.author Kugler, A. pl
dc.contributor.author Kurepin, A. pl
dc.contributor.author Ladygin, V. pl
dc.contributor.author Lalik, R. pl
dc.contributor.author Lang, S. pl
dc.contributor.author Lapidus, K. pl
dc.contributor.author Lebedev, A. pl
dc.contributor.author Liu, T. pl
dc.contributor.author Lopes, L. pl
dc.contributor.author Lorenz, M. pl
dc.contributor.author Maier, L. pl
dc.contributor.author Mangiarotti, A. pl
dc.contributor.author Markert, J. pl
dc.contributor.author Metag, V. pl
dc.contributor.author Michalska, Beata [USOS8215] pl
dc.contributor.author Michel, J. pl
dc.contributor.author Mishra, D. pl
dc.contributor.author Müntz, C. pl
dc.contributor.author Naumann, L. pl
dc.contributor.author Pachmayer, Y. C. pl
dc.contributor.author Pałka, Marek [SAP14007322] pl
dc.contributor.author Parpottas, Y. pl
dc.contributor.author Pechenov, V. pl
dc.contributor.author Pechenova, O. pl
dc.contributor.author Pietraszko, J. pl
dc.contributor.author Przygoda, Witold [SAP11016049] pl
dc.contributor.author Ramstein, B. pl
dc.contributor.author Reshetin, A. pl
dc.contributor.author Rustamov, A. pl
dc.contributor.author Sadovsky, A. pl
dc.contributor.author Salabura, Piotr [SAP11011883] pl
dc.contributor.author Schmah, A. pl
dc.contributor.author Schwab, E. pl
dc.contributor.author Siebenson, J. pl
dc.contributor.author Sobolev, Yu. G. pl
dc.contributor.author Spataro, S. pl
dc.contributor.author Spruck, B. pl
dc.contributor.author Ströbele, H. pl
dc.contributor.author Stroth, J. pl
dc.contributor.author Sturm, C. pl
dc.contributor.author Tarantola, A. pl
dc.contributor.author Teilab, K. pl
dc.contributor.author Tlusty, P. pl
dc.contributor.author Traxler, M. pl
dc.contributor.author Trębacz, Radosław pl
dc.contributor.author Tsertos, H. pl
dc.contributor.author Vasiliev, T. pl
dc.contributor.author Wagner, V. pl
dc.contributor.author Weber, M. pl
dc.contributor.author Wendisch, C. pl
dc.contributor.author Wüstenfeld, J. pl
dc.contributor.author Yurevich, S. pl
dc.contributor.author Zanevsky, Y. pl
dc.date.accessioned 2016-05-18T13:31:09Z
dc.date.available 2016-05-18T13:31:09Z
dc.date.issued 2012 pl
dc.identifier.issn 0370-2693 pl
dc.identifier.uri http://ruj.uj.edu.pl/xmlui/handle/item/26422
dc.language eng pl
dc.rights Udzielam licencji. Uznanie autorstwa 3.0 *
dc.rights.uri http://creativecommons.org/licenses/by/3.0/legalcode *
dc.title First measurement of proton-induced low-momentum dielectron radiation off cold nuclear matter pl
dc.type JournalArticle pl
dc.description.physical 304-309 pl
dc.abstract.en 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. pl
dc.description.volume 715 pl
dc.description.number 4-5 pl
dc.description.publication 0,3 pl
dc.identifier.doi 10.1016/j.physletb.2012.08.004 pl
dc.identifier.eissn 1873-2445 pl
dc.title.journal Physics Letters. B pl
dc.language.container eng pl
dc.affiliation Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiego pl
dc.subtype Article pl
dc.rights.original CC-BY; otwarte czasopismo; ostateczna wersja wydawcy; w momencie opublikowania; 0; pl
dc.identifier.project ROD UJ / P pl
.pointsMNiSW [2012 A]: 40


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Udzielam licencji. Uznanie autorstwa 3.0 Except where otherwise noted, this item's license is described as Udzielam licencji. Uznanie autorstwa 3.0