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Origin of the low-mass electron pair excess in light nucleus-nucleus collisions
- 1.
SYSNO ASEP 0355992 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Origin of the low-mass electron pair excess in light nucleus-nucleus collisions Author(s) Agakichiev, G. (DE)
Balanda, A. (PL)
Belver, D. (ES)
Belyaev, A. V. (RU)
Blanco, A. (PT)
Böhmer, M. (DE)
Boyard, J. L. (FR)
Braun-Munzinger, P. (DE)
Cabanelas, P. (ES)
Castro, E. (ES)
Chernenko, S. (RU)
Christ, T. (DE)
Destefanis, M. (DE)
Díaz, J. (ES)
Dohrmann, F. (DE)
Dybczak, A. (PL)
Fabbietti, L. (RU)
Fateev, O.V. (RU)
Finocchiaro, P. (IT)
Fonte, P. (PT)
Friese, J. (DE)
Frohlich, I. (DE)
Galatyuk, T. (DE)
Garzón, J.A. (ES)
Gernhäuser, R. (DE)
Gil, A. (ES)
Gilardi, C. (DE)
Gobel, K. (DE)
Golubeva, M. (RU)
Gonzalez-Diaz, D. (DE)
Hennino, G.T. (RU)
Holzmann, R. (DE)
Iori, I. (IT)
Ivashkin, A. (RU)
Jurkovic, M. (DE)
Kämpfer, B. (DE)
Karavicheva, T. (RU)
Kirschner, D. (DE)
Koenig, I. (DE)
Koenig, W. (DE)
Kolb, B.W. (DE)
Kotte, R. (DE)
Křížek, Filip (UJF-V) RID, ORCID, SAI
Kruecken, R. (DE)
Kuhn, W. (DE)
Kugler, Andrej (UJF-V) RID, ORCID, SAI
Kurepin, A. (RU)
Lang, S. (DE)
Lange, J.S. (DE)
Lapidus, K. (RU)
Liu, T. (PT)
Lopes, L. (PT)
Lorenz, M. (DE)
Maier, L. (DE)
Mangiarotti, A. (PT)
Markert, J. (DE)
Metag, V. (DE)
Michalska, B. (PL)
Michel, J. (DE)
Moriniére, E. (FR)
Mousa, J. (CY)
Muntz, C. (DE)
Naumann, L. (DE)
Otwinowski, J. (PL)
Pachmayer, Y.C. (DE)
Palka, M. (DE)
Parpottas, Y. (CY)
Pechenov, V. (DE)
Pechenova, O. (DE)
Pietraszko, J. (DE)
Przygoda, W. (PL)
Ramstein, B. (FR)
Reshetin, A. (RU)
Rustamov, A. (DE)
Sadovsky, A. (RU)
Salabura, P. (PL)
Schmah, A. (DE)
Schwab, E. (DE)
Sobolev, Yuri, G. (UJF-V) ORCID
Spataro, S. (DE)
Spruck, B. (DE)
Strobele, H. (DE)
Stroth, J. (DE)
Sturm, C. (DE)
Sudol, M. (FR)
Tarantola, A. (DE)
Teilab, K. (DE)
Tlustý, Pavel (UJF-V) ORCID, SAI
Traxler, M. (DE)
Trebacz, R. (PL)
Tsertos, H. (CY)
Wagner, Vladimír (UJF-V) RID, ORCID, SAI
Weber, M. (DE)
Wisniowski, M. (PL)
Wojcik, T. (PL)
Wüstenfeld, J. (DE)
Yurevich, S. (DE)
Zanevsky, V.V. (RU)
Zhou, P. (DE)Source Title Physics Letters. B. - : Elsevier - ISSN 0370-2693
Roč. 690, č. 2 (2010), s. 118-122Number of pages 5 s. Language eng - English Country NL - Netherlands Keywords Virtual bremsstrahlung ; Dileptons ; Nucleon-nucleon collisions Subject RIV BG - Nuclear, Atomic and Molecular Physics, Colliders R&D Projects LC07050 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LA316 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) IAA100480803 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z10480505 - UJF-V (2005-2011) UT WOS 000279513800003 DOI 10.1016/j.physletb.2010.05.010 Annotation We report measurements of electron pair production in elementary p + p and d + p reactions at 1.25 GeV/mu with the HADES spectrometer. For the first time, the electron pairs were reconstructed for n + p reactions by detecting the proton spectator from the deuteron breakup. We find that the yield of electron pairs with invariant mass Me+e- > 0.15 GeV/c(2) is about an order of magnitude larger in n + p reactions as compared to p + p. A comparison to model calculations demonstrates that the production mechanism is not sufficiently described yet. The electron pair spectra measured in C + C reactions are compatible with a superposition of elementary n + p and p + p collisions, leaving little room for additional electron pair sources in such light collision systems Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2011
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