Origin of the low-mass electron pair excess in light nucleus–nucleus collisions

Agakichiev, G.; Bałanda, A.; Belver, D.; Belyaev, A.; Blanco, A.; Böhmer, M.; Boyard, J. L.; Braun‐Munzinger, P.; Cabanelas, P.; Castro, E.; Chernenko, S.; Christ, T.; Destefanis, M.; Díaz, Julio Pérez; Dohrmann, F.; Dybczak, A.; Fabbietti, L.; Fateev, O.; Finocchiaro, P.; Fonte, P.; Friese, J.; Fröhlich, I.; Galatyuk, T.; Garzón, J. A.; Gernhäuser, R.; Gil, A.; Gilardi, C.; Göbel, K.; Golubeva, M.; González-Díaz, D.; Guber, F.; Hennino, T.; Holzmann, R.; Iori, I.; Ivashkin, A.; Jurković, M.; Kämpfer, B.; Karavicheva, T.; Kirschner, D.; Köenig, I.; Koenig, W.; Kolb, B. W.; Kötte, R.; Křížek, F.; Krücken, R.; Kühn, W.; Куглер, А.; Kurepin, A.; Lang, S.; Lange, J. S.; Lapidus, K.; Liu, T.; Lopes, L.; Lorenz, M.; Maier, L.; Mangiarotti, A.; Markert, J.; Metag, V.; Michalska, B.; Michel, J.; Morinière, E.; Mousa, J.; Müntz, C.; Naumann, L.; Otwinowski, J.; Pachmayer, Y.; Pałka, M.; Parpottas, Y.; Pechenov, V.; Pechenova, O.; Pietraszko, J.; Przygoda, W.; Ramstein, B.; Reshetin, A.; Rustamov, A.; Sadovsky, A.; Salabura, P.; Schmah, A.; Schwab, E.; Sobolev, Yu. G.; Spataro, S.; Spruck, B.; Ströbele, H.; Stroth, J.; Sturm, C.; Sudol, M.; Tarantola, A.; Teilab, K.; Tlustý, P.; Traxler, M.; Trębacz, R.; Tsertos, H.; Wagner, V.; Weber, M.; Wiśniowski, M.; Wójcik, Tomasz; Wüstenfeld, J.; Yurevich, S.; Zanevsky, Y.; Zhou, Pei

doi:10.1016/j.physletb.2010.05.010

Cited by 102 publications

(113 citation statements)

References 32 publications

Supporting

Mentioning

101

Contrasting

Order By: Relevance

“…The 1.25 GeV data, taken from Ref. [7], are adjusted for the present, more restrictive detector acceptance (i.e., stronger magnetic field and explicit lepton momentum cut of 0.1 GeV/c); the 3.5 GeV data are taken from Ref. [8].…”

Section: Fig 2 (Color Online)mentioning

confidence: 99%

“…2 with inclusive data from other HADES p + p runs done at 1.25 [7] and 3.5 GeV [8] bombarding energy, respectively. While the 3.5 GeV data were recorded in the same detector acceptance as the present 2.2 GeV data, the 1.25 GeV data were adjusted for differences in the magnetic field strengths and analysis cuts used.…”

Section: Fig 2 (Color Online)mentioning

confidence: 99%

“…The high acceptance dielectron spectrometer (HADES) experiment pursues a comprehensive program of dielectron emission studies in N + N [7,8], p + A [9], and A + A collisions [10][11][12]. Inclusive e + e − production in p + p and p + d reactions has formerly been studied in the range of [1][2][3][4][5] GeV by the dilepton spectrometer (DLS) experiment at the Bevalac facility [13] and has more recently been studied by the HADES experiment at 1.25 [7] and 3.5 GeV [8].…”

Section: Introductionmentioning

confidence: 99%

“…Inclusive e + e − production in p + p and p + d reactions has formerly been studied in the range of [1][2][3][4][5] GeV by the dilepton spectrometer (DLS) experiment at the Bevalac facility [13] and has more recently been studied by the HADES experiment at 1.25 [7] and 3.5 GeV [8]. In particular, the comparison of the latter data sets with various model calculations demonstrated a need for improved theoretical descriptions.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Inclusive dielectron production in proton-proton collisions at 2.2 GeV beam energy

Agakishiev¹,

Álvarez‐Pol²,

Bałanda³

et al. 2012

Phys. Rev. C

Self Cite

View full text Add to dashboard Cite

Data on inclusive dielectron production are presented for the reaction p + p at 2.2 GeV measured with the high acceptance dielectron spectrometer (HADES). Our results supplemented data obtained earlier in this bombarding energy regime with the dilepton spectrometer (DLS) and HADES. The comparison with the 2.09 GeV DLS data is discussed. The reconstructed e + e − pair distributions are confronted with simulations, revealing an excess yield at invariant masses around 0.5 GeV/c 2 . Inclusive cross sections of neutral pion and η production are obtained.

show abstract

Section: Fig 2 (Color Online)mentioning

confidence: 99%

Section: Fig 2 (Color Online)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Inclusive dielectron production in proton-proton collisions at 2.2 GeV beam energy

Agakishiev¹,

Álvarez‐Pol²,

Bałanda³

et al. 2012

Phys. Rev. C

Self Cite

View full text Add to dashboard Cite

show abstract

“…In fact, η meson production in heavy-ion collisions has been studied extensively both theoretically and experimentally, especially by the TAPS and HADES Collaborations, see, e.g., refs. [66][67][68][69][70][71][72][73][74][75]. Moreover, as pointed out earlier [66,67], because of the hidden strangeness (the ss component), η mesons experience weaker final state interactions compared to pions.…”

Section: Introductionmentioning

confidence: 99%

Effects of nuclear symmetry energy on η meson production and its rare decay to the dark U-boson in heavy-ion reactions

Yong

2013

Physics Letters B

View full text Add to dashboard Cite

Using a relativistic transport model ART1.0, we explore effects of nuclear symmetry energy on η meson production and its rare decay to the dark U-boson in heavy-ion reactions from 0.2 to 10 GeV/nucleon available at several current and future facilities. The yield of η mesons at sub-threshold energies is found to be very sensitive to the density dependence of nuclear symmetry energy. Above a beam energy of about 5 GeV/nucleon in Au+Au reactions, the sensitivity to symmetry energy disappears. Using the branching ratio of the rare η decay (η → γU ) available in the literature, we estimate the maximum cross section for the U-boson production in the energy range considered, providing a useful reference for future U-boson search using heavy-ion reactions.PACS numbers: 21.65.Mn, 21.65.Ef, 95.35.+d

show abstract

FAIR – Cosmic matter in the laboratory

Stoecker

Sturm

2014

Astron Nachr

Self Cite

View full text Add to dashboard Cite

To explore cosmic matter in the laboratory -this fascinating research prospect becomes available in 2018 at the Facility for Antiproton and Ion Research, FAIR. The new facility is being constructed within the next five years adjacent to the existing accelerator complex of the GSI Helmholtz Centre for Heavy Ion Research at Darmstadt/Germany, expanding the research goals and technical possibilities substantially. This includes new insights into the dynamics of supernovae depending on the properties of short-lived neutron-rich nuclei which will be investigated with intense rare isotope beams. New insights will be provided into the interior of stars by exploring dense plasmas with intense heavy-ion beams combined with a high-performance laser -or into neutron star cores by probing the highest baryon densities in relativistic nucleusnucleus collisions at unprecedented collision rates. To the latter, the properties of hadrons play an important part which will be systematically studied by high precision hadron spectroscopy with antiproton beams at unmatched intensities. The worldwide unique accelerator and experimental facilities of FAIR will open the way for a broad spectrum of unprecedented fore-front research supplying a large variety of experiments in hadron, nuclear, atomic and plasma physics as well as biomedical and material science which will be briefly described in this article.

show abstract

Origin of the low-mass electron pair excess in light nucleus–nucleus collisions

Cited by 102 publications

References 32 publications

Inclusive dielectron production in proton-proton collisions at 2.2 GeV beam energy

Inclusive dielectron production in proton-proton collisions at 2.2 GeV beam energy

Effects of nuclear symmetry energy on η meson production and its rare decay to the dark U-boson in heavy-ion reactions

FAIR – Cosmic matter in the laboratory

Contact Info

Product

Resources

About