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Dielectron Production in $^{12} C+^{12}C$ Collisions at 1 GeV/u and the Solution to the DLS Puzzle

Abstract : The production of e+e- pairs in $^{12}C+^{12}C$ collisions at 1 GeV/u was investigated with the HADES experiment at GSI, Darmstadt. In the invariant-mass region $ 0.15\: GeV/c^{2} \leq M_{ee} \leq 0.5\: GeV/c^{2}$ the measured pair yield shows a strong excess above the contribution expected from hadron decays after freeze-out. The data are in good agreement with the results of the former DLS experiment for the same system and energy.
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http://hal.in2p3.fr/in2p3-00276559
Contributor : Suzanne Robert <>
Submitted on : Wednesday, April 30, 2008 - 11:25:30 AM
Last modification on : Wednesday, September 16, 2020 - 4:08:13 PM

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  • HAL Id : in2p3-00276559, version 1
  • ARXIV : 0804.3993

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Y. C. Pachmayer, G. Agakishiev, C. Agodi, A. Balanda, G. Bellia, et al.. Dielectron Production in $^{12} C+^{12}C$ Collisions at 1 GeV/u and the Solution to the DLS Puzzle. Quark Matter 2008, Feb 2008, Jaipur, India. ⟨in2p3-00276559⟩

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