4 research outputs found
On a possible explanation of the DLS puzzle
The enhancement in the dilepton spectrum observed in heavy-ion collisions for
invariant electron-positron masses in the range 0.15 GeV/c
0.6 GeV/c has recently been traced back to a corresponding enhancement in
collisions relative to collisions. Whereas the dilepton spectra in
the latter are understood quantitatively, theoretical descriptions fail to
describe the much higher dilepton rate in collisions, in particular
regarding the region 0.3 GeV/c at beam energies below 2 GeV.
We show that the missing strength can be attributed to the -channel
-production, which is dominated by the -channel
excitation and the recently found isoscalar dibaryonic resonance structure at
2.37 GeV