- th / 0 70 10 56 v 1 1 9 Ja n 20 07 The effect of the spectator charge on the charged pion spectra in peripheral ultrarelativistic heavy - ion collisions
نویسنده
چکیده
We estimate the electromagnetic effect of the spectator charge on the momentum spectra of charged pions produced in peripheral Pb+Pb collisions at SPS energies. We find a large effect which results in strongly varying structures in the xF dependence of the π/π ratio, especially at low transverse momenta where a deep valley in the above ratio is predicted at xF ∼ 0.15 – 0.20. The effect depends on initial conditions. Thus, it provides new information on the space and time evolution of the non-perturbative pion creation process.
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