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The effect of the spectator charge on the charged pion spectra in peripheral ultrarelativistic heavy-ion collisions

A Szczurek·A Rybicki·A Z Gorski
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Abstract

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 $x_F$ dependence of the $π^+/π^-$ ratio, especially at low transverse momenta where a deep valley in the above ratio is predicted at $x_F \sim$ 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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A Szczurek, A Rybicki, A Z Gorski. 2007-01-19. The effect of the spectator charge on the charged pion spectra in peripheral ultrarelativistic heavy-ion collisions. https://doi.org/10.1088/0954-3899%2F34%2F8%2Fs105

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