New results on Coulomb effects in meson production in relativistic heavy ion collisions

Rybicki, A.; Szczurek, Antoni; Kłusek-Gawenda, Mariola

doi:10.1051/epjconf/20148105024

Cited by 3 publications

(3 citation statements)

References 9 publications

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“…In the present work, the attention is devoted to the properties and decay of the heavy remnants of the collision. Non-central collisions unambiguously lead to azimuthal asymmetries in the pion trajectory [1], which may be linked to the electromagnetic field generated by these fast-moving charged remnants. The influence of this field on charged pions was discussed in [2,3].…”

Section: Introductionmentioning

confidence: 99%

Dynamical evolution of spectator systems produced in ultrarelativistic heavy-ion collisions

et al. 2018

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In peripheral heavy-ion collisions at ultra-relativistic energies, usually only parts of the colliding nuclei effectively interact with each other. In the overlapping zone, a fireball or quark-gluon plasma is produced. The excitation energy of the heavy remnant can range from a few tens to several hundreds of MeV, depending on the impact parameter. The decay of these excited spectators is investigated in this work for the first time within a dynamical approach based on the multidimensional stochastic Langevin equation. The potential of this exploratory work to understand the connection between electromagnetic fields generated by the heavy spectators and measured pion distributions is discussed.

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Section: Introductionmentioning

confidence: 99%

Dynamical evolution of spectator systems produced in ultrarelativistic heavy-ion collisions

et al. 2018

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“…[11], (e), (f) electromagnetic component of π + and π − directed flow, extracted from STAR data [11] and compared to our simulation made assuming d E ≈ 3 fm. From: [8] (panels a,b), [12] (panel c), [13] (panels d,e,f).…”

Section: Introductionmentioning

confidence: 99%

“…Figure 2: (a) Ratio of charged pions emitted in peripheral Pb+Pb collisions at √ s N N = 17.3 GeV, (b) model simulation of this ratio as described in the text, (c) our Monte Carlo prediction for the (pure) electromagnetically-induced directed flow of positive pions, compared to the data from the WA98 experiment [10], (d) directed flow of charged pions in intermediate centrality Au+Au collisions[11], (e), (f) electromagnetic component of π + and π − directed flow, extracted from STAR data[11] and compared to our simulation made assuming d E ≈ 3 fm. From:[8] (panels a,b),[12] (panel c),[13] (panels d,e,f).…”

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Charge splitting of directed flow and charge-dependent effects in pion spectra in heavy ion collisions

Rybicki¹,

Szczurek²,

Kłusek-Gawenda³

et al. 2015

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The large and rapidly varying electric and magnetic fields induced by the spectator systems moving at ultrarelativistic velocities induce a charge splitting of directed flow, v1, of positive and negative pions in the final state of the heavy ion collision. The same effect results in a very sizeable distortion of charged pion spectra as well as ratios of charged pions (π + /π − ) emitted at high values of rapidity. Both phenomena are sensitive to the actual distance between the pion emission site and the spectator system. This distance dE appears to decrease with increasing rapidity of the pion, and comes below ∼1 fm for pions emitted close to beam rapidity. In this paper we discuss how these findings can shed new light on the space-time evolution of pion production as a function of rapidity, and on the longitudinal evolution of the system created in heavy ion collisions.

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Electromagnetic effects as a new source of information on the space-time evolution of heavy ion collisions

2017

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Abstract. We review our studies of spectator-induced electromagnetic (EM) effects on charged pion emission in ultrarelativistic heavy ion collisions. These effects are found to consist in the electromagnetic charge splitting of pion directed flow as well as very large distortions in spectra and ratios of produced charged particles. As it emerges from our analysis, they offer sensitivity to the actual distance, d E , between the pion formation zone at freeze-out and the spectator matter. As a result, this offers a new possibility of studying the space-time evolution of dense and hot matter created in the course of the collision. Having established that d E traces the longitudinal evolution of the system and therefore rapidly decreases as a function of pion rapidity, we investigate the latter finding in view of pion feed-over from intermediate resonance production. As a result, we obtain a first estimate of the pion decoupling time from EM effects which we compare to existing HBT data. We conclude that spectator-induced EM interactions can serve as a new tool for studying the space-time characteristics and longitudinal evolution of the system. We discuss the future perspectives for this activity on the basis of existing and future data from the NA61/SHINE experiment.

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New results on Coulomb effects in meson production in relativistic heavy ion collisions

Cited by 3 publications

References 9 publications

Dynamical evolution of spectator systems produced in ultrarelativistic heavy-ion collisions

Dynamical evolution of spectator systems produced in ultrarelativistic heavy-ion collisions

Charge splitting of directed flow and charge-dependent effects in pion spectra in heavy ion collisions

Electromagnetic effects as a new source of information on the space-time evolution of heavy ion collisions

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