ALICE observes a low-transverse-momentum dielectron excess in peripheral Pb-Pb collisions at 5.02 TeV that is consistent with coherent photon-photon production.
Effect of magnetic fields on pairs of oppositely charged particles in ultrarelativistic heavy-ion collisions
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abstract
The initial strong magnetic field produced in high-energy nuclear collisions will distort the distribution of the relative angle between oppositely charged particles within a pair. In this paper, two experimental observables are examined to quantify such effects: one based on the framework for detecting the hyperon global polarization, and the other based on the balance function. We also discuss the optimization of the signal, as well as the expected magnitude ranges for the two observables.
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nucl-ex 1years
2019 1verdicts
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Dielectron production at low transverse momentum in Pb-Pb collisions at $ \sqrt{s_{\mathrm{NN}}}=5.02 $ TeV with ALICE
ALICE observes a low-transverse-momentum dielectron excess in peripheral Pb-Pb collisions at 5.02 TeV that is consistent with coherent photon-photon production.