Importance of mesons in light-by-light scattering in ultraperipheral lead-lead collisions at the LHC
Institute of Nuclear Physics Polish Academy of Sciences, PL-31-342 Krakow, Poland
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Published online: 1 February 2019
Possibility of PbPb→PbPbγγ measurement at smaller (< 5 GeV) diphoton invariant mass will be presented. Analysis focuses only on ultraperipheral heavy-ion collisions. This estimate shows that the γγ → γγ collisions can be measured at the LHC by ALICE and LHCb experiments for diphoton invariant mass > 2 GeV. Predictions for the γγ → η, γγ → η′ resonance scattering shows that these resonances can be measured with rather good statistics. A possible observation of peaks related to intermediate η, η′(958), ηc(1S), ηc(2S), χc0(1P) mesons will be presented too. Attempts of reduction of background which comes from dipion production will be considered.
© The Authors, published by EDP Sciences, 2019
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