Soft photon registration at Nuclotron
Elena Kokoulina, E. Ardashev, V. Golovkin, S. Golovnya, S. Gorokhov,, A. Kholodenko, A. Kiryakov, I. Lobanov, M. Polkovnikov, V. Ronzhin, V., Ryadovikov, Yu. Tsyupa, A. Vorobiev, V. Avdeichikov, V. Balandin, V. Dunin,, O. Gavrishchuk, A. Isupov, N. Kuzmin, V. Nikitin
TL;DR
This paper reports initial findings of soft photon production in nucleus-nucleus collisions at 3.5 GeV per nucleon, showing an excess yield below 50 MeV energy consistent with prior experiments and challenging existing theories.
Contribution
First experimental measurement of soft photon yield at Nuclotron, confirming excess production below 50 MeV energy in nucleus-nucleus interactions.
Findings
Confirmed excess soft photon yield below 50 MeV
Results agree with previous high-energy experiments
Spectra differ from some theoretical predictions
Abstract
First results of a soft photon yield in nucleus-nuclear interactions at 3.5 GeV per nucleon are presented. These photons have been registered at Nuclotron (LHEP, JINR) by an electromagnetic calorimeter built in the SVD Collaboration. The obtained spectra confirm the excess yield in the energy region less than 50 MeV in comparison with theoretical predictions and agree with previous experiments at high-energy interactions.
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Taxonomy
TopicsHigh-Energy Particle Collisions Research · Quantum Chromodynamics and Particle Interactions · Particle physics theoretical and experimental studies