Total cross section of the reaction γd → π–pp in the threshold energy region
https://doi.org/10.29235/1561-8323-2020-64-2-159-163
Abstract
In the framework of the diagrammatic approach, the total cross section of near-threshold π– photoproduction on the deuteron is calculated. Contributions of the diagrams corresponding to the plane wave impulse approximation as well as to NN- and πN-interactions in the final state have been taken into account. We have compared the theoretical predictions with the results of the recent measurements performed at the MAX IV laboratory of the Lund University. There is good agreement with the data at photon energies from 147 to 155 MeV. However, at 158 and 160 MeV, the theoretical predictions significantly overestimate the measured cross sections.
Keywords
photon,
deuteron,
nucleon,
meson,
diagrammatic approach,
nucleon-nucleon potential,
pion photoproduction
Supporting agencies: This work was partly supported by Belarusian Republican Foundation for Fundamental Research (grant Ф18Д-010).
About the Authors
E. S. Kokoulina
Joint Institute for Nuclear Research
Russian Federation
Russian Federation
Kokoulina Elena S. – D. Sc. (Physics and Mathematics), Assistant Professor, Head of the Sector.
LHEP JINR, 141980, Dubna
M. I. Levchuk
B. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus
Belarus
Belarus
Levchuk Michael I. – D. Sc. (Physics and Mathematics), Chief researcher.
68-2, Nezavisimosti Ave., 220072, Minsk
M. N. Nevmerzhitsky
Institute of Applied Physics of the National Academy of Sciences of Belarus
Belarus
Belarus
Nevmerzhitsky Maxim N. – Researcher.
16, Akademicheskaya Str., 220072, Minsk
R. G. Shulyakovsky
Institute of Applied Physics of the National Academy of Sciences of Belarus
Belarus
Belarus
Shulyakovsky Roman G. – Ph. D. (Physics and Mathematics), Assistant Professor, Director.
16, Akademicheskaya Str., 220072, Minsk
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