Resonant behavior of the pp→{pp}sπ0 reaction at the energy s =2.65 GeV
Tsirkov D. Baimurzinova B. Komarov V. Kulikov A. Kunsafina A. Kurbatov V. Kurmanalyiev Z. Uzikov Y.
January 2023American Physical Society
Physical Review C
2023#107Issue 1
We report on measurements of the differential cross section dσ/dω in the energy region of s=2.5-2.9GeV of the reaction pp→{pp}sπ0, where {pp}s is a S01 proton pair. The experiment has been performed with the ANKE spectrometer at COSY-Jülich. The data reveal a peak in the energy dependence of the forward {pp}s differential cross section at the energy s=2.65GeV with the width Γ=0.26GeV, and also the cross section slope changes its sign in the region of the observed peak. This is an indication for the excitation of a new D(2650) resonant state, that may be a dibaryon resonance system consisting of two excited baryons Δ(1232) and N∗(1440).
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Laboratory of Nuclear Problems, Joint Institute for Nuclear Research, Dubna, RU-141980, Russian Federation
Institute of Nuclear Physics, Almaty, KZ-050032, Kazakhstan
L. N. Gumilyov Eurasian National University, Nur-Sultan, KZ-010000, Kazakhstan
Department of Physics, Lomonosov Moscow State University, Moscow, RU-119991, Russian Federation
Dubna State University, Dubna, RU-141980, Russian Federation
Laboratory of Nuclear Problems
Institute of Nuclear Physics
L. N. Gumilyov Eurasian National University
Department of Physics
Dubna State University
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