| Issue |
EPJ Web Conf.
Volume 204, 2019
XXIV International Baldin Seminar on High Energy Physics Problems “Relativistic Nuclear Physics and Quantum Chromodynamics” (Baldin ISHEPP XXIV)
|
|
|---|---|---|
| Article Number | 08008 | |
| Number of page(s) | 6 | |
| Section | Hadron Spectroscopy, Multiquarks | |
| DOI | https://doi.org/10.1051/epjconf/201920408008 | |
| Published online | 03 April 2019 | |
https://doi.org/10.1051/epjconf/201920408008
Observation of resonance-like behavior of the pp → {pp}sπ0 reaction around √s = 2.65 GeV
1 Laboratory of Nuclear Problems, Joint Institute for Nuclear Research, RU-141980 Dubna, Russia
2 Institute of Nuclear Physics, KZ-050032 Almaty, Kazakhstan
3 L.N. Gumilyov Eurasian National University, KZ-010000 Astana, Kazakhstan
* e-mail: kurbatov@jinr.ru
Published online: 3 April 2019
The pp → {pp}sπ0 reaction, where {pp}s denotes a diproton, i.e. an unbound interacting proton pair in the 1S0 state, has been studied in order to obtain the forward differential cross section dσ/dΩ at 11 energy values in the region of 0.8–2.8 GeV. A resonance-like peak with the energy E0 = 2.647 ± 0.005 GeV and the width Γ = 0.26 ± 0.03 GeV has been observed in the energy dependence of the differential cross section dσ/dΩ at zero angle. The slope of the angular dependence for the energies in the peak region is different compared with the energies around it. Possible implications on this phenomenon are discussed.
© The Authors, published by EDP Sciences, 2019
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