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
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
