https://doi.org/10.1140/epjp/s13360-022-03276-4
Regular Article
String-based models analysis of proton, 
and 
production in central 
collisions at CERN SPS energies
Physics Department, Faculty of Applied Science, Umm Al-Qura university, 21421, Makkah, Saudi Arabia
Received:
25
June
2022
Accepted:
5
September
2022
Published online:
15
September
2022
We describe how string-based models such as HIJING and PYTHIA8/Angantyr models describe proton, and rapidity and transverse momentum (
) spectra from the 
most central Be+Be collisions at the beam momentum range of 19 AGeV/c to 150 AGeV/c, recently measured in NA61/SHINE experiment at CERN. The HIJING model is extended with a more modern version of PYTHIA (version 6.4), which includes both the hard QCD and standard Lund string routines of PYTHIA8. As for Angantyr, the initial conditions for light nuclei (
) are updated with a GLISSANDO (Glauber initial state simulation and more) harmonic oscillator shell (HOS) model density profile. It is found that different treatments of diffractive-like events implemented in both models do not lead to a satisfactorily description of the identified hadron spectra. We also compare the PYTHIA8/Angantyr/HOS results using two different mechanisms of the string break-up during the hadronization process, namely, the traditional one (Schwinger-model like) and the thermal one, where each hadron from string breaking is assigned an exponential hadron mass suppression weight times relevant spin and symmetry factors. Good agreement is generally obtained with the thermal model calculations at the whole SPS energies. In particular, it is found that the thermal model is more suited for the description of the identified hadron rapidity and spectra, where there are more pions and kaons produced, and fewer protons at midrapidity 
.
The original online version of this article was revised: In the Acknowledgements of this article the grant code was incorrectly given as “22UQU43312168DSR03” and should have been “22UQU4331268DSR03”. The original article has been corrected.
A correction to this article is available online at https://doi.org/10.1140/epjp/s13360-023-04691-x.
Copyright comment corrected publication 2023
Copyright comment Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2022. corrected publication 2023. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
