English

Energy loss baseline for light hadrons in oxygen-oxygen collisions at $\sqrt{s_\mathrm{NN}}=5.36\,\text{TeV}$

High Energy Physics - Phenomenology 2025-09-10 v1 Nuclear Experiment Nuclear Theory

Abstract

I present predictions for inclusive charged hadron spectra in minimum-bias proton-proton and oxygen-oxygen collisions at a centre-of-mass energy of sNN=5.36TeV\sqrt{s_\mathrm{NN}} = 5.36\,\text{TeV}, assuming no final-state interactions. Using next-to-leading order perturbative QCD matrix elements, along with state-of-the-art (nuclear) parton distribution and fragmentation functions, I establish a baseline for the nuclear modification factor RAAhR^h_\text{AA} in oxygen-oxygen collisions in the absence of quenching. Theoretical uncertainties in this baseline are found to be substantial for transverse momenta below 20GeV20\,\text{GeV}. In the intermediate range 20GeVpTh70GeV20\,\text{GeV} \lesssim p_T^h \lesssim 70\,\text{GeV}, these uncertainties are significantly reduced to approximately 5\%. At higher momenta (pTh70GeVp_T^h \gtrsim 70\,\text{GeV}), however, predictions exhibit a marked spread due to differences between fragmentation functions, reflecting varying assumptions about isospin symmetry. Finally, I show that considering neon-neon collisions in the initial state or neutral pions in the final state does not appreciably change the nuclear modification factor.

Keywords

Cite

@article{arxiv.2509.07008,
  title  = {Energy loss baseline for light hadrons in oxygen-oxygen collisions at $\sqrt{s_\mathrm{NN}}=5.36\,\text{TeV}$},
  author = {Aleksas Mazeliauskas},
  journal= {arXiv preprint arXiv:2509.07008},
  year   = {2025}
}

Comments

9 pages, 7 figures, data in the plots can be found at https://github.com/amazeliauskas/OO_baseline