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Description
Collisions of oxygen nuclei are planned in future LHC runs to scan the size of colliding systems at ultrarelativistic energies [1]. As shown by calculations [2,3], the admixture of the alpha-clustered states in O-16 leads to a triangular modulation of elliptic flow from the overlap region of colliding nuclei. The measurements [4] and modelling [5,6] of fragmentation of O-16 projectiles of lower energies of few GeV/nucleon demonstrated the enhanced production of spectator alpha-particles resulting from the alpha-clusterization in O-16.
In the present work a new version of the Abrasion-Ablation Monte Carlo for Colliders model (AAMCC-MST) is used to simulate O-16–O-16 collisions at the LHC. The model takes into account pre-equilibrium clusterization of spectator matter [7,8] and the admixture of alpha-clustered states in O-16 (AAMCC-MST) [5]. Three nuclear density profiles in O-16 were implemented in AAMCC-MST to sample the positions of neutrons and protons in O-16 [5]. The cross sections to produce various spectator nuclei (He, Li, Be, B, C, N) at the LHC and the multiplicity distributions of spectator alpha-particles are calculated and compared to the results obtained at lower collision energies. The production of spectator deuterons is also investigated as a possible indicator of the short-range correlations in nuclei [9]. The obtained results can help in evaluating the performance of Zero Degree Calorimeters in future LHC experiments on O-16–O-16 collisions.
References
[1] Z. Citron et al., CERN Yellow Rep. Monogr. 7 (2019) 1159
[2] W. Broniowsky et al., Nucl. Phys. A 1005 (2021) 121763
[3] S.H. Lim et al., Phys. Rev. C 99 (2019) 044904
[4] M. El-Nagdy et al., J. Phys. Commun. 2 (2018) 035010
[5] A.Svetlichnyi et al., Phys. Atom. Nucl., 2022, to be published
[6] A. Svetlichnyi et al., PoS, EPS-HEP2021 (2022) 310
[7] R. Nepeivoda, et al., Particles 5 (2022) 40
[8] N.Kozyrev et al. Eur. Phys. J. A 58 (2022) 184
[9] M.Alvioli et al., Phys. Lett. B 680 (2009) 225
