Light anti-nuclei production in pp collisions at $\sqrt{s}$=7 and 14 TeV

TL;DR

This paper introduces a coalescence model to predict light anti-nuclei production in high-energy proton-proton collisions, validating it against experimental data and providing detailed yield and distribution predictions at 7 and 14 TeV.

Contribution

The study presents a new coalescence model based on phase space quantization and classical limits, applied to pp collisions, with validation against experimental data and detailed predictions.

Findings

PACIAE model yield matches ALICE data at 7 TeV

Predicted yields and distributions at 7 and 14 TeV

PACIAE yields are higher than PYTHIA, indicating rescattering effects

Abstract

A dynamically constrained coalescence model based on the phase space quantization and classical limit method was proposed to investigate the production of light nuclei (anti-nuclei) in non-single diffractive (NSD) pp collisions at $\sqrt{s}$=7 and 14 TeV. This calculation was based on the final hadronic state in the PYTHIA and PACIAE model simulations, the event sample consisted of 1.2$\times 10^8$ events in both simulations. The PACIAE model calculated $\bar D$ yield of 6.247$\times 10^{-5}$ in NSD pp collisions at $\sqrt{s}$=7 TeV is well comparing with the ALICE rough datum of 5.456$\times 10^{-5}$. It indicated the reliability of proposed method in some extent. The yield, transverse momentum distribution, and rapidity distribution of the $\bar D$, $^3{\bar{He}}$, and $_{\bar\Lambda} ^3{\bar H}$ in NSD pp collisions at $\sqrt{s} $=7 and 14 TeV were predicted by PACIAE and PYTHIA model simulations. The yield resulted from PACIAE model simulations is larger than the one from PYTHIA model. This might reflect the role played by the parton and hadron rescatterings.