Light (anti-)nuclei and (anti-)hypertriton production in $pp$ collisions at $\sqrt{s} =0.90, 2.76$ and $7$ TeV

TL;DR

This study models the production of light (anti-)nuclei and hypertritons in proton-proton collisions at various energies, successfully reproducing experimental data and predicting properties of heavier nuclei, revealing yield dependencies on mass and strangeness factors.

Contribution

It combines the DCPC and PACIAE models to accurately simulate light (anti-)nuclei production in $pp$ collisions and predicts yields and ratios for nuclei not yet measured.

Findings

Model reproduces ALICE data for deuterons and antideuterons.

Yields decrease sharply with increasing mass number A.

Strangeness population factor s_3 is about 0.7 to 0.8, matching experimental results.

Abstract

Production of light (anti-)nuclei and (anti-)hypertriton within midrapidity ($|y|<0.5$) and $p_T<3.0$ GeV/c in $pp$ interactions at $\sqrt{s}$ = 0.90, 2.76 and 7 TeV is investigated by the dynamically constrained phase space coalescence model (DCPC), combined with {\footnotesize{PACIAE}} model. The ALICE data for yields, ratios, as well as transverse momentum distributions of $\overline{d}$ and $d$ are well reproduced by the model simulations, meanwhile the three basic characters of $\rm^3{\overline{He}}$, $\rm^3{{He}}$, $\rm{{^3_{\overline \Lambda}\overline H}}$, and $\rm{^3_\Lambda H}$ are also predicted. Besides, we found the yields of light (anti-)nuclei produced are dependent upon their mass number $A$, namely, their yields sharply decrease with the increasing of $A$. The strangeness population factor $s_3=\rm{({^3_{\Lambda}H}/{^3{He}})/(\Lambda/p)}$ is found to be about 0.7 $\sim$ 0.8, and is comparable with the available experimental results.