Spin-spin correlations in ΛΛ̅ pair production at the SPD experiment at NICA
Abstract
Recent measurements by the STAR collaboration have demonstrated that spin correlations of ΛΛ̅ pairs provide sensitivity to the spin structure of ss̅ pairs and to spin transfer during hadronization.These results, together with recent CMS measurements at higher energies, open a new avenue for studying spin dynamics in the transition from partons to hadrons. A feasibility study of spin-spin correlations in ΛΛ̅ pairs at the SPD experiment at NICA is presented for pp and dd collisions at √(sNN)≤27~GeV. The expected correlation PΛΛ̅ is estimated within the SU(6) and Burkardt--Jaffe models for a spin-triplet ss̅ pair. The kinematic properties of the process are analysed, and the suitability of the detector for such measurements is evaluated using a full simulation. The SPD experiment provides an opportunity to investigate the relative contributions of non-perturbative and perturbative ss̅-production mechanisms and, with polarized beams, to study the role of initial-state polarization in spin-dependent partonic dynamics.
Related
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BibTeX
@misc{gubachev2026spinspin,
title = {{Spin-spin correlations in $Λ\barΛ$ pair production at the SPD experiment at NICA}},
author = {D. Gubachev and A. Guskov},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.25383},
eprint = {2609.25383},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.25383},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Spin-spin correlations in ΛΛ̅ pair production at the SPD experiment at NICA
AU - D. Gubachev
AU - A. Guskov
PY - 2026
DA - 2026/09/21
PB - arXiv
DO - 10.48550/arxiv.2609.25383
UR - https://arxiv.org/abs/2609.25383
AB - Recent measurements by the STAR collaboration have demonstrated that spin correlations of ΛΛ̅ pairs provide sensitivity to the spin structure of ss̅ pairs and to spin transfer during hadronization.These results, together with recent CMS measurements at higher energies, open a new avenue for studying spin dynamics in the transition from partons to hadrons. A feasibility study of spin-spin correlations in ΛΛ̅ pairs at the SPD experiment at NICA is presented for pp and dd collisions at √(s_NN)≤27~GeV. The expected correlation P_ΛΛ̅ is estimated within the SU(6) and Burkardt--Jaffe models for a spin-triplet ss̅ pair. The kinematic properties of the process are analysed, and the suitability of the detector for such measurements is evaluated using a full simulation. The SPD experiment provides an opportunity to investigate the relative contributions of non-perturbative and perturbative ss̅-production mechanisms and, with polarized beams, to study the role of initial-state polarization in spin-dependent partonic dynamics.
ER -