Prospects for measuring quark polarization and spin correlations in and samples at the LHC

Yevgeny Kats, David Uzan

Research output: Contribution to journalArticlepeer-review


Polarization and spin correlations have been studied in detail for top quarks at the LHC, but have been explored very little for the other flavors of quarks. In this paper we consider the processes pp → with q = b, c or s. Utilizing the partial preservation of the quark’s spin information in baryons in the jet produced by the quark, we examine possible analysis strategies for ATLAS and CMS to measure the quark polarization and spin correlations. We find polarization measurements for the b and c quarks to be feasible, even with the currently available datasets. Spin correlation measurements for are possible using the CMS Run 2 parked data, while such measurements for will become possible with higher integrated luminosity. For the s quark, we find the measurements to be challenging with the standard triggers. We also provide leading-order QCD predictions for the polarization and spin correlations expected in the and samples with the cuts envisioned for the above analyses. Apart from establishing experimentally the existence of spin correlations in and systems produced in pp collisions, the proposed measurements can provide new information on the polarization transfer from quarks to baryons and might even be sensitive to physics beyond the Standard Model.

Original languageEnglish
Article number63
JournalJournal of High Energy Physics
Issue number3
StatePublished - 1 Mar 2024


  • Bottom Quarks
  • Jets and Jet Substructure
  • Properties of Hadrons
  • Specific QCD Phenomenology

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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