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Publication Information
Title J/psi polarization in high multiplicity pp and pA collisions: CGC+NRQCD approach
Abstract Quarkonium production mechanism in high multiplicity small collision systems has recently been pursued in the color-glass-condensate (CGC) effective theory combined with non-relativistic QCD (NRQCD) factorization, allowing to study initial state interactions. Quarkonium polarization, potentially measured in future experiments, would help elucidate the quarkonium production mechanism at high multiplicities. In this paper, we provide predictions on $J/\psi$ polarization parameters in high multiplicity proton-proton ($pp$) and proton-nucleus ($pA$) collisions within the CGC+NRQCD framework. Theoretical predictions are given for $J/\psi$ rapidity $2.5< y_{J/\psi}<4$, charged-particle multiplicity pseudorapidity $|\eta_{ch} | <1$ and energies $\sqrt{S}=13\mathrm{~TeV}$ for $pp$, $\sqrt{S}=8.16\mathrm{~TeV}$ for $pA$ collisions. Considering two leptonic frame choices (Collins - Soper and helicity) we find a weak polarization of $J/\psi$ that additionally decreases with growing event activiti
Author(s) Tomasz Stebel, Kazuhiro Watanabe
Publication Date August 2021
Document Type Journal Article
Primary Institution Jagellonian University , Krakow, Poland
Affiliation Theory & Comp Physics / THEORY CENTER / THEORY CENTER
Funding Source Nuclear Physics (NP)
Proprietary? No
This publication conveys Technical Science Results
Document Numbers
JLAB Number: JLAB-THY-21-3483 OSTI Number: 1812602
LANL Number: arXiv:2103.01724 Other Number: DOE/OR/23177-5296
Associated with an experiment No
Associated with EIC No
Supported by Jefferson Lab LDRD Funding No
Journal Article
Journal Name Physical Review D
Refereed Yes
Volume 104
Issue
Page(s) 034004
Attachments/Datasets/DOI Link
Document(s)
PhysRevD.104.034004.pdf (STI Document)
PhysRevD.104.034004.pdf (Accepted Manuscript)
DOI Link
Dataset(s) (none)
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