Dataset

GSI-2026-00216

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Measurement of $\omega$ meson production in pp and p-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV

ALICE Collaboration (Corresponding author)

2025

Please use a persistent id in citations: doi:10.17182/HEPDATA.165463.V1

Abstract: We present the measurement of the $p_{\rm T}$-differential production cross section of $\omega$ mesons in pp and p--Pb collisions at $\sqrt{s_{\text{\tiny NN}}}=5.02$ TeV at midrapidity by ALICE. In addition, the first measurement of the nuclear modification factor $R_{\text{pPb}}$ for $\omega$ mesons at LHC energies is presented, complementing the existing measurements of lighter neutral mesons such as the $\pi^0$ and $\eta$. Within the measured $p_{\rm T}$-range, the $R_{\text{pPb}}$ of $\omega$ mesons shows no cold nuclear matter effects within the uncertainties, consistent with previous measurements at lower energies. The $\omega/\pi^{0}$ ratio is presented for both collision systems, showing no collision system dependence within the uncertainties. The comparison to previously published $\omega/\pi^0$ ratios at lower and higher collision energies in pp collisions suggests a decreasing trend of the ratio above $p_{\rm T}$ = 4GeV/$c$ with increasing collision energy. The data in both collision systems are compared to predictions from PYTHIA 8, EPOS LHC and DPMJET event generators, revealing significant shortcomings in these models' ability to describe the production of $\omega$ mesons.

Note: Journal Article GSI record: GSI-2026-00215

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Contributing Institute(s):

1. ALICE (ALI)
2. Detektorlabor (DTL)
3. IT (CIT)
4. ExtreMe Matter Institute, EMMI (EXM)
5. Collaboration CERN: ALICE (ALICE@CERN)

Research Program(s):

1. 612 - Cosmic Matter in the Laboratory (POF4-612) (POF4-612)
2. HGS-HIRe - HGS-HIRe for FAIR (HGS-HIRe) (HGS-HIRe)
3. SUC-GSI-Heidelberg - Strategic university cooperation GSI-U Heidelberg (SUC-GSI-HE) (SUC-GSI-HE)
4. SUC-GSI-Frankfurt - Strategic university cooperation GSI-U Frankfurt/M (SUC-GSI-FR) (SUC-GSI-FR)
5. SUC-GSI-Darmstadt - Strategic university cooperation GSI-TU Darmstadt (SUC-GSI-DA) (SUC-GSI-DA)
6. STRONG-2020 - The strong interaction at the frontier of knowledge: fundamental research and applications (824093) (824093)

Experiment(s):

1. LHC: ALICE

Appears in the scientific report 2025

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Journal Article Acharya, S. ; Agarwal, A. ; Aglieri Rinella, G. ; et al
Measurement of $\omega$ meson production in pp and p-Pb collisions at $\sqrt{s_{\rm NN}} = 5.02$ TeV
Physical review / C 112(4), 044904 (2025) [10.1103/ls6w-x1bb]2025   Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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