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Measurement of 𝜔 meson production in pp and p-Pb collisions at √sNN = 5.02 TeV

We present the measurement of the 𝑝T-differential production cross section of 𝜔 mesons in pp and 𝑝-Pb collisions at √𝑠𝑁⁢𝑁=5.02 TeV at midrapidity by ALICE. In addition, the first measurement of the nuclear modification factor 𝑅𝑝⁢Pb for 𝜔 mesons at LHC energies is presented, complementing the existin...

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Main Authors: Acharya, Shreyasi (Author) , Angelov, Venelin (Author) , Berdnikova, Anastasia (Author) , Bergmann, Luisa (Author) , Bórquez Cárcamo, Andrés G. (Author) , Danisch, Meike (Author) , Feuillard, Victor (Author) , Fokin, Ilya D. (Author) , Glässel, Peter (Author) , Grünwald, Nadine (Author) , Menzel, Marius (Author) , Nath, Abhishek (Author) , Reygers, Klaus (Author) , Schicker, Rainer (Author) , Schlepper, Felix (Author) , Seo, Jinjoo (Author) , Skorodumovs, Georgijs (Author) , Stachel, Johanna (Author) , Stiefelmaier, Stephan (Author) , Veen, Casper Arie van (Author) , Windelband, Bernd (Author) , Yüncü, Alperen (Author) , Zanone, Federica (Author) , Zhang, Biao (Author)
Corporate Author: ALICE (Author)
Format: Article (Journal)
Language:English
Published: 16 October 2025
In: Physical review
Year: 2025, Volume: 112, Issue: 4, Pages: 1-19
ISSN:2469-9993
DOI:10.1103/ls6w-x1bb
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1103/ls6w-x1bb
Verlag, kostenfrei, Volltext: https://link.aps.org/doi/10.1103/ls6w-x1bb
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Author Notes:S. Acharya et al., (ALICE Collaboration)
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Summary:We present the measurement of the 𝑝T-differential production cross section of 𝜔 mesons in pp and 𝑝-Pb collisions at √𝑠𝑁⁢𝑁=5.02 TeV at midrapidity by ALICE. In addition, the first measurement of the nuclear modification factor 𝑅𝑝⁢Pb for 𝜔 mesons at LHC energies is presented, complementing the existing measurements of lighter neutral mesons such as the 𝜋0 and 𝜂. Within the measured 𝑝T range, the 𝑅𝑝⁢Pb of 𝜔 mesons is compatible with no cold nuclear matter effects within the uncertainties, consistent with previous measurements at lower energies. The 𝜔/𝜋0 ratio is presented for both collision systems, showing no collision system dependence within the uncertainties. The comparison to previously published 𝜔/𝜋0 ratios at lower and higher collision energies in pp collisions suggests a decreasing trend of the ratio above 𝑝T = 4 GeV/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 𝜔 mesons.
Item Description:Im Titel steht "sNN" unter dem Wurzelsymbol, dabei ist "NN" tiefgestellt
ALICE Collaboration: S. Acharya, V. Anguelov, A. Berdnikova, L. Bergmann, A.G. Borquez Carcamo, M.C. Danisch, V.J.G. Feuillard, I. Fokin, P. Glässel, N.A. Grunwald, M.W. Menzel, A. Nath, K. Reyers, R. Schicker, F. Schlepper, J. Seo, G. Skorodumovs, J. Stachel, S.F. Stiefelmaier, C.A. van Veen, B. Windelband, A. Yuncu, F. Zanone, B. Zhang und weitere 1051
Gesehen am 28.04.2026
Physical Description:Online Resource
ISSN:2469-9993
DOI:10.1103/ls6w-x1bb

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