Measurement of <math><mi>ω</mi></math> meson production in <math><mrow><mi>p</mi><mi>p</mi></mrow></math> and <math><mi>p</mi></math> -Pb collisions at <math><mrow><msqrt><msub><mi>s</mi><mrow><mi>N</mi><mi>N</mi></mrow></msub></msqrt><mo>=</mo><mn>5.02</mn></mrow></math> TeV

Measurement of <math><mi>ω</mi></math> meson production in <math><mrow><mi>p</mi><mi>p</mi></mrow></math> and <math><mi>p</mi></math> -Pb collisions at <math><mrow><msqrt><msub><mi>s</mi><mrow><mi>N</mi><mi>N</mi></mrow></msub></msqrt><mo>=</mo><mn>5.02</mn></mrow></math> TeV journals.aps.org 10/01/2025 10689731 10.1103/ls6w-x1bb Physical Review C 2469-9985 112 4 S AcharyaA AgarwalG Aglieri_RinellaL AgliettaM AgnelloN AgrawalZ AhammedS AhmadS U AhnI AhujaA AkindinovV AkishinaM Al-TuranyD AleksandrovB AlessandroH M AlfandaR Alfaro_MolinaB AliA AliciN AlizadehvandchaliA AlkinJ AlmeG AloccoT AltA R AltamuraI AltsybeevJ R AlvaradoM N AnaamC AndreiN AndreouA AndronicE AndronovV AnguelovF AntinoriP AntonioliN ApadulaH AppelshäuserC ArataS ArcelliR ArnaldiJ_G_M_C A ArneiroI C ArseneM ArslandokA AugustinusR AverbeckD AveryanovM D AzmiH BabaA BadalàJ BaeY BaeY W BaekX BaiR BailhacheY BailungR BalaA BaldisseriB BalisS BangaliaZ BanooV BarbasovaF BarileL BarioglioM BarlouB BarmanG G BarnaföldiL S 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SoramelA B Soto-HernandezR SpijkersI SputowskaJ StaaJ StachelI StanP J SteffanicT StellhornS F StiefelmaierD StoccoI StorehaugN J StrangmannP StratmannS StrazziA SturnioloC P StylianidisA_A P SuaideC SuireA SuiuM SukhanovM SuljicR SultanovV SumberiaS SumowidagdoN B SundstromL H TabaresS F TaghaviJ TakahashiG J TambaveS TangZ TangJ D Tapia_TakakiN TapusL A TarasovicovaM G TarzilaA TauroA Tavira_GarcíaG Tejeda_MuñozL TerlizziC TerrevoliD ThakurS ThakurM ThogersenD ThomasA TikhonovN TiltmannA R TimminsM TkacikA ToiaR TokumotoS TomassiniK TomohiroN TopilskayaM ToppiV V TorresA TrifiróT TrilokiA S TrioloS TripathyT TripathyS TrogoloV TrubnikovW H TrzaskaT P TrzcinskiC TsolantaR TuA TumkinR TurrisiT S TveterK UllalandB UlukutluS UpadhyayaA UrasM UrioniG L UsaiM VaidM ValaN ValleL_V R van_DoremalenM van_LeeuwenC A van_VeenR_J G van_WeeldenD VargaZ VargaP Vargas_TorresM VasileiouA VasilievO Vázquez_DoceO Vazquez_RuedaV VecherninP VeenE VercellinR VermaR VértesiM VerweijL VickovicZ VilakaziO Villalobos_BaillieA VillaniA VinogradovT VirgiliM_M O VirtaA VodopyanovB VolkelM A VölklS A VoloshinG VolpeB von_HallerI VorobyevN VozniukJ VrlákováJ WanC WangD WangY WangY WangZ WangA WegrzynekF T WeiglhoferS C WenzelJ P WesselsP K WiacekJ WiechulaJ WikneG WilkJ WilkinsonG A WillemsB WindelbandM WinnJ R WrightW WuY WuK XiongZ XiongR XuA YadavA K YadavY YamaguchiS YangS YanoE R YeatsJ YiZ YinI-K YooJ H YoonH YuS YuanA YuncuV ZaccoloC ZampolliF ZanoneN ZardoshtiA ZarochentsevP ZávadaM ZhalovB ZhangC ZhangL ZhangM ZhangM ZhangS ZhangX ZhangY ZhangY ZhangZ ZhangM ZhaoV ZherebchevskiiY ZhiD ZhouY ZhouJ ZhuS ZhuY ZhuS C ZugravelN ZurloALICE_Collaboration We present the measurement of the

p_{T}

-differential production cross sectionof

ω

mesons in and

p

-Pb collisions at

\sqrt{s_{N N}} = 5.02

TeV at midrapidity by ALICE. In addition, the first measurement of the nuclear modification factor

R_{p Pb}

for

ω

mesons at LHC energies is presented, complementing the existing measurements of lighter neutral mesons such as the

π^{0}

and

η

. Within the measured

p_{T}

range, the

R_{p Pb}

ω

mesons is compatible with no cold nuclear matter effects within the uncertainties, consistent with previous measurements at lower energies. The

ω / π^{0}

ratio is presented for both collision systems, showing no collision system dependence within the uncertainties. The comparison to previously published

ω / π^{0}

ratios at lower and higher collision energies in collisions suggests a decreasing trend of the ratio above

p_{T}

= 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.

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