{"@context":"http://schema.org","@id":"https://doi.org/10.17182/hepdata.153919.v1","@reverse":{"isBasedOn":[{"@type":"ScholarlyArticle","identifier":{"@type":"PropertyValue","propertyID":"URL","value":"https://inspirehep.net/literature/2725603"}},{"@id":"https://doi.org/10.1140/epjc/s10052-024-13228-0","@type":"JournalArticle"}]},"@type":"Dataset","additionalType":"Collection","author":{"@type":"Organization","name":"ALICE Collaboration"},"creator":{"@type":"Organization","name":"ALICE Collaboration"},"datePublished":"2024","description":"The first measurement of the multiplicity dependence of intra-jet properties of leading charged-particle jets in proton-proton (pp) collisions is reported. The mean charged-particle multiplicity and jet fragmentation distributions are measured in minimum-bias and high-multiplicity pp collisions at center-of-mass energy $\\sqrt{s}$ = 13 TeV using the ALICE detector. Jets are reconstructed from charged particles produced in the midrapidity region ($|\\eta| < 0.9$) using the sequential recombination anti-$k_{\\rm T}$ algorithm with jet resolution parameters $R$ = 0.2, 0.3, and 0.4 for the transverse momentum ($p_{\\rm T}$) interval 5$-$110 GeV/$c$. The high-multiplicity events are selected by the forward V0 scintillator detectors. The mean charged-particle multiplicity inside the leading jet cone rises monotonically with increasing jet $p_{\\rm T}$ in qualitative agreement with previous measurements at lower energies. The distributions of jet fragmentation function variables $z^{\\rm ch}$ and $\\xi^{\\rm ch}$ are measured for different jet-$p_{\\rm T}$ intervals. Jet-$p_{\\rm T}$ independent fragmentation of leading jets is observed for wider jets except at high- and low-$z^{\\rm ch}$ values. The observed ``hump-backed plateau'' structure in the $\\xi^{\\rm ch}$ distribution indicates suppression of low-$p_{\\rm T}$ particles. In high-multiplicity events, an enhancement of the fragmentation probability of low-$z^{\\rm ch}$ particles accompanied by a suppression of  high-$z^{\\rm ch}$ particles is observed compared to minimum-bias events. This behavior becomes more prominent for low-$p_{\\rm T}$ jets with larger jet radius. The results are compared with predictions of QCD-inspired event generators, PYTHIA 8 with Monash 2013 tune and EPOS LHC. It is found that PYTHIA 8 qualitatively reproduces the jet modification in high-multiplicity events except at high jet $p_{\\rm T}$. These measurements provide important constraints to models of jet fragmentation.","hasPart":[{"@id":"https://doi.org/10.17182/hepdata.153919.v1/t1","@type":"Dataset","description":"Mean number of charged particles ($\\langle N_{\\mathrm{ch}} \\rangle$) within leading charged-particle jets as a function of $p_{T}^{\\mathrm{jet, ch}}$ for minimum-bias...","name":"Figure 1 (top)"},{"@id":"https://doi.org/10.17182/hepdata.153919.v1/t2","@type":"Dataset","description":"Mean number of charged particles ($\\langle N_{\\mathrm{ch}} \\rangle$) within leading charged-particle jets as a function of $p_{T}^{\\mathrm{jet, ch}}$ for high-multiplicity...","name":"Figure 1 (bottom)"},{"@id":"https://doi.org/10.17182/hepdata.153919.v1/t3","@type":"Dataset","description":"The ratio of $\\langle N_{\\mathrm{ch}} \\rangle$ between high-multiplicity (HM) and minimum-bias (MB) events as a function of $p_{T}^{\\mathrm{jet, ch}}$ for...","name":"Figure 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distributions in leading jets for different $p_{T}^{\\mathrm{jet, ch}}$ intervals in high-multiplicity (HM) pp collisions for jet resolution parameter ($R$)...","name":"Figure 3 (bottom left)"},{"@id":"https://doi.org/10.17182/hepdata.153919.v1/t8","@type":"Dataset","description":"$z^{\\mathrm{ch}}$ distributions in leading jets for different $p_{T}^{\\mathrm{jet, ch}}$ intervals in high-multiplicity (HM) pp collisions for jet resolution parameter ($R$)...","name":"Figure 3 (bottom middle)"},{"@id":"https://doi.org/10.17182/hepdata.153919.v1/t9","@type":"Dataset","description":"$z^{\\mathrm{ch}}$ distributions in leading jets for different $p_{T}^{\\mathrm{jet, ch}}$ intervals in high-multiplicity (HM) pp collisions for jet resolution parameter ($R$)...","name":"Figure 3 (bottom right)"},{"@id":"https://doi.org/10.17182/hepdata.153919.v1/t10","@type":"Dataset","description":"The ratio of $z^{\\mathrm{ch}}$ distributions for $10 < p_{\\mathrm{T}}^{\\mathrm{jet, ch}} < 20$ GeV/c between high-multiplicity (HM) and minimum-bias (MB) events...","name":"Figure 5 (top)"},{"@id":"https://doi.org/10.17182/hepdata.153919.v1/t11","@type":"Dataset","description":"The ratio of $z^{\\mathrm{ch}}$ distributions for $30 < p_{\\mathrm{T}}^{\\mathrm{jet, ch}} < 40$ GeV/c between high-multiplicity (HM) and minimum-bias (MB) events...","name":"Figure 5 (middle)"},{"@id":"https://doi.org/10.17182/hepdata.153919.v1/t12","@type":"Dataset","description":"The ratio of $z^{\\mathrm{ch}}$ distributions for $60 < p_{\\mathrm{T}}^{\\mathrm{jet, ch}} < 80$ GeV/c between high-multiplicity (HM) and minimum-bias (MB) events...","name":"Figure 5 (bottom)"},{"@id":"https://doi.org/10.17182/hepdata.153919.v1/t13","@type":"Dataset","description":"$\\xi^{\\mathrm{ch}}$ distributions in leading jets for different $p_{T}^{\\mathrm{jet, ch}}$ intervals in minimum-bias (MB) pp collisions for jet resolution parameter ($R$)...","name":"Figure 7 (top 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ratio of $\\xi^{\\mathrm{ch}}$ distributions for $30 < p_{\\mathrm{T}}^{\\mathrm{jet, ch}} < 40$ GeV/c between high-multiplicity (HM) and minimum-bias (MB) events...","name":"Figure 9 (middle)"},{"@id":"https://doi.org/10.17182/hepdata.153919.v1/t21","@type":"Dataset","description":"The ratio of $\\xi^{\\mathrm{ch}}$ distributions for $60 < p_{\\mathrm{T}}^{\\mathrm{jet, ch}} < 80$ GeV/c between high-multiplicity (HM) and minimum-bias (MB) events...","name":"Figure 9 (bottom)"}],"identifier":[{"@type":"PropertyValue","propertyID":"HEPDataRecord","value":"https://www.hepdata.net/record/ins2725603?version=1"},{"@type":"PropertyValue","propertyID":"HEPDataRecordAlt","value":"https://www.hepdata.net/record/153919"}],"inLanguage":"en","name":"Multiplicity dependence of charged-particle intra-jet properties in pp collisions at $\\sqrt{s}$ = 13 TeV","provider":{"@type":"Organization","name":"HEPData"},"publisher":{"@type":"Organization","name":"HEPData"},"url":"https://www.hepdata.net/record/ins2725603?version=1","version":1}