Exploring differential two-particle correlations in $γp$ and low-multiplicity pp collisions using PYTHIA8
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arXiv
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866911464187494400 |
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| author | Behera, Subash Chandra Mallick, Dukhishyam |
| author_facet | Behera, Subash Chandra Mallick, Dukhishyam |
| contents | A study of two-particle differential number ($B$) and transverse momentum ($P_{2}^\mathrm{CD}$) balance functions in photon-proton ($γp$) and proton-proton (pp) collisions at $\sqrt{s}=$ 5.36 TeV is presented. The analysis focuses on inclusive charged hadrons within the pseudorapidity coverage $|η|<2.4$ and the transverse momentum interval $0.3 < p_\mathrm{T} < 3.0$ GeV and examines their correlations in terms of relative pseudorapidity ($Δη$) and relative azimuthal angle ($Δϕ$). The correlation functions are evaluated for same- and opposite-sign pairs, and their combinations are used to extract charge-dependent (CD) and charge-independent (CI) components. The evolution of the near-side peak of the CD correlations is investigated in terms of $Δη$ and $Δϕ$ as a function of charged-particle multiplicity ($N_\mathrm{ch}$) for $γp$ collisions and compared to pp collisions at a similar multiplicity range. A clear multiplicity dependence of the balance function width is obtained. The width is found systematically lower in $γp$ events than in pp collisions. This study provides valuable information on particle correlations and production mechanisms in low-$N_\mathrm{ch}$ regimes for upcoming measurements in small systems. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_20345 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Exploring differential two-particle correlations in $γp$ and low-multiplicity pp collisions using PYTHIA8 Behera, Subash Chandra Mallick, Dukhishyam Nuclear Experiment High Energy Physics - Experiment High Energy Physics - Phenomenology A study of two-particle differential number ($B$) and transverse momentum ($P_{2}^\mathrm{CD}$) balance functions in photon-proton ($γp$) and proton-proton (pp) collisions at $\sqrt{s}=$ 5.36 TeV is presented. The analysis focuses on inclusive charged hadrons within the pseudorapidity coverage $|η|<2.4$ and the transverse momentum interval $0.3 < p_\mathrm{T} < 3.0$ GeV and examines their correlations in terms of relative pseudorapidity ($Δη$) and relative azimuthal angle ($Δϕ$). The correlation functions are evaluated for same- and opposite-sign pairs, and their combinations are used to extract charge-dependent (CD) and charge-independent (CI) components. The evolution of the near-side peak of the CD correlations is investigated in terms of $Δη$ and $Δϕ$ as a function of charged-particle multiplicity ($N_\mathrm{ch}$) for $γp$ collisions and compared to pp collisions at a similar multiplicity range. A clear multiplicity dependence of the balance function width is obtained. The width is found systematically lower in $γp$ events than in pp collisions. This study provides valuable information on particle correlations and production mechanisms in low-$N_\mathrm{ch}$ regimes for upcoming measurements in small systems. |
| title | Exploring differential two-particle correlations in $γp$ and low-multiplicity pp collisions using PYTHIA8 |
| topic | Nuclear Experiment High Energy Physics - Experiment High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2602.20345 |