Multiplicity-dependent production of $Σ(1385)^{\pm}$ and $Ξ(1530)^{0}$ in pp collisions at $\sqrt{s}=13$ TeV
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arXiv
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| Formato: | Preprint |
| Publicado: |
2023
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| _version_ | 1866913380747444224 |
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| author | ALICE Collaboration |
| author_facet | ALICE Collaboration |
| contents | The production yields of the $Σ(1385)^{\pm}$ and $Ξ(1530)^{0}$ resonances are measured in pp collisions at $\sqrt{s}=13$ TeV with ALICE. The measurements are performed as a function of the charged-particle multiplicity $\langle \mathrm{d}N_\mathrm{ch}/\mathrm{d}η\rangle$, which is related to the energy density produced in the collision. The results include transverse momentum ($p_{\rm T}$) distributions, $p_{\rm T}$-integrated yields, mean transverse momenta of $Σ(1385)^{\pm}$ and $Ξ(1530)^{0}$, as well as ratios of the $p_{\rm T}$-integrated resonance yields relative to yields of other hadron species. The $Σ(1385)^{\pm}/π^{\pm}$ and $Ξ(1530)^{0}/π^{\pm}$ yield ratios are consistent with the trend of the enhancement of strangeness production from low to high multiplicity pp collisions, which was previously observed for strange and multi-strange baryons. The yield ratio between the measured resonances and the long-lived baryons with the same strangeness content exhibits a hint of a mild increasing trend at low multiplicity, despite too large uncertainties to exclude the flat behaviour. The results are compared with predictions from models such as EPOS-LHC and PYTHIA 8 with Rope shoving. The latter provides the best description of the multiplicity dependence of the $Σ(1385)^{\pm}$ and $Ξ(1530)^{0}$ production in pp collisions at $\sqrt{s}=13$ TeV. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2308_16116 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Multiplicity-dependent production of $Σ(1385)^{\pm}$ and $Ξ(1530)^{0}$ in pp collisions at $\sqrt{s}=13$ TeV ALICE Collaboration Nuclear Experiment High Energy Physics - Experiment The production yields of the $Σ(1385)^{\pm}$ and $Ξ(1530)^{0}$ resonances are measured in pp collisions at $\sqrt{s}=13$ TeV with ALICE. The measurements are performed as a function of the charged-particle multiplicity $\langle \mathrm{d}N_\mathrm{ch}/\mathrm{d}η\rangle$, which is related to the energy density produced in the collision. The results include transverse momentum ($p_{\rm T}$) distributions, $p_{\rm T}$-integrated yields, mean transverse momenta of $Σ(1385)^{\pm}$ and $Ξ(1530)^{0}$, as well as ratios of the $p_{\rm T}$-integrated resonance yields relative to yields of other hadron species. The $Σ(1385)^{\pm}/π^{\pm}$ and $Ξ(1530)^{0}/π^{\pm}$ yield ratios are consistent with the trend of the enhancement of strangeness production from low to high multiplicity pp collisions, which was previously observed for strange and multi-strange baryons. The yield ratio between the measured resonances and the long-lived baryons with the same strangeness content exhibits a hint of a mild increasing trend at low multiplicity, despite too large uncertainties to exclude the flat behaviour. The results are compared with predictions from models such as EPOS-LHC and PYTHIA 8 with Rope shoving. The latter provides the best description of the multiplicity dependence of the $Σ(1385)^{\pm}$ and $Ξ(1530)^{0}$ production in pp collisions at $\sqrt{s}=13$ TeV. |
| title | Multiplicity-dependent production of $Σ(1385)^{\pm}$ and $Ξ(1530)^{0}$ in pp collisions at $\sqrt{s}=13$ TeV |
| topic | Nuclear Experiment High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2308.16116 |