Medžiagų mechanika

Vislavičius, Kęstutis; Stupak, Stanislav

doi:10.3846/929-s

Cited by 13 publications

(14 citation statements)

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“…The top right and bottom panels of Figure 2 show φ/π and Ξ/φ ratios as a function of dN ch /dη respectively. In the φ/π ratio, the production of φ in large systems (Pb-Pb and Xe-Xe collisions) is well described by a grand-canonical thermal model (GSI-Heidelberg) [5], while for small systems (pp and p-Pb collisions) the increase of the φ/π ratio with multiplicity is in contrast to the expectation from strangeness canonical suppression (not shown) [6]. This behavior favors the non-equilibrium production of φ and/or strange particles.…”

Section: φ Meson Reconstruction and P T Spectramentioning

confidence: 96%

Energy dependence of ϕ(1020) production at mid-rapidity in pp collisions with ALICE at the LHC

Tripathy¹,

Acharya²,

Acosta³

et al. 2019

Nuclear Physics A

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Hadronic resonances are unique tools to investigate the interplay of re-scattering and regeneration effects during the hadronization phase in heavy-ion collisions. Measurements in small collision systems provide a necessary baseline for heavy-ion data, help to tune pQCD inspired event generators and give insight into the search for the onset of collective effects. As the φ meson has a longer lifetime compared to other resonances, it is expected that its production would be much less affected by regeneration and re-scattering processes. We report on measurements of φ meson production in minimum bias pp collisions at different beam energies and as a function of charged particle multiplicity with the ALICE detector at the LHC. The results include the transverse momentum (p T ) distributions of φ as well as the particle yield ratios. Finally, we have also studied the φ effective strangeness content by comparing our results to theoretical calculations.

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Section: φ Meson Reconstruction and P T Spectramentioning

confidence: 96%

Energy dependence of ϕ(1020) production at mid-rapidity in pp collisions with ALICE at the LHC

Tripathy¹,

Acharya²,

Acosta³

et al. 2019

Nuclear Physics A

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“…Canonical suppression effects have previously been considered at LHC energies, but either for strangeness only [30][31][32] or without light nuclei [33]. A qualitative description of the multiplicity dependence of ratios of yields of various strange hadrons to pions was obtained in the strangeness-canonical ensemble picture [31,32]. In the present work we consider the full canonical treatment of baryon number, electric charge, and strangeness, and include both hadrons and light nuclei.…”

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confidence: 99%

Multiplicity dependence of light nuclei production at LHC energies in the canonical statistical model

2018

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The statistical model with exact conservation of baryon number, electric charge, and strangenessthe Canonical Statistical Model (CSM) -is used to analyze the dependence of yields of light nuclei at midrapidity on charged pion multiplicity at the LHC. The CSM calculations are performed assuming baryon-symmetric matter, using the recently developed Thermal-FIST package. The light nuclei-toproton yield ratios show a monotonic increase with charged pion multiplicity, with a saturation at the corresponding grand-canonical values in the high-multiplicity limit, in good qualitative agreement with the experimental data measured by the ALICE collaboration in pp and Pb-Pb collisions at different centralities and energies. Comparison with experimental data at low multiplicities shows that exact conservation of charges across more than one unit of rapidity and/or a chemical freeze-out temperature which decreases with the charged pion multiplicity improves agreement with the data.

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“…(Color online) pT as a function of multiplicity ( < dN ch /dη >) for strange hadrons predicted by PYTHIA8 with and without rope hadronisation in p−p collisions at 7 TeV and 13 TeV. The PYTHIA estimations at 7 TeV and 13 TeV are also compared to the available data as measured by ALICE experiment[18] .…”

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confidence: 99%

“…(Color online) The PYTHIA8 predictions of pT integrated yields for K 0 S , Λ + Λ , Ξ − + Ξ + and Ω − + Ω + as a function of < dN ch /dη > |η|<0.5 using rope hadronisation. The estimations are also compared to the data measured by ALICE experiment at LHC[18].…”

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confidence: 99%

Effect of rope hadronization on strangeness enhancement in p−p collisions at LHC energies

2019

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The p−p collisions at high multiplicity at LHC show small scale collective effects similar to that observed in heavy ion collisions such as enhanced production of strange and multi-strange hadrons, long range azimuthal correlations, etc. The observation of strangeness enhancement in p−p collisions at at √ s = 7 TeV and 13 TeV as measured by ALICE experiment is explored using Pythia8 event generator within the framework of microscopic rope hadronization model which assumes the formation of ropes due to overlapping of strings in high multiplicity environment. The transverse momentum (pT ) spectra shape and its hardening with multiplicity is well described by the model. The mechanism of formation of ropes also described the observed experimental strangeness enhancement for higher multiplicity classes in p−p collisions at 7 TeV and 13 TeV. The enhancement with multiplicity is further investigated by studying the mean pT (< pT >) and the integrated yields (< dN/dy > ) of strange and multi-strange hadrons and comparing the predictions to the measured data at LHC for 7 TeV and 13 TeV. * ranjit@phy.iitb.ac.in † sp15ms159@iiserkol.ac.in ‡ sadhana@phy.iitb.ac.in

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Medžiagų mechanika

Cited by 13 publications

References 0 publications

Energy dependence of ϕ(1020) production at mid-rapidity in pp collisions with ALICE at the LHC

Energy dependence of ϕ(1020) production at mid-rapidity in pp collisions with ALICE at the LHC

Multiplicity dependence of light nuclei production at LHC energies in the canonical statistical model

Effect of rope hadronization on strangeness enhancement in p−p collisions at LHC energies

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