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  • Multiplicity-dependent production of Σ(1385) ± and Ξ(1530)0 in pp collisions at s $$ \sqrt{s} $$ = 13 TeV
    B. Alessandro; M. N. Anaam; R. Averbeck; N. Bastid; A. Berdnikova; L. Betev; B. Bhattacharjee; L. Bianchi; L. Boldizsár; P. Braun-Munzinger; D. Budnikov; A. Caliva; P. Camerini; M. Carabas; V. Chibante Barroso; C. H. Christensen; P. Christiansen; Z. Conesa del Valle; P. Crochet; P. Das; G. de Cataldo; N. De Marco; R. Del Grande; L. Dello Stritto; Y. Ding; J. Ditzel; D. U. Dixit; N. Dzalaiova; R. Ejima; A. Feliciello; L. Ferrandi; U. Fuchs; C. D. Galvan; M. B. Gay Ducati; D. J. Q. Goh; N. A. Grunwald; G. G. Guardiano; B. Hippolyte; A. Isakov; S. Jaelani; R. Keidel; A. M. Khan; C. Kim; S. Kim; J. L. Klay; V. Kozhuharov; E. Kryshen; E. D. Lesser; J. R. Luhder; Q. W. Malik; G. V. Margagliotti; C. Mayer; M. Meres; S. Monira; I. Morozov; T. Mrnjavac; Y. Pachmayer; M. Pennisi; V. Petrov; M. Pikna; M. Puccio; L. Quaglia; A. Rakotozafindrabe; T. A. Rancien; S. S. Räsänen; H. D. Regules-Medel; M. Richter; K. Røed; P. G. Russek; B. Sahoo; C. Schmidt; R. Schotter; E. Scomparin; S. Senyukov; T. J. Shaba; K. Shigaki; S. Shirinkin; R. Singh; M. Sitta; C. Sonnabend; A. A. P. Suaide; M. Szymkowski; N. Tapus; L. A. Tarasovicova; S. Tripathy; R. Turrisi; Z. Varga; A. Vasiliev; R. Verma; L. Vermunt; R. Vértesi; Z. Vilakazi; M. M. O. Virta; V. Vislavicius; N. Vozniuk; J. Wilkinson; G. A. Willems; M. Winn; Y. Wu; Z. Yin

    The journal of high energy physics, 05/2024, Volume: 2024, Issue: 5
    Journal Article

    Abstract The production yields of the Σ(1385) ± and Ξ(1530)0 resonances are measured in pp collisions at s $$ \sqrt{s} $$ = 13 TeV with ALICE. The measurements are performed as a function of the charged-particle multiplicity ⟨dN ch /dη⟩, which is related to the energy density produced in the collision. The results include transverse momentum (p T) distributions, p T-integrated yields, mean transverse momenta of Σ(1385) ± and Ξ(1530)0, as well as ratios of the p T-integrated resonance yields relative to yields of other hadron species. The Σ(1385) ± /π ± and Ξ(1530)0 /π ± 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) ± and Ξ(1530)0 production in pp collisions at s $$ \sqrt{s} $$ = 13 TeV.

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