Σ (1385) ± resonance production in Pb–Pb collisions at √sNN=5.02 TeV

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Σ (1385) ± resonance production in Pb–Pb collisions at √sNN=5.02 TeV. / ALICE Collaboration.

In: The European Physical Journal C, Vol. 83, No. 5, 351, 02.05.2023.

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Author

ALICE Collaboration. / Σ (1385) ± resonance production in Pb–Pb collisions at √sNN=5.02 TeV. In: The European Physical Journal C. 2023 ; Vol. 83, No. 5.

BibTeX

@article{5cf810b66d9142e4893a3a447d7b0f49,

title = "Σ (1385) ± resonance production in Pb–Pb collisions at √sNN=5.02 TeV",

abstract = "Hadronic resonances are used to probe the hadron gas produced in the late stage of heavy-ion collisions since they decay on the same timescale, of the order of 1–10 fm/c, as the decoupling time of the system. In the hadron gas, (pseudo)elastic scatterings among the products of resonances that decayed before the kinetic freeze-out and regeneration processes counteract each other, the net effect depending on the resonance lifetime, the duration of the hadronic phase, and the hadronic cross sections at play. In this context, the Σ (1385) ± particle is of particular interest as models predict that regeneration dominates over rescattering despite its relatively short lifetime of about 5.5 fm/c. The first measurement of the Σ (1385) ± resonance production at midrapidity in Pb–Pb collisions at sNN=5.02 TeV with the ALICE detector is presented in this Letter. The resonances are reconstructed via their hadronic decay channel, Λ π , as a function of the transverse momentum (pT) and the collision centrality. The results are discussed in comparison with the measured yield of pions and with expectations from the statistical hadronization model as well as commonly employed event generators, including PYTHIA8/Angantyr and EPOS3 coupled to the UrQMD hadronic cascade afterburner. None of the models can describe the data. For Σ (1385) ± , a similar behaviour as K ∗(892) is observed in data unlike the predictions of EPOS3 with afterburner.",

author = "{ALICE Collaboration} and S. Acharya and D. Adamov{\'a} and A. Adler and {Aglieri Rinella}, G. and M. Agnello and N. Agrawal and Z. Ahammed and S. Ahmad and Ahn, {S. U.} and I. Ahuja and A. Akindinov and M. Al-turany and D. Aleksandrov and B. Alessandro and Alfanda, {H. M.} and {Alfaro Molina}, R. and B. Ali and Y. Ali and A. Alici and N. Alizadehvandchali and A. Alkin and J. Alme and G. Alocco and T. Alt and I. Altsybeev and Anaam, {M. N.} and C. Andrei and A. Andronic and V. Anguelov and F. Antinori and P. Antonioli and C. Anuj and N. Apadula and L. Aphecetche and H. Appelsh{\"a}user and C. Arata and S. Arcelli and R. Arnaldi and Arsene, {I. C.} and M. Arslandok and A. Augustinus and R. Averbeck and S. Belokurova and G. Feofilov and V. Kovalenko and T. Lazareva and D. Nesterov and V. Vechernin and A. Zarochentsev and V. Zherebchevskii",

year = "2023",

month = may,

day = "2",

doi = "10.1140/epjc/s10052-023-11475-1",

language = "English",

volume = "83",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer Nature",

number = "5",

}

RIS

TY - JOUR

T1 - Σ (1385) ± resonance production in Pb–Pb collisions at √sNN=5.02 TeV

AU - ALICE Collaboration

AU - Acharya, S.

AU - Adamová, D.

AU - Adler, A.

AU - Aglieri Rinella, G.

AU - Agnello, M.

AU - Agrawal, N.

AU - Ahammed, Z.

AU - Ahmad, S.

AU - Ahn, S. U.

AU - Ahuja, I.

AU - Akindinov, A.

AU - Al-turany, M.

AU - Aleksandrov, D.

AU - Alessandro, B.

AU - Alfanda, H. M.

AU - Alfaro Molina, R.

AU - Ali, B.

AU - Ali, Y.

AU - Alici, A.

AU - Alizadehvandchali, N.

AU - Alkin, A.

AU - Alme, J.

AU - Alocco, G.

AU - Alt, T.

AU - Altsybeev, I.

AU - Anaam, M. N.

AU - Andrei, C.

AU - Andronic, A.

AU - Anguelov, V.

AU - Antinori, F.

AU - Antonioli, P.

AU - Anuj, C.

AU - Apadula, N.

AU - Aphecetche, L.

AU - Appelshäuser, H.

AU - Arata, C.

AU - Arcelli, S.

AU - Arnaldi, R.

AU - Arsene, I. C.

AU - Arslandok, M.

AU - Augustinus, A.

AU - Averbeck, R.

AU - Belokurova, S.

AU - Feofilov, G.

AU - Kovalenko, V.

AU - Lazareva, T.

AU - Nesterov, D.

AU - Vechernin, V.

AU - Zarochentsev, A.

AU - Zherebchevskii, V.

PY - 2023/5/2

Y1 - 2023/5/2

N2 - Hadronic resonances are used to probe the hadron gas produced in the late stage of heavy-ion collisions since they decay on the same timescale, of the order of 1–10 fm/c, as the decoupling time of the system. In the hadron gas, (pseudo)elastic scatterings among the products of resonances that decayed before the kinetic freeze-out and regeneration processes counteract each other, the net effect depending on the resonance lifetime, the duration of the hadronic phase, and the hadronic cross sections at play. In this context, the Σ (1385) ± particle is of particular interest as models predict that regeneration dominates over rescattering despite its relatively short lifetime of about 5.5 fm/c. The first measurement of the Σ (1385) ± resonance production at midrapidity in Pb–Pb collisions at sNN=5.02 TeV with the ALICE detector is presented in this Letter. The resonances are reconstructed via their hadronic decay channel, Λ π , as a function of the transverse momentum (pT) and the collision centrality. The results are discussed in comparison with the measured yield of pions and with expectations from the statistical hadronization model as well as commonly employed event generators, including PYTHIA8/Angantyr and EPOS3 coupled to the UrQMD hadronic cascade afterburner. None of the models can describe the data. For Σ (1385) ± , a similar behaviour as K ∗(892) is observed in data unlike the predictions of EPOS3 with afterburner.

AB - Hadronic resonances are used to probe the hadron gas produced in the late stage of heavy-ion collisions since they decay on the same timescale, of the order of 1–10 fm/c, as the decoupling time of the system. In the hadron gas, (pseudo)elastic scatterings among the products of resonances that decayed before the kinetic freeze-out and regeneration processes counteract each other, the net effect depending on the resonance lifetime, the duration of the hadronic phase, and the hadronic cross sections at play. In this context, the Σ (1385) ± particle is of particular interest as models predict that regeneration dominates over rescattering despite its relatively short lifetime of about 5.5 fm/c. The first measurement of the Σ (1385) ± resonance production at midrapidity in Pb–Pb collisions at sNN=5.02 TeV with the ALICE detector is presented in this Letter. The resonances are reconstructed via their hadronic decay channel, Λ π , as a function of the transverse momentum (pT) and the collision centrality. The results are discussed in comparison with the measured yield of pions and with expectations from the statistical hadronization model as well as commonly employed event generators, including PYTHIA8/Angantyr and EPOS3 coupled to the UrQMD hadronic cascade afterburner. None of the models can describe the data. For Σ (1385) ± , a similar behaviour as K ∗(892) is observed in data unlike the predictions of EPOS3 with afterburner.

UR - https://www.mendeley.com/catalogue/119a0e18-e5b8-34a3-9579-5f824513ce3c/

U2 - 10.1140/epjc/s10052-023-11475-1

DO - 10.1140/epjc/s10052-023-11475-1

M3 - Article

VL - 83

JO - European Physical Journal C

JF - European Physical Journal C

SN - 1434-6044

IS - 5

M1 - 351

ER -

ID: 106637840