Σ ̄± production in pp and p-Pb collisions at sNN=5.02 TeV with ALICE

ALICE Collaboration

doi:10.1140/epjc/s10052-025-15129-2

Σ ̄± production in pp and p-Pb collisions at sNN=5.02 TeV with ALICE

ALICE Collaboration

Relativistic Nuclear Physics

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

The transverse momentum spectra and integrated yields of anti-Σ hyperons (Σ¯±) have been measured in pp and p-Pb collisions at sNN=5.02 TeV with the ALICE experiment. Measurements are performed via the newly accessed decay channel Σ¯±→n¯π±. A new method of antineutron reconstruction with the PHOS electromagnetic spectrometer is developed and applied to this analysis. The pT spectra of Σ¯± are measured in the range 0.5<pT<3 GeV/c and compared to predictions of the PYTHIA 8, DPMJET, PHOJET, EPOS LHC and EPOS4 models. The EPOS LHC and EPOS4 models provide the best descriptions of the measured spectra both in pp and p-Pb collisions, while models which do not account for multiparton interactions provide a considerably worse description at high pT. The total yields of Σ¯± in both pp and p-Pb collisions are compared to predictions of the Thermal-FIST model and dynamical models PYTHIA 8, DPMJET, PHOJET, EPOS LHC and EPOS4. All models reproduce the total yields in both colliding systems within uncertainties. The nuclear modification factors RpPb for both Σ¯+ and Σ¯- are evaluated and compared to those of protons, Λ and Ξ hyperons, and predictions of EPOS LHC and EPOS4 models. No deviations of RpPb for Σ¯± from the model predictions or measurements for other hadrons are found within uncertainties.

Original language	English
Article number	132
Journal	European Physical Journal C
Volume	86
Issue number	2
DOIs	https://doi.org/10.1140/epjc/s10052-025-15129-2
State	Published - Feb 2026

Funding

The ALICE Collaboration would like to thank all its engineers and technicians for their invaluable contributions to the construction of the experiment and the CERN accelerator teams for the outstanding performance of the LHC complex. The ALICE Collaboration gratefully acknowledges the resources and support provided by all Grid centres and the Worldwide LHC Computing Grid (WLCG) collaboration. The ALICE Collaboration acknowledges the following funding agencies for their support in building and running the ALICE detector: A. I. Alikhanyan National Science Laboratory (Yerevan Physics Institute) Foundation (ANSL), State Committee of Science and World Federation of Scientists (WFS), Armenia; Austrian Academy of Sciences, Austrian Science Fund (FWF): [M 2467-N36] and Nationalstiftung für Forschung, Technologie und Entwicklung, Austria; Ministry of Communications and High Technologies, National Nuclear Research Center, Azerbaijan; Rede Nacional de Física de Altas Energias (Renafae), Financiadora de Estudos e Projetos (Finep), Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) and The Sao Paulo Research Foundation (FAPESP), Brazil; Bulgarian Ministry of Education and Science, within the National Roadmap for Research Infrastructures 2020-2027 (object CERN), Bulgaria; Ministry of Education of China (MOEC), Ministry of Science and Technology of China (MSTC) and National Natural Science Foundation of China (NSFC), China; Ministry of Science and Education and Croatian Science Foundation, Croatia; Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear (CEADEN), Cubaenergía, Cuba; Ministry of Education, Youth and Sports of the Czech Republic, Czech Republic; The Danish Council for Independent Research | Natural Sciences, the VILLUM FONDEN and Danish National Research Foundation (DNRF), Denmark; Helsinki Institute of Physics (HIP), Finland; Commissariat à l’Energie Atomique (CEA) and Institut National de Physique Nucléaire et de Physique des Particules (IN2P3) and Centre National de la Recherche Scientifique (CNRS), France; Bundesministerium für Forschung, Technologie und Raumfahrt (BMFTR) and GSI Helmholtzzentrum für Schwerionenforschung GmbH, Germany; General Secretariat for Research and Technology, Ministry of Education, Research and Religions, Greece; National Research, Development and Innovation Office, Hungary; Department of Atomic Energy Government of India (DAE), Department of Science and Technology, Government of India (DST), University Grants Commission, Government of India (UGC) and Council of Scientific and Industrial Research (CSIR), India; National Research and Innovation Agency-BRIN, Indonesia; Istituto Nazionale di Fisica Nucleare (INFN), Italy; Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT) and Japan Society for the Promotion of Science (JSPS) KAKENHI, Japan; Consejo Nacional de Ciencia (CONACYT) y Tecnología, through Fondo de Cooperación Internacional en Ciencia y Tecnología (FONCICYT) and Dirección General de Asuntos del Personal Academico (DGAPA), Mexico; Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO), Netherlands; The Research Council of Norway, Norway; Pontificia Universidad Católica del Perú, Peru; Ministry of Science and Higher Education, National Science Centre and WUT ID-UB, Poland; Korea Institute of Science and Technology Information and National Research Foundation of Korea (NRF), Republic of Korea; Ministry of Education and Scientific Research, Institute of Atomic Physics, Ministry of Research and Innovation and Institute of Atomic Physics and Universitatea Nationala de Stiinta si Tehnologie Politehnica Bucuresti, Romania; Ministerstvo skolstva, vyskumu, vyvoja a mladeze SR, Slovakia; National Research Foundation of South Africa, South Africa; Swedish Research Council (VR) and Knut and Alice Wallenberg Foundation (KAW), Sweden; European Organization for Nuclear Research, Switzerland; Suranaree University of Technology (SUT), National Science and Technology Development Agency (NSTDA) and National Science, Research and Innovation Fund (NSRF via PMU-B B05F650021), Thailand; Turkish Energy, Nuclear and Mineral Research Agency (TENMAK), Turkey; National Academy of Sciences of Ukraine, Ukraine; Science and Technology Facilities Council (STFC), United Kingdom; National Science Foundation of the United States of America (NSF) and United States Department of Energy, Office of Nuclear Physics (DOE NP), United States of America. In addition, individual groups or members have received support from: Czech Science Foundation (grant no. 23-07499S), Czech Republic; FORTE project, reg. no. CZ.02.01.01/00/22_008/0004632, Czech Republic, co-funded by the European Union, Czech Republic; European Research Council (grant no. 950692), European Union; Deutsche Forschungs Gemeinschaft (DFG, German Research Foundation) “Neutrinos and Dark Matter in Astro- and Particle Physics” (grant no. SFB 1258), Germany; ICSC-National Research Center for High Performance Computing, Big Data and Quantum Computing and FAIR-Future Artificial Intelligence Research, funded by the NextGenerationEU program (Italy).

Access to Document

10.1140/epjc/s10052-025-15129-2

Cite this

@article{7d146ace4fd5441983433a464f1aa6ef,

title = "Σ{\= }± production in pp and p-Pb collisions at sNN=5.02 TeV with ALICE",

abstract = "The transverse momentum spectra and integrated yields of anti-Σ hyperons (Σ¯±) have been measured in pp and p-Pb collisions at sNN=5.02 TeV with the ALICE experiment. Measurements are performed via the newly accessed decay channel Σ¯±→n¯π±. A new method of antineutron reconstruction with the PHOS electromagnetic spectrometer is developed and applied to this analysis. The pT spectra of Σ¯± are measured in the range 0.5",

author = "\{ALICE Collaboration\} and N. Zurlo and Zugravel, \{S. C.\} and A. Zingaretti and Y. Zhu and S. Zhu and J. Zhu and Y. Zhou and D. Zhou and Y. Zhi and V. Zherebchevskii and M. Zhao and Z. Zhang and Y. Zhang and Y. Zhang and X. Zhang and S. Zhang and M. Zhang and M. Zhang and L. Zhang and C. Zhang and B. Zhang and P. Z{\'a}vada and N. Zardoshti and F. Zanone and C. Zampolli and V. Zaccolo and A. Yuncu and S. Yuan and H. Yu and Yoon, \{J. H.\} and Yoo, \{I. K.\} and Z. Yin and R. Yin and J. Yi and Yeats, \{E. R.\} and S. Yano and S. Yang and S. Yang and Y. Yamaguchi and Yadav, \{A. K.\} and A. Yadav and R. Xu and L. Xu and Z. Xiong and K. Xiong and Y. Wu and Schmidt, \{N. V.\} and J. Schambach and Read, \{K. F.\} and F. Bock",

note = "Publisher Copyright: {\textcopyright} CERN for the benefit of the ALICE Collaboration 2026.",

year = "2026",

month = feb,

doi = "10.1140/epjc/s10052-025-15129-2",

language = "English",

volume = "86",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "SpringerOpen",

number = "2",

}

TY - JOUR

T1 - Σ ̄± production in pp and p-Pb collisions at sNN=5.02 TeV with ALICE

AU - ALICE Collaboration

AU - Zurlo, N.

AU - Zugravel, S. C.

AU - Zingaretti, A.

AU - Zhu, Y.

AU - Zhu, S.

AU - Zhu, J.

AU - Zhou, Y.

AU - Zhou, D.

AU - Zhi, Y.

AU - Zherebchevskii, V.

AU - Zhao, M.

AU - Zhang, Z.

AU - Zhang, Y.

AU - Zhang, X.

AU - Zhang, S.

AU - Zhang, M.

AU - Zhang, L.

AU - Zhang, C.

AU - Zhang, B.

AU - Závada, P.

AU - Zardoshti, N.

AU - Zanone, F.

AU - Zampolli, C.

AU - Zaccolo, V.

AU - Yuncu, A.

AU - Yuan, S.

AU - Yu, H.

AU - Yoon, J. H.

AU - Yoo, I. K.

AU - Yin, Z.

AU - Yin, R.

AU - Yi, J.

AU - Yeats, E. R.

AU - Yano, S.

AU - Yang, S.

AU - Yamaguchi, Y.

AU - Yadav, A. K.

AU - Yadav, A.

AU - Xu, R.

AU - Xu, L.

AU - Xiong, Z.

AU - Xiong, K.

AU - Wu, Y.

AU - Schmidt, N. V.

AU - Schambach, J.

AU - Read, K. F.

AU - Bock, F.

PY - 2026/2

Y1 - 2026/2

N2 - The transverse momentum spectra and integrated yields of anti-Σ hyperons (Σ¯±) have been measured in pp and p-Pb collisions at sNN=5.02 TeV with the ALICE experiment. Measurements are performed via the newly accessed decay channel Σ¯±→n¯π±. A new method of antineutron reconstruction with the PHOS electromagnetic spectrometer is developed and applied to this analysis. The pT spectra of Σ¯± are measured in the range 0.5

AB - The transverse momentum spectra and integrated yields of anti-Σ hyperons (Σ¯±) have been measured in pp and p-Pb collisions at sNN=5.02 TeV with the ALICE experiment. Measurements are performed via the newly accessed decay channel Σ¯±→n¯π±. A new method of antineutron reconstruction with the PHOS electromagnetic spectrometer is developed and applied to this analysis. The pT spectra of Σ¯± are measured in the range 0.5

UR - https://www.scopus.com/pages/publications/105032038577

U2 - 10.1140/epjc/s10052-025-15129-2

DO - 10.1140/epjc/s10052-025-15129-2

M3 - Article

AN - SCOPUS:105032038577

SN - 1434-6044

VL - 86

JO - European Physical Journal C

JF - European Physical Journal C

IS - 2

M1 - 132

ER -

Σ ̄± production in pp and p-Pb collisions at sNN=5.02 TeV with ALICE

Abstract

Funding

Access to Document

Other files and links

Fingerprint

Cite this