Σ+ production in pp collisions at s=13 TeV

ALICE Collaboration

doi:10.1140/epjc/s10052-025-15095-9

Σ+ production in pp collisions at s=13 TeV

ALICE Collaboration

Physics Education

Max Planck Institute for Physics (Werner Heisenberg Institute)
Czech Technical University in Prague
Agenzia nazionale per le nuove tecnologie, l'energia e lo sviluppo economico sostenibile
Universidade de São Paulo
Department of Applied Physics
Aligarh Muslim University
University of Wrocław
Universidad Nacional Autónoma de México
CERN
National Institute for Nuclear Physics
University of Brescia
Central China Normal University
GSI Helmholtz Centre for Heavy Ion Research
University of Science and Technology of China
Fudan University
University of Copenhagen
China National Nuclear Corporation
Université Clermont Auvergne
Université Paris-Saclay
Heidelberg University
Czech Academy of Sciences
University of Bergen
Chungbuk National University
Inha University
Pusan National University
University of California at Berkeley
Hiroshima University
Variable Energy Cyclotron Centre India
University of Bonn
Institut de Physique des 2 Infinis de Lyon
University of Texas at Austin

Research output: Contribution to journal › Journal article › peer-review

Abstract

The measurement of Σ+ production in pp collisions at s=13 TeV is presented. The measurement is performed at midrapidity in both minimum-bias and high-multiplicity pp collisions at s=13 TeV. The Σ+ is reconstructed via its weak-decay topology in the decay channel Σ+→p+π0 with π0→γ+γ. In a novel approach, the neutral pion is reconstructed by combining photons that convert in the detector material with photons measured in the calorimeters. The transverse-momentum (pT) distributions of the Σ+ and its rapidity densities dN/dy in both event classes are reported. The pT spectrum in minimum-bias collisions is compared to QCD-inspired event generators. The ratio of Σ+ to previously measured Λ baryons is in good agreement with calculations from the Statistical Hadronization Model. The high efficiency and purity of the novel reconstruction method for Σ+ presented here will enable future studies of the interaction of Σ+ with protons in the context of femtoscopic measurements, which could be crucial for understanding the equation of state of neutron stars.

Original language	English
Article number	101
Journal	European Physical Journal C
Volume	86
Issue number	2
DOIs	https://doi.org/10.1140/epjc/s10052-025-15095-9
State	Published - 2026.02

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10.1140/epjc/s10052-025-15095-9

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@article{72463e444f174a0d91f2674faa1feaa7,

title = "Σ+ production in pp collisions at s=13 TeV",

abstract = "The measurement of Σ+ production in pp collisions at s=13 TeV is presented. The measurement is performed at midrapidity in both minimum-bias and high-multiplicity pp collisions at s=13 TeV. The Σ+ is reconstructed via its weak-decay topology in the decay channel Σ+→p+π0 with π0→γ+γ. In a novel approach, the neutral pion is reconstructed by combining photons that convert in the detector material with photons measured in the calorimeters. The transverse-momentum (pT) distributions of the Σ+ and its rapidity densities dN/dy in both event classes are reported. The pT spectrum in minimum-bias collisions is compared to QCD-inspired event generators. The ratio of Σ+ to previously measured Λ baryons is in good agreement with calculations from the Statistical Hadronization Model. The high efficiency and purity of the novel reconstruction method for Σ+ presented here will enable future studies of the interaction of Σ+ with protons in the context of femtoscopic measurements, which could be crucial for understanding the equation of state of neutron stars.",

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 W. Wu and Wu, \{C. T.\} and Wright, \{J. R.\} and Kim, \{E. J.\}",

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

year = "2026",

month = feb,

doi = "10.1140/epjc/s10052-025-15095-9",

language = "English",

volume = "86",

journal = "European Physical Journal C",

issn = "1434-6044",

number = "2",

}

TY - JOUR

T1 - Σ+ production in pp collisions at s=13 TeV

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 - Wu, W.

AU - Wu, C. T.

AU - Wright, J. R.

AU - Kim, E. J.

PY - 2026/2

Y1 - 2026/2

N2 - The measurement of Σ+ production in pp collisions at s=13 TeV is presented. The measurement is performed at midrapidity in both minimum-bias and high-multiplicity pp collisions at s=13 TeV. The Σ+ is reconstructed via its weak-decay topology in the decay channel Σ+→p+π0 with π0→γ+γ. In a novel approach, the neutral pion is reconstructed by combining photons that convert in the detector material with photons measured in the calorimeters. The transverse-momentum (pT) distributions of the Σ+ and its rapidity densities dN/dy in both event classes are reported. The pT spectrum in minimum-bias collisions is compared to QCD-inspired event generators. The ratio of Σ+ to previously measured Λ baryons is in good agreement with calculations from the Statistical Hadronization Model. The high efficiency and purity of the novel reconstruction method for Σ+ presented here will enable future studies of the interaction of Σ+ with protons in the context of femtoscopic measurements, which could be crucial for understanding the equation of state of neutron stars.

AB - The measurement of Σ+ production in pp collisions at s=13 TeV is presented. The measurement is performed at midrapidity in both minimum-bias and high-multiplicity pp collisions at s=13 TeV. The Σ+ is reconstructed via its weak-decay topology in the decay channel Σ+→p+π0 with π0→γ+γ. In a novel approach, the neutral pion is reconstructed by combining photons that convert in the detector material with photons measured in the calorimeters. The transverse-momentum (pT) distributions of the Σ+ and its rapidity densities dN/dy in both event classes are reported. The pT spectrum in minimum-bias collisions is compared to QCD-inspired event generators. The ratio of Σ+ to previously measured Λ baryons is in good agreement with calculations from the Statistical Hadronization Model. The high efficiency and purity of the novel reconstruction method for Σ+ presented here will enable future studies of the interaction of Σ+ with protons in the context of femtoscopic measurements, which could be crucial for understanding the equation of state of neutron stars.

UR - https://www.scopus.com/pages/publications/105032054692

U2 - 10.1140/epjc/s10052-025-15095-9

DO - 10.1140/epjc/s10052-025-15095-9

M3 - Journal article

AN - SCOPUS:105032054692

SN - 1434-6044

VL - 86

JO - European Physical Journal C

JF - European Physical Journal C

IS - 2

M1 - 101

ER -

Σ+ production in pp collisions at s=13 TeV

Abstract

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