A1 Journal article (refereed)
Hypertriton Production in p-Pb Collisions at √sNN = 5.02 TeV (2022)
ALICE Collaboration. (2022). Hypertriton Production in p-Pb Collisions at √sNN = 5.02 TeV. Physical Review Letters, 128(25), Article 252003. https://doi.org/10.1103/PhysRevLett.128.252003
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Publication details
All authors or editors: ALICE Collaboration
Journal or series: Physical Review Letters
ISSN: 0031-9007
eISSN: 1079-7114
Publication year: 2022
Publication date: 23/06/2022
Volume: 128
Issue number: 25
Article number: 252003
Publisher: American Physical Society
Publication country: United States
Publication language: English
DOI: https://doi.org/10.1103/PhysRevLett.128.252003
Publication open access: Openly available
Publication channel open access: Partially open access channel
Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/82594
Abstract
The study of nuclei and antinuclei production has proven to be a powerful tool to investigate the formation mechanism of loosely bound states in high-energy hadronic collisions. The first measurement of the production of 3ΛH in p-Pb collisions at √sNN=5.02 TeV is presented in this Letter. Its production yield measured in the rapidity interval −1<0 for the 40% highest-multiplicity p-Pb collisions is dN/dy=[6.3±1.8(stat)±1.2(syst)]×10−7. The measurement is compared with the expectations of statistical hadronization and coalescence models, which describe the nucleosynthesis in hadronic collisions. These two models predict very different yields of the hypertriton in charged particle multiplicity environments relevant to small collision systems such as p-Pb, and therefore the measurement of dN/dy is crucial to distinguish between them. The precision of this measurement leads to the exclusion with a significance larger than 6.9σ of some configurations of the statistical hadronization model, thus constraining the theory behind the production of loosely bound states at hadron colliders.
Keywords: particle physics
Contributing organizations
Ministry reporting: Yes
Reporting Year: 2022
JUFO rating: 3
