Measurement of strange baryon–antibaryon interactions with femtoscopic correlations
ALICE Collaboration. (2020). Measurement of strange baryon–antibaryon interactions with femtoscopic correlations. Physics Letters B, 802, Article 135223. https://doi.org/10.1016/j.physletb.2020.135223
Published in
Physics Letters BAuthors
Date
2020Discipline
FysiikkaYdin- ja kiihdytinfysiikan huippuyksikköPhysicsCentre of Excellence in Nuclear and Accelerator Based PhysicsCopyright
© 2020 The Authors. Published by Elsevier B.V.
Two-particle correlation functions were measured for pp‾, pΛ‾, p‾Λ, and ΛΛ‾ pairs in Pb–Pb collisions at sNN=2.76 TeV and sNN=5.02 TeV recorded by the ALICE detector. From a simultaneous fit to all obtained correlation functions, real and imaginary components of the scattering lengths, as well as the effective ranges, were extracted for combined pΛ‾ and p‾Λ pairs and, for the first time, for ΛΛ‾ pairs. Effective averaged scattering parameters for heavier baryon–antibaryon pairs, not measured directly, are also provided. The results reveal similarly strong interaction between measured baryon–antibaryon pairs, suggesting that they all annihilate in the same manner at the same pair relative momentum k⁎. Moreover, the reported significant non-zero imaginary part and negative real part of the scattering length provide motivation for future baryon–antibaryon bound state searches.
Publisher
ElsevierISSN Search the Publication Forum
0370-2693Keywords
Publication in research information system
https://converis.jyu.fi/converis/portal/detail/Publication/34629942
Metadata
Show full item recordCollections
License
Related items
Showing items with similar title or keywords.
-
Studying strangeness and baryon production mechanisms through angular correlations between charged Ξ baryons and identified hadrons in pp collisions at √s = 13 TeV
The ALICE collaboration (Springer Nature, 2024)The angular correlations between charged Ξ baryons and associated identified hadrons (pions, kaons, protons, Λ baryons, and Ξ baryons) are measured in pp collisions at √s=13 TeV with the ALICE detector to give insight into ... -
Investigating the role of strangeness in baryon–antibaryon annihilation at the LHC
ALICE Collaboration (Elsevier BV, 2022)Annihilation dynamics plays a fundamental role in the baryon–antibaryon interaction (B–B‾) at low-energy and its strength and range are crucial in the assessment of possible baryonic bound states. Experimental data on ... -
Investigating strangeness enhancement with multiplicity in pp collisions using angular correlations
The ALICE collaboration (Springer Nature, 2024)A study of strange hadron production associated with hard scattering processes and with the underlying event is conducted to investigate the origin of the enhanced production of strange hadrons in small collision systems ... -
Investigating baryon production in p-Pb collisions in jets and the underlying event using angular correlations
ALICE Collaboration (American Physical Society (APS), 2025)First measurements of hadron-Λ (ℎ−Λ) azimuthal angular correlations in 𝑝-Pb collisions at √𝑠𝑁𝑁 =5.02 TeV using the ALICE detector at the Large Hadron Collider are presented. These correlations are used to separate the ... -
Measurement of the Cross Sections of Ξ0c and Ξ+c Baryons and of the Branching-Fraction Ratio BR(Ξ0c→Ξ−e+νe)/BR(Ξ0c→Ξ−π+) in pp Collisions at √s = 13 TeV
ALICE Collaboration (American Physical Society, 2021)The pT-differential cross sections of prompt charm-strange baryons Ξ0c and Ξ+c were measured at midrapidity (|y|<0.5) in proton-proton (pp) collisions at a center-of-mass energy √s = 13 TeV with the ALICE detector at the ...