Measurement of the transverse-momentum fraction of strange hadrons from jet-like correlation structures in pp collisions at s=13 TeV


Abdallah D., Abualrob I., Acharya S., Agarwal K., Aglieri Rinella G., Aglietta L., ...Daha Fazla

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, cilt.880, 2026 (SCI-Expanded, Scopus)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 880
  • Basım Tarihi: 2026
  • Doi Numarası: 10.1016/j.physletb.2026.140766
  • Dergi Adı: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, INSPEC, MathSciNet, zbMATH, Directory of Open Access Journals, Academic Search Ultimate (EBSCO), Engineering Source (EBSCO)
  • Anahtar Kelimeler: Hadronization, Jet fragmentation, Strangeness, Transverse-momentum fraction, Two-particle correlations
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

The first measurements of the average transverse-momentum fraction (⟨ z ⟩) as a function of transverse momentum (p T) for strange baryons (Λ and Λ‾) and strange mesons (KS0), produced in mini-jets defined through angular correlations in pp collisions at s=13 TeV, are reported by the ALICE Collaboration at the LHC. The observable is obtained using a novel method, where the angular correlation between the strange hadrons and inclusive charged hadrons is weighted by the p T of correlated particles at small angular distance. As a function of strange particles’ p T, the results reveal a flat trend for strange mesons and a decreasing trend for strange baryons in the measured p T region, indicating distinct hadronization mechanisms for KS0 and Λ (Λ‾). The measurements are compared to Monte Carlo models, namely Pythia 8 (with both Monash and Color Rope tunes) and the AMPT (A Multi-Phase Transport) model with string melting. None of these models provides a satisfactory description of the ⟨ z ⟩ distributions at low and intermediate p T.