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.

Measurement of the transverse-momentum fraction of strange hadrons from jet-like correlation structures in pp collisions at s=13 TeV / Abdallah, D.A.H., Abualrob, I.J., Acharya, S., Agarwal, K., Aglieri Rinella, G., Aglietta, L., Agrawal, N., Ahammed, Z., Ahmad, S., Ahuja, I., Akbar, Z., Akishina, V., Al-Turany, M., Alessandro, B., Alfarasyi, A.R., Alfaro Molina, R., Ali, B., Alici, A., Alme, J., Alocco, G., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 880:(2026). [10.1016/j.physletb.2026.140766]

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

Bufalino, S.;Di Costanzo, M.;Follo, U.;Gioachin, G.;Lucia, G. A.;Pagliarino, V.;
2026

Abstract

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.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/3016060
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