Электронный каталог

Статья

Acharya, S.
First Observation of Strange Baryon Enhancement with Effective Energy in pp Collisions at the LHC / S.Acharya, B.Batyunya, R.A.Diaz, S.Grigoryan, A.Kondratyev, A.Kuznetsov, L.Malinina, K.Mikhaylov, P.Nomokonov, V.Pozdniakov, E.Rogochaya, A.Vodopyanov, [ALICE Collab.] // Journal of High Energy Physics. – 2025. – Vol. 2025, No. 3. – P. 029. – URL: https://doi.org/10.1007/JHEP03(2025)029. – Bibliogr.: 52.

The production of (multi-)strange hadrons is measured at midrapidity in protonproton collisions at √s = 13 TeV as a function of the local charged-particle multiplicity in the pseudorapidity interval |η| < 0.5 and of the very-forward energy measured by the ALICE Zero-Degree Calorimeters. The latter provides information on the efective energy, i.e. the energy available for particle production in the collision once subtracted from the centre-of-mass energy. The yields of K&sup(0)&sub(S), Λ+Λ^-, and Ξ− +Ξ^-&sup(+) per charged-particle increase with the efective energy. In addition, this work exploits a multi-diferential approach to decouple the roles of local multiplicity and efective energy in such an enhancement. The results presented in this article provide new insights into the interplay between global properties of the collision, such as the initial available energy in the event, and the locally produced fnal hadronic state, connected to the charged-particle multiplicity at midrapidity. Notably, a strong increase of strange baryon production with efective energy is observed for fxed charged-particle multiplicity at midrapidity. These results are discussed within the context of existing phenomenological models of hadronisation implemented in diferent tunes of the PYTHIA 8 event generator.



ОИЯИ = ОИЯИ (JINR)2025
Спец.(статьи,препринты) = С 346.2в - Взаимодействие протонов с протонами
Спец.(статьи,препринты) = С 346.6 - Резонансы и новые частицы