Электронный каталог

Статья

Acharya, S.
Search for Quasiparticle Scattering in the Quark-Gluon Plasma with Jet Splittings in pp and Pb-Pb Collisions at *%s&sub(NN)=5.02 TeV / 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.]. – Text : electronic // Physical Review Letters. – 2025. – Vol. 135, No. 3. – P. 031901. – URL: https://doi.org/10.1103/PhysRevLett.135.031901. – Bibliogr.: 98.

The ALICE Collaboration reports measurements of the large relative transverse momentum (𝑘&sub(𝑇)) component of jet substructure in 𝑝⁢𝑝 and Pb-Pb collisions at center-of-mass energy per nucleon pair √𝑠NN=5.02  TeV. Enhancement in the yield of such large-𝑘&sub(T) emissions in head-on Pb-Pb collisions is predicted to arise from partonic scattering with quasiparticles of the quark-gluon plasma. The analysis utilizes charged-particle jets reconstructed by the anti-𝑘T algorithm with resolution parameter 𝑅 =0.2 in the transverse-momentum interval 60<𝑝&sub(T,ch,jet)<80  GeV/𝑐. The soft drop and dynamical grooming algorithms are used to identify high transverse momentum splittings in the jet shower. Comparison of measurements in Pb-Pb and 𝑝⁢𝑝 collisions shows medium-induced narrowing, corresponding to yield suppression of high-𝑘&sub(𝑇) splittings, in contrast to the expectation of yield enhancement due to quasiparticle scattering. The measurements are compared to theoretical model calculations incorporating jet modification due to jet-medium interactions (“jet quenching”), both with and without quasiparticle scattering effects. These measurements provide new insight into the underlying mechanisms and theoretical modeling of jet quenching.



ОИЯИ = ОИЯИ (JINR)2025
Спец.(статьи,препринты) = С 346.2в - Взаимодействие протонов с протонами
Спец.(статьи,препринты) = С 343 е1 - Взаимодействие тяжелых ионов с ядрами
Спец.(статьи,препринты) = С 323.5д - Кварк-глюонная плазма