Электронный каталог

Статья

Acharya, S.
Measurements of Chemical Potentials in Pb-Pb Collisions at *%s&sub(NN)=5.02 TeV / S.Acharya, B.Batyunya, C.Ceballos Sanchez, R.A.Diaz, S.Grigoryan, A.Kondratyev, L.Malinina, K.Mikhaylov, P.Nomokonov, V.Pozdniakov, E.Rogochaya, B.Rumyantsev, A.Vodopyanov, [ALICE Collab.] // Physical Review Letters [Electronic resource]. – 2024. – Vol. 133, No. 9. – P. 092301. – URL: https://doi.org/10.1103/PhysRevLett.133.092301. – Bibliogr.: 131.

This Letter presents the most precise measurement to date of the matter-antimatter imbalance at midrapidity in Pb-Pb collisions at a center-of-mass energy per nucleon pair √𝑠NN=5.02  TeV. Using the Statistical Hadronization framework, it is possible to obtain the value of the electric charge and baryon chemical potentials, 𝜇𝑄=−0.18±0.90  MeV and 𝜇𝐵=0.71±0.45  MeV, with unprecedented precision. A centrality-differential study of the antiparticle-to-particle yield ratios of charged pions, protons, Ω baryons, and light (hyper)nuclei is performed. These results indicate that the system created in Pb-Pb collisions at the LHC is on average baryon-free and electrically neutral at midrapidity.



ОИЯИ = ОИЯИ (JINR)2024
Спец.(статьи,препринты) = С 343 е2 - Взаимодействие релятивистских ядер с ядрами