期刊论文

Sheng, XL

英文

PHYSICAL REVIEW D

2470-0010

2024

109

3

036004

10.1103/PhysRevD.109.036004

National Natural Science Foundation of China#&#&#12135011#&#&#11890713#&#&#11890710 Chinese Academy of Sciences#&#&#XDB34030102 Office of Energy Research and Development High Energy Physics Nuclear Physics U.S. Department of Energy#&#&#DE-AC02-05CH11231 European Commission Ministero dell’Università e della Ricerca Heavy flavour dynamics in the early stage of ultrarelativistic collisions

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We propose a relativistic theory for spin density matrices of vector mesons based on Kadanoff-Baym equations in the closed-time-path formalism. The theory puts the calculation of spin observables such as the spin density matrix element rho 00 for vector mesons on a solid ground. Within the theory we formulate rho 00 for phi mesons into a factorization form in separation of momentum and spacetime variables. We argue that the main contribution to rho 00 at lower energies should be from the phi fields that can polarize the strange quark and antiquark in the same way as electromagnetic fields. The...