Apr 23 – 27, 2023
JMS Aster Plaza
Asia/Tokyo timezone

Relativistic spin dynamics for vector mesons

Apr 24, 2023, 3:50 PM
Large Meeting Room, 4th Floor (JMS Aster Plaza)

Large Meeting Room, 4th Floor

JMS Aster Plaza

Oral Intense field and vorticity Parallel Session B


Prof. Qun Wang (University of Science and Technology of China)


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 space-time variables. The key observation is that there is correlation inside the $\phi$ meson wave function between the $\phi$ field that polarizes the strange quark and that polarizes the strange antiquark. This is reflected by the fact that the contributions to $\rho_{00}$ are all in squares of fields which are nonvanishing even if the fields may strongly fluctuate in space-time. The fluctuation of strong force fields can be extracted from $\rho_{00}$ of quarkonium vector mesons as links to fundamental properties of quantum chromodynamics.

Theory / experiment Theory

Primary authors

Lucia Oliva (Università di Catania, INFN Catania) Prof. Qun Wang (University of Science and Technology of China) Dr Xin-Li Sheng Dr Xin-Nian Wang (Lawrence Berkeley National Lab. (US)) Zuo-tang Liang (Shandong Uniersity)

Presentation materials