Nuclear Theory·nucl-th

Wednesday·January 4, 2023

3 papers—1 primary·2 cross-listed

02
The $Σ$ and $Ξ$ electromagnetic form factors in the extended vector meson dominance model
Bing Yan🇨🇳 · Cheng Chen🇨🇳 · Ju-Jun Xie🇨🇳
We propose a phenomenological extended vector meson dominance model for the baryon electromagnetic structure, and it is found that the current experimental data on the $Σ$ and $Ξ$ electromagnetic form factors in the time-like region can be well described. Meanwhile, we can also reproduce the ratios of the total cross sections of reactions $e^{+} e^{-} \to Σ^{+} Σ ˉ^{-}$ , $Σ^{0} Σ ˉ^{0}$ , and $Σ^{-} Σ ˉ^{+}$ , which are $9.7 \pm 1.3 : 3.3 \pm 0.7 : 1$ at center-of-mass energies from $2.3864$ to $3.02$ GeV. We also analytically continue the expression of the form factors to space-like region and estimate the charge radii of the $Σ$ and $Ξ$ hyperons. The result for the $Σ^{-}$ is in agreement with the experimental date.
↳ hep-phnucl-thPRD(2023)·24 citations
03
Bottomonium suppression in the quark-gluon plasma -- From effective field theories to non-unitary quantum evolution
Michael Strickland🇺🇸
In this proceedings contribution I review recent work which computes the suppression of bottomonium production in heavy-ion collisions using open quantum systems methods applied within the potential non-relativistic quantum chromodynamics (pNRQCD) effective field theory. I discuss how the computation of bottomonium suppression can be reduced to solving a Gorini-Kossakowski-Sudarshan-Lindblad (GKSL) quantum master equation for the evolution of the b-bbar reduced density matrix. The open quantum systems approach used allows one to take into account the non-equilibrium dynamics and decoherence of bottomonium in the quark-gluon plasma. Finally, I present comparisons of phenomenological predictions obtained using a recently obtained next-to-leading-order GKSL equation with ALICE, ATLAS, and CMS experimental data for bottomonium suppression and elliptic flow.
↳ hep-phnucl-thActa Phys.Polon.Supp.(2023)·0 citations

Affiliations

first authorsco-authorsvia INSPIRE

The Σ and Ξ electromagnetic form factors in the extended vector meson dominance model

Bottomonium suppression in the quark-gluon plasma -- From effective field theories to non-unitary quantum evolution

Affiliations

The $Σ$ and $Ξ$ electromagnetic form factors in the extended vector meson dominance model