Nuclear Theory·nucl-th

Friday·November 4, 2016

3 papers—2 primary·1 cross-listed

01
Rapidity correlations test stochastic hydrodynamics
Christopher Zin🇺🇸 · Sean Gavin🇺🇸 · George Moschelli🇺🇸
We show that measurements of the rapidity dependence of transverse momentum correlations can be used to determine the characteristic time $τ_{π}$ that dictates the rate of isotropization of the stress energy tensor, as well as the shear viscosity $ν = η / s T$ . We formulate methods for computing these correlations using second order dissipative hydrodynamics with noise. Current data are consistent with $τ_{π} / ν \sim 10$ but targeted measurements can improve this precision.
nucl-thJ.Phys.Conf.Ser.(2017)·0 citations
02
Improvements and Testing Practical Expressions for Photon Strength Functions of E1 Gamma-Transitions
Vladimir Plujko · Oleksandr Gorbachenko · Igor Kadenko · Kateryna Solodovnyk
Analytical expression for the E1 photon strength functions (PSF) is modified to account for the low-energy enhancement due to nuclear structure effects (presence of low-energy state (LES)). A closed-form expression of the E1 PSF function includes response of two nuclear states: LES and giant diplole resonance (GDR). Expression for the nuclear response function on electromagnetic field is based on a model of excitation of two coupled damped states. These approach is tested for different data sets for spherical nuclei. Impact on PSF shape of coupling between LES and GDR excitations is considered.
nucl-thEPJ Web Conf.(2017)·2 citations

Affiliations

first authorsco-authorsvia INSPIRE