Nuclear Theory·nucl-th

Monday·December 18, 2017

11 papers—8 primary·3 cross-listed

09
The Photon in Dense Nuclear Matter I: Random Phase Approximation
Stephan Stetina🇦🇹 · Ermal Rrapaj🇺🇸 · Sanjay Reddy🇺🇸
We present a comprehensive and pedagogic discussion of the properties of photons in cold and dense nuclear matter based on the resummed one-loop photon self energy. Correlations between electrons, muons, protons and neutrons in beta equilibrium that arise due to electromagnetic and strong interactions are consistently taken into account within the random phase approximation. Screening effects and damping as well as collective excitations are systematically studied in a fully relativistic setup. Our study is relevant to linear response theory of dense nuclear matter, calculations of transport properties of cold dense matter and to investigations of the production and propagation of hypothetical vector bosons such as the dark photons.
↳ astro-ph.HEcond-mat.othernucl-thPRC(2018)·14 citations
10
Predictions on three-particle azimuthal correlations in proton-proton collisions
Şener Özönder🇹🇷
The ridge signal, which is long-ranged in rapidity, in the di-hadron correlations in high-multiplicity p-p and p-A collisions opened up a whole new research area in high-energy QCD. Although the ridge had been observed in A-A collisions and interpreted as a result of the radial flow of quark-gluon plasma, it had not appeared until recently in the data of small collision systems such as p-p and p-A, nor had it been predicted theoretically or seen in the event generators. There are two competing approaches that attempt to explain the systematics of the di-hadron ridge signal; hydrodynamics and gluon saturation physics (color glass condensate/glasma). In this work, we present predictions for the transverse momentum and rapidity dependence of the three-particle correlation function within the gluon saturation physics. Tri-hadron correlations can be measured, and the data can possibly rule out one of the two alternative approaches.
↳ hep-phnucl-thTurk.J.Phys.(2018)·7 citations
11
$Z_{c} (3900) / Z_{c} (3885)$ as a virtual state from $π J / ψ - D ˉ^{*} D$ interaction
Jun He🇨🇳 · Dian-Yong Chen🇨🇳
In this work, we study the $J / ψ π$ and $D ˉ^{*} D$ invariant mass spectra of the $Y (4260)$ decay to find out the origin of the $Z_{c} (3900)$ and $Z_{c} (3885)$ structures. The $J / ψ π - D ˉ^{*} D$ interaction is studied in a coupled-channel quasipotential Bethe-Saltpeter equation approach, and embedded to the $Y (4260)$ decay process to reproduce both $J / ψ π^{-}$ and $D^{*-} D^{0}$ invariant mass spectra observed at BESIII simultaneously. It is found out that a virtual state at energy about 3870 MeV is produced from the interaction when both invariant mass spectra are comparable with the experiment. The results support that both $Z_{c} (3900)$ and $Z_{c} (3885)$ have the same origin, that is, a virtual state from $J / ψ π - D ˉ^{*} D$ interaction, in which the $D ˉ^{*} D$ interaction is more important and the coupling between $D ˉ^{*} D$ and $J / ψ π$ channels plays a minor role.
↳ hep-phnucl-thEPJC(2018)·43 citations

Affiliations

first authorsco-authorsvia INSPIRE

The Photon in Dense Nuclear Matter I: Random Phase Approximation

Predictions on three-particle azimuthal correlations in proton-proton collisions

Zc​(3900)/Zc​(3885) as a virtual state from πJ/ψ−Dˉ∗D interaction

Affiliations

$Z_{c} (3900) / Z_{c} (3885)$ as a virtual state from $π J / ψ - D ˉ^{*} D$ interaction