Nuclear Theory·nucl-th

Monday·March 21, 2016

7 papers—3 primary·4 cross-listed

01
[Submitted on 18 Mar 2016]
Hadron-Hadron Correlation and Interaction from Heavy-Ion Collisions
Akira Ohnishi🇯🇵 · Kenji Morita🇯🇵 · Kenta Miyahara🇯🇵 · Tetsuo Hyodo🇯🇵
We investigate the $ΛΛ$ and $K^{-} p$ intensity correlations in high-energy heavy-ion collisions. First, we examine the dependence of the $ΛΛ$ correlation on the $ΛΛ$ interaction and the $ΛΛ$ pair purity probability $λ$ . For small $λ$ , the correlation function needs to be suppressed by the $ΛΛ$ interaction in order to explain the recently measured $ΛΛ$ correlation data. By comparison, when we adopt the $λ$ value evaluated from the experimentally measured $Σ^{0} /Λ$ ratio, the correlation function needs to be enhanced by the interaction. We demonstrate that these two cases correspond to the two analyses which gave opposite signs of the $ΛΛ$ scattering length. Next, we discuss the $K^{-} p$ correlation function. By using the local $K ˉ N$ potential which reproduces the kaonic hydrogen data by SIDDHARTA, we obtain the $K^{-} p$ correlation function. We find that the $K^{-} p$ correlation can provide a complementary information with the $K^{-} p$ elastic scattering amplitude.
Comments:
14 pages, 5 figures
Subjects:
Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph); Nuclear Experiment (nucl-ex)
arXiv:
1603.05761 [pdf]
NPA(2016)·74 citations
02
[Submitted on 18 Mar 2016]
Highly-anisotropic hydrodynamics for central collisions
Radoslaw Ryblewski🇵🇱
The framework of leading-order anisotropic hydrodynamics is supplemented with realistic equation of state and self-consistent freeze-out prescription. The model is applied to central proton-nucleus collisions. The results are compared to those obtained within standard Israel-Stewart second-order viscous hydrodynamics. It is shown that the resulting hadron spectra are highly-sensitive to the hydrodynamic approach that has been used.
Comments:
Talk presented at XI Workshop on Particle Correlations and Femtoscopy, 3-7 November 2015, Warsaw, Poland
Subjects:
Nuclear Theory (nucl-th); High Energy Physics — Phenomenology (hep-ph)
arXiv:
1603.05842 [pdf]
Acta Phys.Polon.Supp.(2016)·0 citations
03
[Submitted on 18 Mar 2016]
Formation of deuterons by coalescence: Consequences on the deuteron number fluctuations
Zuzana Feckova🇸🇰 · Jan Steinheimer🇩🇪 · Boris Tomasik🇸🇰 · Marcus Bleicher🇩🇪
Two scenarios for cluster production have since long been discussed in the literature: i) direct emission of the clusters from a (grand canonical) thermal source or ii) subsequent formation of the clusters by coalescence of single nucleons. While both approaches have been successfully applied in the past it has not yet been clarified which of the two mechanisms dominates the cluster production. We propose to use recently developed event-by-event techniques to study particle multiplicity fluctuations on nuclear clusters and employ this analysis to the deuteron number fluctuations to disentangle the two production mechanisms. We argue that for a grand canonical cluster formation, the cluster fluctuations will follow Poisson distribution, while for the coalescence scenario, the fluctuations will strongly deviate from the Poisson expectation. We estimate the effect to be 10% for the variance and up to a factor of 5 for the kurtosis of the deuteron number multiplicity distribution. Our prediction can be tested in the beam energy scan program at RHIC as well as experiments at the FAIR and NICA facilities.
Comments:
5 pages, 5 figures
Subjects:
Nuclear Theory (nucl-th); Nuclear Experiment (nucl-ex)
arXiv:
1603.05854 [pdf]
PRC(2016)·31 citations

Affiliations

first authorsco-authorsvia INSPIRE

Hadron-Hadron Correlation and Interaction from Heavy-Ion Collisions

Highly-anisotropic hydrodynamics for central collisions

Formation of deuterons by coalescence: Consequences on the deuteron number fluctuations

Affiliations