Tue·Aug 2, 2016Tuesday·August 2, 2016

1. 01*

   Soft QGP probes with ALICE

   Łukasz Kamil Graczykowski (for the ALICE Collaboration)🇵🇱

   In heavy-ion collisions at the LHC a hot and dense medium of deconfided partons, the Quark-Gluon Plasma (QGP), is created. Its global properties can be characterized by the measurements of particles in the low transverse momentum (or "soft") regime, which represent the majority of created particles. In this report we outline a selection of measurements of the soft probes by the ALICE experiment in pp, p--Pb, and Pb--Pb collisions. The paper focuses on recent flow measurements via angular correlations and femtoscopic studies. The first ever preliminary analysis of ${\mathrm{K}}_{\mathrm{S}}^0{\mathrm{K}}^{\pm }$ femtoscopy is also presented.

   nucl-exActa Phys.Polon.B(2016)·1 citation
2. 02*

   Determination of the neutron capture cross sections of 232Th at 14.1 MeV and 14.8 MeV using the neutron activation method

   Chang-Lin Lan · Bao-Lin Xie · Meng Peng · Tao Lv · Ze-en Yao · Jin-Gen Chen · Xiang-Zhong Kong

   The 232Th(n,{\gamma})233Th neutron capture reaction cross sections were measured at average neutron energies of 14.1 MeV and 14.8 MeV using the activation method. The neutron flux was determined using the monitor reaction 27Al(n,{\alpha})24Na. The induced gamma-ray activities were measured using a low background gamma ray spectrometer equipped with a high resolution HPGe detector. The experimentally determined cross sections were compared with the literatures data, evaluated data of ENDF/B-VII, JENDL-4.0, and CENDL-3.1. The Excitation functions of 232Th(n,{\gamma}) reaction were also calculated theoretically using the TALYS 1.6 computer code.

   nucl-exCPC(2017)·1 citation
3. 03*

   Analysis of Neutron Stars Observations Using a Correlated Fermi Gas Model

   O. Hen🇺🇸 · A.W. Steiner🇺🇸 · E. Piasetzky🇮🇱 · L.B. Weinstein🇺🇸

   Background: The nuclear symmetry energy is a fundamental ingredient in determining the equation of state (EOS) of neutron stars (NS). Recent terrestrial experiments constrain both its value and slope at nuclear saturation density, however, its value at higher densities is unknown. Assuming a Free Fermi-gas (FFG) model for the kinetic symmetry energy, the high-density extrapolation depends on a single parameter, the density dependence of the potential symmetry energy. The Correlated Fermi-gas (CFG) model improves on the FFG model by including the effects of short-range, correlated, high-momentum, nucleons in nuclear matter. Using the CFG model for the kinetic symmetry energy along with constraints from terrestrial measurements leads to a much softer density dependence for the potential symmetry energy. Purpose: Examine the ability of the FFG and CFG models to describe NS observables that are directly sensitive to the symmetry energy at high-density. Specifically, examine the ability of the CFG model, with its softer density dependence of the potential symmetry energy, to describe a two solar-mass NS. Methods: Using a Bayesian analysis of NS observables we compare the CFG and FFG models and examine the resulting parameters in the NS EOS and the density dependence of the potential symmetry energy. Results: Despite the large difference in the density dependence of the potential part of the symmetry energy, both models can describe the NS data and support a two solar-mass NS. The different density dependences has only a small effect on the NS EOS. Conclusions: While sensitive to the high-density values of the symmetry energy, NS observables alone are not enough to distinguish between the CFG and FFG models. This indicates that the NS EOS, obtain from Bayesian analysis of NS observables, is robust and is not sensitive to the exact nuclear model used for the kinetic symmetry energy.

   nucl-exastro-ph.HEastro-ph.SRnucl-th13 citations
4. 04*

   Inclusive breakup of Borromean nuclei

   Mahir S. Hussein🇧🇷 · Brett V. Carlson🇧🇷 · Tobias Frederico🇧🇷

   We derive the inclusive breakup cross section of a three-fragment projectile nuclei, $a=b+x_1+x_2$, in the spectator model. The resulting four-body cross section for observing $b$, is composed of the elastic breakup cross section which contains information about the correlation between the two participant fragments, and the inclusive non-elastic breakup cross section. This latter cross section is found to be a non-trivial four-body generalization of the Austern formula \cite{Austern1987}, which is proportional to a matrix element of the form, $⟨{\hat{\rho }}_{x_1,x_2}\left|\left[W_{x_1}+W_{x_2}+W_{3B}\right]\right|{\hat{\rho }}_{x_1,x_2}⟩$. The new feature here is the three-body absorption, represented by the imaginary potential, $W_{3B}$. We analyze this type of absorption and supply ideas of how to calculate its contribution.

   ↳ nucl-thnucl-exJ.Phys.Conf.Ser.(2017)·2 citations
5. 05*

   Taiwan EXperiment On NeutrinO -- History, Status and Prospects

   Henry Tsz-King Wong🇹🇼

   We present an overview of the foundation, evolution, contributions and future prospects of the TEXONO Collaboration and its research programs on neutrino physics and dark matter searches at the Kuo-Sheng Reactor Neutrino Laboratory in Taiwan and, as a founding partner of the CDEX program, at the China Jinping Underground Laboratory in China.

   ↳ hep-exhep-phnucl-exphysics.ins-detThe Universe(2015)·57 citations

* Reconstructed cohort: no mailing for this day survives in the archive. Papers are grouped by their submission times and arXiv's announcement cut-off, assuming announcement without delay; positions follow identifier order. Validated at ~91% exact-day agreement against the archived era.